class ECMS
Public Class Methods
NECB2011::new
# File lib/openstudio-standards/standards/necb/ECMS/ecms.rb, line 36 def initialize super() @standards_data = load_standards_database_new @standards_data['curves'] = standards_data['tables']['curves']['table'] end
Public Instance Methods
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add air system with all its components
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 775 def add_air_system(model:, zones:, sys_abbr:, sys_vent_type:, sys_heat_rec_type:, sys_htg_eqpt_type:, sys_supp_htg_eqpt_type:, sys_clg_eqpt_type:, sys_supp_fan_type:, sys_ret_fan_type:, sys_setpoint_mgr_type:) # create all the needed components and the air loop airloop = create_airloop(model, sys_vent_type) setpoint_mgr = create_air_sys_spm(model, sys_setpoint_mgr_type, zones) supply_fan = create_air_sys_fan(model, sys_supp_fan_type) supply_fan.setName('Supply Fan') if supply_fan return_fan = create_air_sys_fan(model, sys_ret_fan_type) return_fan.setName('Return Fan') if return_fan htg_eqpt = create_air_sys_htg_eqpt(model, sys_htg_eqpt_type) supp_htg_eqpt = create_air_sys_htg_eqpt(model, sys_supp_htg_eqpt_type) clg_eqpt = create_air_sys_clg_eqpt(model, sys_clg_eqpt_type) # add components to the air loop clg_eqpt.addToNode(airloop.supplyOutletNode) if clg_eqpt htg_eqpt.addToNode(airloop.supplyOutletNode) if htg_eqpt supp_htg_eqpt.addToNode(airloop.supplyOutletNode) if supp_htg_eqpt supply_fan.addToNode(airloop.supplyOutletNode) if supply_fan setpoint_mgr.addToNode(airloop.supplyOutletNode) if setpoint_mgr # OA controller oa_controller = OpenStudio::Model::ControllerOutdoorAir.new(model) oa_controller.autosizeMinimumOutdoorAirFlowRate oa_system = OpenStudio::Model::AirLoopHVACOutdoorAirSystem.new(model, oa_controller) oa_system.addToNode(airloop.supplyInletNode) # Set airloop name sys_name_pars = {} sys_name_pars['sys_hr'] = 'none' sys_name_pars['sys_clg'] = sys_clg_eqpt_type sys_name_pars['sys_htg'] = sys_htg_eqpt_type sys_name_pars['sys_sf'] = 'cv' if sys_supp_fan_type == 'constant_volume' sys_name_pars['sys_sf'] = 'vv' if sys_supp_fan_type == 'variable_volume' sys_name_pars['zone_htg'] = 'none' sys_name_pars['zone_clg'] = 'none' sys_name_pars['sys_rf'] = 'none' sys_name_pars['sys_rf'] = 'cv' if sys_ret_fan_type == 'constant_volume' sys_name_pars['sys_rf'] = 'vv' if sys_ret_fan_type == 'variable_volume' assign_base_sys_name(airloop, sys_abbr: sys_abbr, sys_oa: sys_vent_type, sys_name_pars: sys_name_pars) return airloop, clg_eqpt, htg_eqpt, return_fan end
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Add air side economizer for each airloop
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 3657 def add_airloop_economizer(model:, airloop_economizer_type:) return if airloop_economizer_type.nil? || (airloop_economizer_type.to_s == 'NECB_Default') if airloop_economizer_type.downcase == "differentialenthalpy" economizer_type = 'DifferentialEnthalpy' elsif airloop_economizer_type.downcase == "differentialdrybulb" economizer_type = 'DifferentialDryBulb' else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.airLoopHVACOutdoorAirSystem', "The air loop economizer type #{airloop_economizer_type} is not recognized. Please make sure that the economizer being applied by the ECM is either a DifferentialEnthalpy or DifferentialDryBulb type. No economizer will be applied.") return end model.getAirLoopHVACs.sort.each do |air_loop| oa_sys = air_loop.airLoopHVACOutdoorAirSystem if oa_sys.is_initialized oa_sys = oa_sys.get oa_control = oa_sys.getControllerOutdoorAir oa_control.setEconomizerControlType(economizer_type) end end end
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Add equipment for ECM ‘hs08_ccashp_vrf’:
-Constant-volume DOAS with air-source heat pump for heating and cooling and electric backup -Zonal terminal VRF units connected to an outdoor VRF condenser unit -Zonal electric or hot-water backup
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 502 def add_ecm_hs08_ccashp_vrf( model:, system_zones_map:, system_doas_flags:, ecm_system_zones_map_option:, standard:, air_sys_eqpt_type: 'ccashp') # Get the heating fuel type from the system fuels object defined by the standards object heating_fuel = standard.fuel_type_set.ecm_fueltype # Create one hot-water loop for hot-water baseboards if required hw_loop = nil hw_loop = add_hotwater_loop(model: model, fuel_type_set: standard.fuel_type_set) if standard.fuel_type_set.baseboard_type == 'Hot Water' # Update system zones map if needed system_zones_map = update_system_zones_map_keys(system_zones_map,'sys_1') system_zones_map = update_system_zones_map(model,system_zones_map,ecm_system_zones_map_option,'sys_1') if ecm_system_zones_map_option != 'NECB_Default' # Add outdoor VRF unit outdoor_vrf_unit = add_outdoor_vrf_unit(model: model, ecm_name: 'hs08_ccashp_vrf') eqpt_name = 'Mitsubishi_Hyper_Heating_VRF_Outdoor_Unit' airconditioner_variablerefrigerantflow_cooling_apply_curves(outdoor_vrf_unit,eqpt_name) airconditioner_variablerefrigerantflow_heating_apply_curves(outdoor_vrf_unit,eqpt_name) # Update system doas flags system_doas_flags = {} system_zones_map.keys.each { |sname| system_doas_flags[sname] = true } # use system zones map and generate new air system and zonal equipment system_zones_map.sort.each do |sys_name, zones| sys_info = air_sys_comps_assumptions(sys_name: sys_name, zones: zones, system_doas_flags: system_doas_flags) sys_supp_htg_eqpt_type = 'coil_electric' sys_supp_htg_eqpt_type = 'coil_gas' if heating_fuel == 'NaturalGas' airloop,clg_dx_coil,htg_dx_coil,return_fan = add_air_system(model: model, zones: zones, sys_abbr: sys_info['sys_abbr'], sys_vent_type: sys_info['sys_vent_type'], sys_heat_rec_type: sys_info['sys_heat_rec_type'], sys_htg_eqpt_type: air_sys_eqpt_type, sys_supp_htg_eqpt_type: sys_supp_htg_eqpt_type, sys_clg_eqpt_type: air_sys_eqpt_type, sys_supp_fan_type: sys_info['sys_supp_fan_type'], sys_ret_fan_type: sys_info['sys_ret_fan_type'], sys_setpoint_mgr_type: sys_info['sys_setpoint_mgr_type']) # Appy performance curves if air_sys_eqpt_type == 'ccashp' eqpt_name = 'Mitsubishi_Hyper_Heating_VRF_Outdoor_Unit RTU' coil_cooling_dx_variable_speed_apply_curves(clg_dx_coil, eqpt_name) coil_heating_dx_variable_speed_apply_curves(htg_dx_coil, eqpt_name) elsif air_sys_eqpt_type == 'ashp' eqpt_name = 'NECB2015_ASHP' coil_cooling_dx_single_speed_apply_curves(clg_dx_coil, eqpt_name) coil_heating_dx_single_speed_apply_curves(htg_dx_coil, eqpt_name) else raise("add_ecm_hs08_ccashp_vrf: The air system equipment type is neither an ashp nor a ccashp") end # add zone equipment and diffuser # add terminal VRF units add_zone_eqpt(model: model, airloop: airloop, zones: zones, outdoor_unit: outdoor_vrf_unit, zone_diffuser_type: sys_info['zone_diffuser_type'], zone_htg_eqpt_type: 'vrf', zone_supp_htg_eqpt_type: 'none', zone_clg_eqpt_type: 'vrf', zone_fan_type: 'On_Off', hw_loop: hw_loop) # add electric or hot-water baseboards for backup; Type of baseboard follows the primary heating fuel used in the building model. zone_htg_eqpt_type = 'baseboard_hotwater' if standard.fuel_type_set.baseboard_type == 'Hot Water' zone_htg_eqpt_type = 'baseboard_electric' if standard.fuel_type_set.baseboard_type == 'Electric' add_zone_eqpt(model: model, airloop: airloop, zones: zones, outdoor_unit: nil, zone_diffuser_type: nil, zone_htg_eqpt_type: zone_htg_eqpt_type, zone_supp_htg_eqpt_type: 'none', zone_clg_eqpt_type: 'none', zone_fan_type: 'none', hw_loop: hw_loop) # Now we can find and apply maximum horizontal and vertical distances between outdoor vrf unit and zones with vrf terminal units max_hor_pipe_length, max_vert_pipe_length = get_max_vrf_pipe_lengths(model) outdoor_vrf_unit.setEquivalentPipingLengthusedforPipingCorrectionFactorinCoolingMode(max_hor_pipe_length) outdoor_vrf_unit.setEquivalentPipingLengthusedforPipingCorrectionFactorinHeatingMode(max_hor_pipe_length) outdoor_vrf_unit.setVerticalHeightusedforPipingCorrectionFactor(max_vert_pipe_length) end end
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Add equipment for ecm “hs09_ccashp_baseboard”:
-Constant-volume reheat system for single zone systems -VAV system with reheat for non DOAS multi-zone systems -Cold-climate air-source heat pump for heating and cooling with electric backup -Electric or hot-water baseboards
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 1218 def add_ecm_hs09_ccashp_baseboard(model:, system_zones_map:, # hash of ailoop names as keys and array of zones as values system_doas_flags:, # hash of system names as keys and flag for DOAS as values ecm_system_zones_map_option:, standard:) # Get the heating fuel type from the system fuels object defined by the standards object heating_fuel = standard.fuel_type_set.ecm_fueltype # Create one hot-water loop for hot-water baseboards if required hw_loop = nil hw_loop = add_hotwater_loop(model: model, fuel_type_set: standard.fuel_type_set) if standard.fuel_type_set.baseboard_type == 'Hot Water' # Set supplemental heating for air loop sys_supp_htg_eqpt_type = 'coil_electric' sys_supp_htg_eqpt_type = 'coil_gas' if heating_fuel == 'NaturalGas' systems = [] system_zones_map.sort.each do |sys_name, zones| sys_info = air_sys_comps_assumptions(sys_name: sys_name, zones: zones, system_doas_flags: system_doas_flags) # add airloop and its equipment airloop,clg_dx_coil,htg_dx_coil,return_fan = add_air_system( model: model, zones: zones, sys_abbr: sys_info['sys_abbr'], sys_vent_type: sys_info['sys_vent_type'], sys_heat_rec_type: sys_info['sys_heat_rec_type'], sys_htg_eqpt_type: 'ccashp', sys_supp_htg_eqpt_type: sys_supp_htg_eqpt_type, sys_clg_eqpt_type: 'ccashp', sys_supp_fan_type: sys_info['sys_supp_fan_type'], sys_ret_fan_type: sys_info['sys_ret_fan_type'], sys_setpoint_mgr_type: sys_info['sys_setpoint_mgr_type'] ) # Apply performance curves eqpt_name = 'Mitsubishi_Hyper_Heating_VRF_Outdoor_Unit RTU' coil_cooling_dx_variable_speed_apply_curves(clg_dx_coil, eqpt_name) coil_heating_dx_variable_speed_apply_curves(htg_dx_coil, eqpt_name) # add zone equipment and diffuser if sys_info['sys_vent_type'] == 'doas' zone_htg_eqpt_type = 'ptac_electric_off' zone_clg_eqpt_type = 'ptac_electric_off' zone_fan_type = 'on_off' else zone_htg_eqpt_type = 'baseboard_electric' if standard.fuel_type_set.baseboard_type == 'Electric' zone_htg_eqpt_type = 'baseboard_hotwater' if standard.fuel_type_set.baseboard_type == 'Hot Water' zone_clg_eqpt_type = 'none' zone_fan_type = 'none' end add_zone_eqpt(model: model, airloop: airloop, zones: zones, outdoor_unit: nil, zone_diffuser_type: sys_info['zone_diffuser_type'], zone_htg_eqpt_type: zone_htg_eqpt_type, zone_supp_htg_eqpt_type: 'none', zone_clg_eqpt_type: zone_clg_eqpt_type, zone_fan_type: zone_fan_type, hw_loop: hw_loop) # for doas use baseboard electric or hotwater as backup for PTAC units if sys_info['sys_vent_type'] == 'doas' zone_htg_eqpt_type = 'baseboard_electric' if standard.fuel_type_set.baseboard_type == 'Electric' zone_htg_eqpt_type = 'baseboard_hotwater' if standard.fuel_type_set.baseboard_type == 'Hot Water' add_zone_eqpt(model: model, airloop: airloop, zones: zones, outdoor_unit: nil, zone_diffuser_type: nil, zone_htg_eqpt_type: zone_htg_eqpt_type, zone_supp_htg_eqpt_type: 'none', zone_clg_eqpt_type: 'none', zone_fan_type: 'none', hw_loop: hw_loop) end return_fan.addToNode(airloop.returnAirNode.get) if return_fan systems << airloop end return systems end
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Add equipment for ECM “hs11_ashp_pthp”
-Constant volume DOAS with air-source heat pump for heating and cooling and electric backup -Packaged-Terminal air-source heat pumps with electric backup
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 1390 def add_ecm_hs11_ashp_pthp(model:, system_zones_map:, system_doas_flags:, ecm_system_zones_map_option:, standard:) hw_loop = nil # Get the heating fuel type from the system fuels object defined by the standards object heating_fuel = standard.fuel_type_set.ecm_fueltype # Set supplemental heaing for airloop sys_supp_htg_eqpt_type = 'coil_electric' sys_supp_htg_eqpt_type = 'coil_gas' if heating_fuel == 'NaturalGas' # Update system zones map if needed system_zones_map = update_system_zones_map_keys(system_zones_map,'sys_1') system_zones_map = update_system_zones_map(model,system_zones_map,ecm_system_zones_map_option,'sys_1') if ecm_system_zones_map_option != 'NECB_Default' # Update system doas flags system_doas_flags = {} system_zones_map.keys.each { |sname| system_doas_flags[sname] = true } # use system zones map and generate new air system and zonal equipment systems = [] system_zones_map.sort.each do |sys_name, zones| sys_info = air_sys_comps_assumptions(sys_name: sys_name, zones: zones, system_doas_flags: system_doas_flags) airloop,clg_dx_coil,htg_dx_coil,return_fan = add_air_system(model: model, zones: zones, sys_abbr: sys_info['sys_abbr'], sys_vent_type: sys_info['sys_vent_type'], sys_heat_rec_type: sys_info['sys_heat_rec_type'], sys_htg_eqpt_type: 'ashp', sys_supp_htg_eqpt_type: sys_supp_htg_eqpt_type, sys_clg_eqpt_type: 'ashp', sys_supp_fan_type: sys_info['sys_supp_fan_type'], sys_ret_fan_type: sys_info['sys_ret_fan_type'], sys_setpoint_mgr_type: sys_info['sys_setpoint_mgr_type']) eqpt_name = 'HS11_PTHP' coil_cooling_dx_single_speed_apply_curves(clg_dx_coil,eqpt_name) coil_heating_dx_single_speed_apply_curves(htg_dx_coil,eqpt_name) # add zone equipment and diffuser zone_htg_eqpt_type = 'pthp' zone_clg_eqpt_type = 'pthp' zone_supp_htg_eqpt_type = 'coil_electric' zone_fan_type = 'on_off' add_zone_eqpt(model: model, airloop: airloop, zones: zones, outdoor_unit: nil, zone_diffuser_type: sys_info['zone_diffuser_type'], zone_htg_eqpt_type: zone_htg_eqpt_type, zone_supp_htg_eqpt_type: zone_supp_htg_eqpt_type, zone_clg_eqpt_type: zone_clg_eqpt_type, zone_fan_type: zone_fan_type, hw_loop: hw_loop) zones.each do |zone| zone.equipment.each do |comp| if comp.to_ZoneHVACPackagedTerminalHeatPump.is_initialized if comp.to_ZoneHVACPackagedTerminalHeatPump.get.heatingCoil.to_CoilHeatingDXSingleSpeed.is_initialized htg_coil = comp.to_ZoneHVACPackagedTerminalHeatPump.get.heatingCoil.to_CoilHeatingDXSingleSpeed.get coil_heating_dx_single_speed_apply_curves(htg_coil,eqpt_name) end if comp.to_ZoneHVACPackagedTerminalHeatPump.get.coolingCoil.to_CoilCoolingDXSingleSpeed.is_initialized clg_coil = comp.to_ZoneHVACPackagedTerminalHeatPump.get.coolingCoil.to_CoilCoolingDXSingleSpeed.get coil_cooling_dx_single_speed_apply_curves(clg_coil,eqpt_name) end end end end return_fan.addToNode(airloop.returnAirNode.get) if return_fan systems << airloop end return systems end
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Add equipment for ecm “hs12_ashp_baseboard”:
-Constant-volume reheat system for single zone systems -VAV system with reheat for non DOAS multi-zone systems -Air-source heat pump for heating and cooling with electric backup -Electric or hot-water baseboards
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 1536 def add_ecm_hs12_ashp_baseboard(model:, system_zones_map:, system_doas_flags:, ecm_system_zones_map_option:, standard:) # Get the heating fuel type from the system fuels object defined by the standards object heating_fuel = standard.fuel_type_set.ecm_fueltype # Create one hot-water loop for hot-water baseboards if required hw_loop = nil hw_loop = add_hotwater_loop(model: model, fuel_type_set: standard.fuel_type_set) if standard.fuel_type_set.baseboard_type == 'Hot Water' # Set supplemental heating fuel for airloop sys_supp_htg_eqpt_type = 'coil_electric' sys_supp_htg_eqpt_type = 'coil_gas' if heating_fuel == 'NaturalGas' systems = [] system_zones_map.sort.each do |sys_name, zones| sys_info = air_sys_comps_assumptions(sys_name: sys_name, zones: zones, system_doas_flags: system_doas_flags) # add air loop and its equipment airloop,clg_dx_coil,htg_dx_coil,return_fan = add_air_system(model: model, zones: zones, sys_abbr: sys_info['sys_abbr'], sys_vent_type: sys_info['sys_vent_type'], sys_heat_rec_type: sys_info['sys_heat_rec_type'], sys_htg_eqpt_type: 'ashp', sys_supp_htg_eqpt_type: sys_supp_htg_eqpt_type, sys_clg_eqpt_type: 'ashp', sys_supp_fan_type: sys_info['sys_supp_fan_type'], sys_ret_fan_type: sys_info['sys_ret_fan_type'], sys_setpoint_mgr_type: sys_info['sys_setpoint_mgr_type']) eqpt_name = 'NECB2015_ASHP' coil_cooling_dx_single_speed_apply_curves(clg_dx_coil,eqpt_name) coil_heating_dx_single_speed_apply_curves(htg_dx_coil,eqpt_name) # add zone equipment and diffuser if sys_info['sys_vent_type'] == 'doas' zone_htg_eqpt_type = 'ptac_electric_off' zone_clg_eqpt_type = 'ptac_electric_off' zone_fan_type = 'on_off' else zone_htg_eqpt_type = 'baseboard_electric' if standard.fuel_type_set.baseboard_type == 'Electric' zone_htg_eqpt_type = 'baseboard_hotwater' if standard.fuel_type_set.baseboard_type == 'Hot Water' zone_clg_eqpt_type = 'none' zone_fan_type = 'none' end add_zone_eqpt(model: model, airloop: airloop, zones: zones, outdoor_unit: nil, zone_diffuser_type: sys_info['zone_diffuser_type'], zone_htg_eqpt_type: zone_htg_eqpt_type, zone_supp_htg_eqpt_type: 'none', zone_clg_eqpt_type: zone_clg_eqpt_type, zone_fan_type: zone_fan_type, hw_loop: hw_loop) # for doas use baseboard electric or hotwater as backup for PTAC units if sys_info['sys_vent_type'] == 'doas' zone_htg_eqpt_type = 'baseboard_electric' if standard.fuel_type_set.baseboard_type == 'Electric' zone_htg_eqpt_type = 'baseboard_hotwater' if standard.fuel_type_set.baseboard_type == 'Hot Water' add_zone_eqpt(model: model, airloop: airloop, zones: zones, outdoor_unit: nil, zone_diffuser_type: nil, zone_htg_eqpt_type: zone_htg_eqpt_type, zone_supp_htg_eqpt_type: 'none', zone_clg_eqpt_type: 'none', zone_fan_type: 'none', hw_loop: hw_loop) end return_fan.addToNode(airloop.returnAirNode.get) if return_fan systems << airloop end return systems end
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Add equipment for ecm “hs13_ashp_vrf”:
-Constant-volume dedicated-outside air system -Air-source heat pump for heating and cooling with electric backup -Zonal VRF terminal units for heating and cooling with electric baseboards
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 1690 def add_ecm_hs13_ashp_vrf(model:, system_zones_map:, system_doas_flags:, ecm_system_zones_map_option:, standard:) # call method for ECM hs08 with ASHP in the air system add_ecm_hs08_ccashp_vrf(model: model, system_zones_map: system_zones_map, system_doas_flags: system_doas_flags, ecm_system_zones_map_option: ecm_system_zones_map_option, standard: standard, air_sys_eqpt_type: 'ashp') end
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Add equipment for ECM “hs14_cgshp_fancoils”
-Constant volume DOAS with hydronic htg and clg coils. -Zonal terminal fan coil (4-pipe) connected to central ground-source heat pump. -Plant has a heating loop with water-to-water heat pump with a backup boiler. It also has a water-cooled chiller with a backup air-cooled chiller. Water-source heat pump and water-cooled chiller are connected to a ground-loop.
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 1717 def add_ecm_hs14_cgshp_fancoils(model:, system_zones_map:, system_doas_flags:, ecm_system_zones_map_option:, standard:) # Get the heating fuel type from the system fuels object defined by the standards object heating_fuel = standard.fuel_type_set.ecm_fueltype # Set supplemental heaing for airloop sys_supp_htg_eqpt_type = 'coil_electric' sys_supp_htg_eqpt_type = 'coil_gas' if heating_fuel == 'NaturalGas' # Update system zones map if needed system_zones_map = update_system_zones_map_keys(system_zones_map,'sys_1') system_zones_map = update_system_zones_map(model,system_zones_map,ecm_system_zones_map_option,'sys_1') if ecm_system_zones_map_option != 'NECB_Default' # Update system doas flags system_doas_flags = {} system_zones_map.keys.each { |sname| system_doas_flags[sname] = true } # use system zones map and generate new air system and zonal equipment systems = [] system_zones_map.sort.each do |sys_name, zones| sys_info = air_sys_comps_assumptions(sys_name: sys_name, zones: zones, system_doas_flags: system_doas_flags) airloop,clg_coil,htg_coil,return_fan = add_air_system(model: model, zones: zones, sys_abbr: sys_info['sys_abbr'], sys_vent_type: sys_info['sys_vent_type'], sys_heat_rec_type: sys_info['sys_heat_rec_type'], sys_htg_eqpt_type: 'coil_hw', sys_supp_htg_eqpt_type: 'none', sys_clg_eqpt_type: 'coil_chw', sys_supp_fan_type: sys_info['sys_supp_fan_type'], sys_ret_fan_type: sys_info['sys_ret_fan_type'], sys_setpoint_mgr_type: 'warmest') # add zone equipment and diffuser zone_htg_eqpt_type = 'fancoil_4pipe' zone_clg_eqpt_type = 'fancoil_4pipe' zone_supp_htg_eqpt_type = 'none' zone_fan_type = 'on_off' add_zone_eqpt(model: model, airloop: airloop, zones: zones, outdoor_unit: nil, zone_diffuser_type: sys_info['zone_diffuser_type'], zone_htg_eqpt_type: zone_htg_eqpt_type, zone_supp_htg_eqpt_type: zone_supp_htg_eqpt_type, zone_clg_eqpt_type: zone_clg_eqpt_type, zone_fan_type: zone_fan_type) return_fan.addToNode(airloop.returnAirNode.get) if return_fan systems << airloop end # add hot-water loop hw_loop,hw_loop_htg_eqpt = add_plantloop(model: model, loop_htg_eqpt_type: 'HeatPump_WaterToWater_EquationFit', loop_clg_eqpt_type: 'none', loop_heat_rej_eqpt_type: 'none', loop_pump_type: 'variable_speed', loop_spm_type: 'Scheduled', loop_setpoint: 50.0, loop_temp_diff: 5.0) model.getCoilHeatingWaters.sort.each {|coil| hw_loop.addDemandBranchForComponent(coil)} hcapf_curve_name = "HEATPUMP_WATERTOWATER_HCAPF" hcapf_curve = model_add_curve(model, hcapf_curve_name) if hcapf_curve hw_loop_htg_eqpt.setHeatingCapacityCurve(hcapf_curve) else raise("Can not find curve hcapf for #{hw_loop_htg_eqpt.name}") end hpowerf_curve_name = "HEATPUMP_WATERTOWATER_HPOWERF" hpowerf_curve = model_add_curve(model, hpowerf_curve_name) if hpowerf_curve hw_loop_htg_eqpt.setHeatingCompressorPowerCurve(hpowerf_curve) else raise("Can not find curve hpowerf for #{hw_loop_htg_eqpt.name}") end boiler = OpenStudio::Model::BoilerHotWater.new(model) boiler.setFuelType(heating_fuel) hw_loop_htg_eqpt_outlet_node = hw_loop_htg_eqpt.supplyOutletModelObject.get.to_Node.get boiler.addToNode(hw_loop_htg_eqpt_outlet_node) # add chilled-water loop chw_loop,chw_loop_clg_eqpt = add_plantloop(model: model, loop_htg_eqpt_type: 'none', loop_clg_eqpt_type: 'chiller_electric_eir', loop_heat_rej_eqpt_type: 'none', loop_pump_type: 'variable_speed', loop_spm_type: 'Scheduled', loop_setpoint: 7.0, loop_temp_diff: 6.0) chw_loop_clg_eqpt.setName('ChillerWaterCooled') chw_loop_clg_eqpt.setCondenserType("WaterCooled") model.getCoilCoolingWaters.sort.each {|coil| chw_loop.addDemandBranchForComponent(coil)} sec_chiller = OpenStudio::Model::ChillerElectricEIR.new(model) chw_loop_clg_eqpt_outlet_node = chw_loop_clg_eqpt.supplyOutletModelObject.get.to_Node.get sec_chiller.addToNode(chw_loop_clg_eqpt_outlet_node) sec_chiller.setName('ChillerAirCooled') # add ground HX loop with district heating and cooling plant to represent the ground HX heat_rej_loop,heat_rej_loop_eqpt = add_plantloop(model: model, loop_htg_eqpt_type: 'none', loop_clg_eqpt_type: 'none', loop_heat_rej_eqpt_type: 'District_Heating', loop_pump_type: 'variable_speed', loop_spm_type: 'none', loop_setpoint: 'none', loop_temp_diff: 10.0) heat_rej_loop_eqpt.setName('DistrictHeating GLHX') htg_eqpt_outlet_node = heat_rej_loop_eqpt.outletModelObject.get.to_Node.get clg_eqpt = create_plantloop_clg_eqpt(model, 'District_Cooling') clg_eqpt.setName('DistrictCooling GLHX') clg_eqpt.addToNode(htg_eqpt_outlet_node) htg_spm = create_plantloop_spm( model, 'Scheduled', 5.0) htg_spm.addToNode(htg_eqpt_outlet_node) clg_eqpt_outlet_node = clg_eqpt.outletModelObject.get.to_Node.get clg_spm = create_plantloop_spm( model, 'Scheduled', 25.0) clg_spm.addToNode(heat_rej_loop.supplyOutletNode) heat_rej_loop.setName("#{heat_rej_loop.name.to_s} GLHX") heat_rej_loop.addDemandBranchForComponent(hw_loop_htg_eqpt) heat_rej_loop.addDemandBranchForComponent(chw_loop_clg_eqpt) # add output variables for district heating and cooling model.getOutputVariables.each {|ivar| ivar.remove} dist_htg_var = OpenStudio::Model::OutputVariable.new("District Heating Water Rate",model) dist_htg_var.setReportingFrequency("hourly") dist_htg_var.setKeyValue("*") dist_clg_var = OpenStudio::Model::OutputVariable.new("District Cooling Water Rate",model) dist_clg_var.setReportingFrequency("hourly") dist_clg_var.setKeyValue("*") return systems end
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Despite the name, this method does not actually remove any air loops. All air loops, hot water loops, cooling and any existing baseboard heaters should already be gone. The name is an artifact of the way ECM methods are named and used. With everything gone, this method adds a hot water loop (if required) and baseboard heating back in to all zones requiring heating. Originally, code was included in the ‘apply_systems’ method which would prevent the air loops and other stuff from being created if someone did not want them. But others felt that that was not a clear way of doing things and did not feel the performance penalty of creating objects, then removing them, then creating them again was significant.
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 3503 def add_ecm_remove_airloops_add_zone_baseboards(model:, system_zones_map:, system_doas_flags: nil, ecm_system_zones_map_option:, standard:) # Set the primary fuel set to default to to specific fuel type. standards_info = standard.standards_data # Assign fuel sources. boiler_fueltype = standard.fuel_type_set.boiler_fueltype backup_boiler_fueltype = standard.fuel_type_set.backup_boiler_fueltype baseboard_type = standard.fuel_type_set.baseboard_type mau_heating_coil_type = 'none' # Create the hot water loop if necessary. hw_loop = standard.create_hw_loop_if_required( baseboard_type, boiler_fueltype, backup_boiler_fueltype, mau_heating_coil_type, model ) # Add baseboard heaters to each heated zone. system_zones_map.sort.each do |sname, zones| zones.each do |zone| standard.add_zone_baseboards(baseboard_type: baseboard_type, hw_loop: hw_loop, model: model, zone: zone) end end end
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Add one hot-water loop for hot-water baseboards if required
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 3680 def add_hotwater_loop(model:, fuel_type_set:) primary_boiler_fueltype = fuel_type_set.boiler_fueltype backup_boiler_fueltype = fuel_type_set.backup_boiler_fueltype plant_loop_names = [] model.getPlantLoops.sort.each do |plant_loop| plant_loop_names << plant_loop.name.to_s end unless plant_loop_names.include? 'Hot Water Loop' hw_loop = OpenStudio::Model::PlantLoop.new(model) setup_hw_loop_with_components(model, hw_loop, primary_boiler_fueltype, backup_boiler_fueltype, model.alwaysOnDiscreteSchedule) end return hw_loop end
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Add an outdoor VRF unit
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 266 def add_outdoor_vrf_unit(model:, ecm_name: nil, condenser_type: 'AirCooled') outdoor_vrf_unit = OpenStudio::Model::AirConditionerVariableRefrigerantFlow.new(model) outdoor_vrf_unit.setName('VRF Outdoor Unit') outdoor_vrf_unit.setHeatPumpWasteHeatRecovery(true) outdoor_vrf_unit.setRatedHeatingCOP(4.0) outdoor_vrf_unit.setRatedCoolingCOP(4.0) outdoor_vrf_unit.setMinimumOutdoorTemperatureinHeatingMode(-25.0) outdoor_vrf_unit.setHeatingPerformanceCurveOutdoorTemperatureType('WetBulbTemperature') outdoor_vrf_unit.setMasterThermostatPriorityControlType('ThermostatOffsetPriority') outdoor_vrf_unit.setDefrostControl('OnDemand') outdoor_vrf_unit.setDefrostStrategy('ReverseCycle') outdoor_vrf_unit.autosizeResistiveDefrostHeaterCapacity outdoor_vrf_unit.setPipingCorrectionFactorforHeightinHeatingModeCoefficient(-0.00019231) outdoor_vrf_unit.setPipingCorrectionFactorforHeightinCoolingModeCoefficient(-0.00019231) outdoor_vrf_unit.setMinimumOutdoorTemperatureinHeatRecoveryMode(-5.0) outdoor_vrf_unit.setMaximumOutdoorTemperatureinHeatRecoveryMode(26.2) outdoor_vrf_unit.setInitialHeatRecoveryCoolingCapacityFraction(0.5) outdoor_vrf_unit.setHeatRecoveryCoolingCapacityTimeConstant(0.15) outdoor_vrf_unit.setInitialHeatRecoveryCoolingEnergyFraction(1.0) outdoor_vrf_unit.setHeatRecoveryCoolingEnergyTimeConstant(0.0) outdoor_vrf_unit.setInitialHeatRecoveryHeatingCapacityFraction(1.0) outdoor_vrf_unit.setHeatRecoveryHeatingCapacityTimeConstant(0.15) outdoor_vrf_unit.setInitialHeatRecoveryHeatingEnergyFraction(1.0) outdoor_vrf_unit.setHeatRecoveryCoolingEnergyTimeConstant(0.0) outdoor_vrf_unit.setMinimumHeatPumpPartLoadRatio(0.5) outdoor_vrf_unit.setCondenserType(condenser_type) outdoor_vrf_unit.setCrankcaseHeaterPowerperCompressor(1.0e-6) heat_defrost_eir_ft = nil if ecm_name search_criteria = {} search_criteria['name'] = 'Mitsubishi_Hyper_Heating_VRF_Outdoor_Unit' props = model_find_object(standards_data['tables']['heat_pump_heating_ecm']['table'], search_criteria, 1.0) heat_defrost_eir_ft = model_add_curve(model, props['heat_defrost_eir_ft']) end if heat_defrost_eir_ft outdoor_vrf_unit.setDefrostEnergyInputRatioModifierFunctionofTemperatureCurve(heat_defrost_eir_ft) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.AirConditionerVariableRefrigerantFlow', "For #{outdoor_vrf_unit.name}, cannot find heat_defrost_eir_ft curve, will not be set.") end return outdoor_vrf_unit end
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add plant loop with all its components
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 1128 def add_plantloop(model:, loop_htg_eqpt_type:, loop_clg_eqpt_type:, loop_heat_rej_eqpt_type:, loop_pump_type:, loop_spm_type:, loop_setpoint:, loop_temp_diff:) # create all the needed components and the plant loop plantloop = OpenStudio::Model::PlantLoop.new(model) spm = create_plantloop_spm(model, loop_spm_type, loop_setpoint) pump = create_plantloop_pump(model, loop_pump_type) htg_eqpt = create_plantloop_htg_eqpt(model, loop_htg_eqpt_type) clg_eqpt = create_plantloop_clg_eqpt(model, loop_clg_eqpt_type) heat_rej_eqpt = create_plantloop_heat_rej_eqpt(model, loop_heat_rej_eqpt_type) if heat_rej_eqpt.nil? if !htg_eqpt.nil? plantloop.sizingPlant.setLoopType('Heating') plantloop.setName("HW PlantLoop") eqpt = htg_eqpt elsif !clg_eqpt.nil? plantloop.sizingPlant.setLoopType('Cooling') plantloop.setName("CHW PlantLoop") eqpt = clg_eqpt end elsif !heat_rej_eqpt.nil? plantloop.sizingPlant.setLoopType('Condenser') plantloop.setName("Condenser PlantLoop") eqpt = heat_rej_eqpt end plantloop.sizingPlant.setDesignLoopExitTemperature(loop_setpoint) if loop_setpoint != 'none' plantloop.sizingPlant.setLoopDesignTemperatureDifference(loop_temp_diff) if loop_temp_diff != 'none' bypass_pipe = OpenStudio::Model::PipeAdiabatic.new(model) supply_outlet_pipe = OpenStudio::Model::PipeAdiabatic.new(model) supply_inlet_node = plantloop.supplyInletNode supply_outlet_node = plantloop.supplyOutletNode pump.addToNode(supply_inlet_node) plantloop.addSupplyBranchForComponent(eqpt) plantloop.addSupplyBranchForComponent(bypass_pipe) supply_outlet_pipe.addToNode(supply_outlet_node) spm.addToNode(supply_outlet_node) if loop_spm_type != 'none' return plantloop,eqpt end
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add zonal heating and cooling equipment
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 963 def add_zone_eqpt(model:, airloop:, zones:, outdoor_unit:, zone_diffuser_type:, zone_htg_eqpt_type:, zone_supp_htg_eqpt_type:, zone_clg_eqpt_type:, zone_fan_type:, hw_loop: nil) always_on = model.alwaysOnDiscreteSchedule zones.sort.each do |zone| # during the first call to this method for a zone, the diffuser type has to be specified if there is an air loop serving the zone if zone_diffuser_type zone.sizingZone.setZoneCoolingDesignSupplyAirTemperature(13.0) zone.sizingZone.setZoneHeatingDesignSupplyAirTemperature(43.0) zone.sizingZone.setZoneCoolingSizingFactor(1.1) zone.sizingZone.setZoneHeatingSizingFactor(1.3) diffuser = create_zone_diffuser(model, zone_diffuser_type, zone) airloop.removeBranchForZone(zone) airloop.addBranchForZone(zone, diffuser.to_StraightComponent) end clg_eqpt = create_zone_clg_eqpt(model, zone_clg_eqpt_type) htg_eqpt = create_zone_htg_eqpt(model, zone_htg_eqpt_type, hw_loop) supp_htg_eqpt = create_zone_htg_eqpt(model, zone_supp_htg_eqpt_type, hw_loop) fan = create_air_sys_fan(model, zone_fan_type) # for container zonal equipment call method "create_zone_container_equipment" this_is_container_comp = false if (zone_htg_eqpt_type == 'pthp') || (zone_htg_eqpt_type == 'vrf') || (zone_htg_eqpt_type.include? 'unitheater') || (zone_htg_eqpt_type.include? 'ptac') || (zone_htg_eqpt_type.include? 'fancoil') this_is_container_comp = true zone_cont_eqpt = create_zone_container_eqpt(model: model, zone_cont_eqpt_type: zone_htg_eqpt_type, zone_htg_eqpt: htg_eqpt, zone_supp_htg_eqpt: supp_htg_eqpt, zone_clg_eqpt: clg_eqpt, zone_fan: fan) end if zone_cont_eqpt zone_cont_eqpt.addToThermalZone(zone) outdoor_unit.addTerminal(zone_cont_eqpt) if outdoor_unit elsif htg_eqpt && !this_is_container_comp htg_eqpt.addToThermalZone(zone) end end sys_name_zone_htg_eqpt_type = zone_htg_eqpt_type sys_name_zone_htg_eqpt_type = 'b-e' if zone_htg_eqpt_type == 'baseboard_electric' || zone_htg_eqpt_type == 'ptac_electric_off' sys_name_zone_htg_eqpt_type = 'b-hw' if zone_htg_eqpt_type == 'baseboard_hotwater' sys_name_zone_clg_eqpt_type = zone_clg_eqpt_type sys_name_zone_clg_eqpt_type = 'ptac' if zone_clg_eqpt_type == 'ptac_electric_off' update_sys_name(airloop, zone_htg: sys_name_zone_htg_eqpt_type, zone_clg: sys_name_zone_clg_eqpt_type) if zone_diffuser_type end
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Set assumptions for type of components for air system based on the number of zones served by the system and whether it’s a mixed or doas.
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 1177 def air_sys_comps_assumptions(sys_name:, zones:, system_doas_flags:) sys_info = {} sys_info['sys_abbr'] = sys_name.split('|')[0] sys_info['sys_vent_type'] = 'mixed' sys_info['sys_vent_type'] = 'doas' if system_doas_flags[sys_name.to_s] sys_info['sys_heat_rec_type'] = 'none' sys_info['sys_htg_eqpt_type'] = 'coil_electric' sys_info['sys_supp_htg_eqpt_type'] = 'none' sys_info['sys_clg_eqpt_type'] = 'coil_dx' if (zones.size == 1) || (sys_info['sys_abbr'] == 'sys_4') sys_info['sys_setpoint_mgr_type'] = 'single_zone_reheat' sys_info['sys_setpoint_mgr_type'] = 'scheduled' if system_doas_flags[sys_name.to_s] sys_info['sys_supp_fan_type'] = 'constant_volume' sys_info['sys_ret_fan_type'] = 'none' sys_info['zone_diffuser_type'] = 'single_duct_uncontrolled' elsif zones.size > 1 if system_doas_flags[sys_name.to_s] sys_info['sys_setpoint_mgr_type'] = 'scheduled' sys_info['sys_supp_fan_type'] = 'constant_volume' sys_info['sys_ret_fan_type'] = 'none' sys_info['zone_diffuser_type'] = 'single_duct_uncontrolled' else sys_info['sys_setpoint_mgr_type'] = 'warmest' sys_info['sys_supp_fan_type'] = 'variable_volume' sys_info['sys_ret_fan_type'] = 'variable_volume' sys_info['zone_diffuser_type'] = 'single_duct_vav_reheat' end end return sys_info end
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Find cooling efficiency for “AirConditionerVariableRefrigerantFlow” object
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 2891 def airconditioner_variablerefrigerantflow_cooling_apply_cop(airconditioner_variablerefrigerantflow, search_criteria, rename = false) capacity_w = airconditioner_variablerefrigerantflow_cooling_find_capacity(airconditioner_variablerefrigerantflow) capacity_btu_per_hr = OpenStudio.convert(capacity_w, 'W', 'Btu/hr').get capacity_kbtu_per_hr = OpenStudio.convert(capacity_w, 'W', 'kBtu/hr').get # Look up the efficiency characteristics props = model_find_object(standards_data['tables']['heat_pump_cooling_ecm'], search_criteria, capacity_btu_per_hr) # Check to make sure properties were found if props.nil? OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.AirConditionerVariableRefrigerantFlow', "For #{airconditioner_variablerefrigerantflow.name}, cannot find efficiency info using #{search_criteria}.") successfully_set_all_properties = false return successfully_set_all_properties end # Get the minimum efficiency cop = nil # If specified as EER unless props['minimum_energy_efficiency_ratio'].nil? min_eer = props['minimum_energy_efficiency_ratio'] cop = eer_to_cop_no_fan(min_eer) new_comp_name = "#{airconditioner_variablerefrigerantflow.name} #{capacity_kbtu_per_hr.round}kBtu/hr #{min_eer}EER" OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirConditionerVariableRefrigerantFlow', "For #{template}: #{airconditioner_variablerefrigerantflow.name}: Capacity = #{capacity_kbtu_per_hr.round}kBtu/hr; EER = #{min_eer}") end # if specified as HSPF (heat pump) unless props['minimum_heating_seasonal_performance_factor'].nil? min_hspf = props['minimum_heating_seasonal_performance_factor'] cop = hspf_to_cop_no_fan(min_hspf) new_comp_name = "#{coil_heating_dx_variable_speed.name} #{capacity_kbtu_per_hr.round}kBtu/hr #{min_seer}HSPF" OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirConditionerVariableRefrigerantFlow', "For #{template}: #{airconditioner_variablerefrigerantflow.name}: Capacity = #{capacity_kbtu_per_hr.round}kBtu/hr; SEER = #{min_seer}") end # If specified as EER (heat pump) unless props['minimum_full_load_efficiency'].nil? min_eer = props['minimum_full_load_efficiency'] cop = eer_to_cop_no_fan(min_eer) new_comp_name = "#{airconditioner_variablerefrigerantflow.name} #{capacity_kbtu_per_hr.round}kBtu/hr #{min_eer}EER" OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirConditionerVariableRefrigerantFlow', "For #{template}: #{airconditioner_variablerefrigerantflow.name}: Capacity = #{capacity_kbtu_per_hr.round}kBtu/hr; EER = #{min_eer}") end # If specified as COP unless props['minimum_coefficient_of_performance_cooling'].nil? cop = props['minimum_coefficient_of_performance_cooling'] new_comp_name = "#{airconditioner_variablerefrigerantflow.name} #{capacity_kbtu_per_hr.round}kBtu/hr #{cop}COP" OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirConditionerVariableRefrigerantFlow', "For #{template}: #{airconditioner_variablerefrigerantflow.name}: Capacity = #{capacity_kbtu_per_hr.round}kBtu/hr; EER = #{min_eer}") end # Rename if rename airconditioner_variablerefrigerantflow.setName(new_comp_name) end # Set COP airconditioner_variablerefrigerantflow.setRatedCoolingCOP(cop.to_f) unless cop.nil? end
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Applies the cooling performance curves to “AirConditionerVariableRefrigerantFlow” object.
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 2364 def airconditioner_variablerefrigerantflow_cooling_apply_curves(airconditioner_variablerefrigerantflow, eqpt_name) successfully_set_all_properties = true search_criteria = {} search_criteria['name'] = eqpt_name # Get the capacity capacity_w = airconditioner_variablerefrigerantflow_cooling_find_capacity(airconditioner_variablerefrigerantflow) capacity_w = [1.0,capacity_w].max capacity_btu_per_hr = OpenStudio.convert(capacity_w, 'W', 'Btu/hr').get # Lookup performance curves props = model_find_object(standards_data['tables']['heat_pump_cooling_ecm']['table'], search_criteria, capacity_btu_per_hr) # Check to make sure properties were found if props.nil? OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standard.AirConditionerVariableRefrigerantFlow', "For #{airconditioner_variablerefrigerantflow.name}, cannot find efficiency info using #{search_criteria}, cannot apply efficiency.") successfully_set_all_properties = false end # Make the COOL-CAP-FT Low curve cool_cap_ft_low = model_add_curve(airconditioner_variablerefrigerantflow.model, props['cool_cap_ft_low']) if cool_cap_ft_low airconditioner_variablerefrigerantflow.setCoolingCapacityRatioModifierFunctionofLowTemperatureCurve(cool_cap_ft_low) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standard.AirConditionerVariableRefrigerantFlow', "For #{airconditioner_variablerefrigerantflow.name}, cannot find cool_cap_ft_low curve, will not be set.") successfully_set_all_properties = false end # Make the COOL-CAP-FT boundary curve cool_cap_ft_boundary = model_add_curve(airconditioner_variablerefrigerantflow.model, props['cool_cap_ft_boundary']) if cool_cap_ft_boundary airconditioner_variablerefrigerantflow.setCoolingCapacityRatioBoundaryCurve(cool_cap_ft_boundary) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standard.AirConditionerVariableRefrigerantFlow', "For #{airconditioner_variablerefrigerantflow.name}, cannot find cool_cap_ft_boundary curve, will not be set.") successfully_set_all_properties = false end # Make the COOL-CAP-FT high curve cool_cap_ft_high = model_add_curve(airconditioner_variablerefrigerantflow.model, props['cool_cap_ft_high']) if cool_cap_ft_high airconditioner_variablerefrigerantflow.setCoolingCapacityRatioModifierFunctionofHighTemperatureCurve(cool_cap_ft_high) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.AirConditionerVariableRefrigerantFlow', "For #{airconditioner_variablerefrigerantflow.name}, cannot find cool_cap_ft_high curve, will not be set.") successfully_set_all_properties = false end # Make the COOL-EIR-FT low curve cool_eir_ft_low = model_add_curve(airconditioner_variablerefrigerantflow.model, props['cool_eir_ft_low']) if cool_eir_ft_low airconditioner_variablerefrigerantflow.setCoolingEnergyInputRatioModifierFunctionofLowTemperatureCurve(cool_eir_ft_low) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.AirConditionerVariableRefrigerantFlow', "For #{airconditioner_variablerefrigerantflow.name}, cannot find cool_eir_ft_low curve, will not be set.") successfully_set_all_properties = false end # Make the COOL-EIR-FT boundary curve cool_eir_ft_boundary = model_add_curve(airconditioner_variablerefrigerantflow.model, props['cool_eir_ft_boundary']) if cool_eir_ft_boundary airconditioner_variablerefrigerantflow.setCoolingEnergyInputRatioBoundaryCurve(cool_eir_ft_boundary) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.AirConditionerVariableRefrigerantFlow', "For #{airconditioner_variablerefrigerantflow.name}, cannot find cool_eir_ft_boundary curve, will not be set.") successfully_set_all_properties = false end # Make the COOL-EIR-FT high curve cool_eir_ft_high = model_add_curve(airconditioner_variablerefrigerantflow.model, props['cool_eir_ft_high']) if cool_eir_ft_high airconditioner_variablerefrigerantflow.setCoolingEnergyInputRatioModifierFunctionofHighTemperatureCurve(cool_eir_ft_high) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.AirConditionerVariableRefrigerantFlow', "For #{airconditioner_variablerefrigerantflow.name}, cannot find cool_eir_ft_high curve, will not be set.") successfully_set_all_properties = false end # Make the COOL-EIR-FPLR low curve cool_eir_fplr_low = model_add_curve(airconditioner_variablerefrigerantflow.model, props['cool_eir_fplr_low']) if cool_eir_fplr_low airconditioner_variablerefrigerantflow.setCoolingEnergyInputRatioModifierFunctionofLowPartLoadRatioCurve(cool_eir_fplr_low) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.AirConditionerVariableRefrigerantFlow', "For #{airconditioner_variablerefrigerantflow.name}, cannot find cool_eir_fplr_low curve, will not be set.") successfully_set_all_properties = false end # Make the COOL-EIR-FPLR high curve cool_eir_fplr_high = model_add_curve(airconditioner_variablerefrigerantflow.model, props['cool_eir_fplr_high']) if cool_eir_fplr_high airconditioner_variablerefrigerantflow.setCoolingEnergyInputRatioModifierFunctionofHighPartLoadRatioCurve(cool_eir_fplr_high) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.AirConditionerVariableRefrigerantFlow', "For #{airconditioner_variablerefrigerantflow.name}, cannot find cool_eir_fplr_high curve, will not be set.") successfully_set_all_properties = false end # Make the COOL-CCR curve cool_ccr = model_add_curve(airconditioner_variablerefrigerantflow.model, props['cool_ccr']) if cool_ccr airconditioner_variablerefrigerantflow.setCoolingCombinationRatioCorrectionFactorCurve(cool_ccr) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.AirConditionerVariableRefrigerantFlow', "For #{airconditioner_variablerefrigerantflow.name}, cannot find cool_ccr curve, will not be set.") successfully_set_all_properties = false end # Make the COOL-PLF-FPLR curve cool_plf_fplr = model_add_curve(airconditioner_variablerefrigerantflow.model, props['cool_plf_fplr']) if cool_plf_fplr airconditioner_variablerefrigerantflow.setCoolingPartLoadFractionCorrelationCurve(cool_plf_fplr) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.AirConditionerVariableRefrigerantFlow', "For #{airconditioner_variablerefrigerantflow.name}, cannot find cool_plf_fplr curve, will not be set.") successfully_set_all_properties = false end # Make the COOL-PLF-FPLR curve cool_plf_fplr = model_add_curve(airconditioner_variablerefrigerantflow.model, props['cool_plf_fplr']) if cool_plf_fplr airconditioner_variablerefrigerantflow.setCoolingPartLoadFractionCorrelationCurve(cool_plf_fplr) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.AirConditionerVariableRefrigerantFlow', "For #{airconditioner_variablerefrigerantflow.name}, cannot find cool_plf_fplr curve, will not be set.") successfully_set_all_properties = false end # Make the COOL-CAP-FPL curve cool_cap_fpl = model_add_curve(airconditioner_variablerefrigerantflow.model, props['cool_cap_fpl']) if cool_cap_fpl airconditioner_variablerefrigerantflow.setPipingCorrectionFactorforLengthinCoolingModeCurve(cool_cap_fpl) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.AirConditionerVariableRefrigerantFlow', "For #{airconditioner_variablerefrigerantflow.name}, cannot find cool_cap_fpl curve, will not be set.") successfully_set_all_properties = false end end
¶ ↑
Find cooling capacity for “AirConditionerVariableRefrigerantFlow” object
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 3052 def airconditioner_variablerefrigerantflow_cooling_find_capacity(airconditioner_variablerefrigerantflow) capacity_w = nil if airconditioner_variablerefrigerantflow.ratedTotalCoolingCapacity.is_initialized capacity_w = airconditioner_variablerefrigerantflow.ratedTotalCoolingCapacity.get elsif airconditioner_variablerefrigerantflow.autosizedRatedTotalCoolingCapacity.is_initialized capacity_w = airconditioner_variablerefrigerantflow.autosizedRatedTotalCoolingCapacity.get airconditioner_variablerefrigerantflow.setRatedTotalCoolingCapacity(capacity_w) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.AirConditionerVariableRefrigerantFlow', "For #{airconditioner_variablerefrigerantflow.name} cooling capacity is not available.") return 0.0 end return capacity_w end
¶ ↑
Find heating efficiency for “AirConditionerVariableRefrigerantFlow” object
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 2955 def airconditioner_variablerefrigerantflow_heating_apply_cop(airconditioner_variablerefrigerantflow, search_criteria, rename = false) capacity_w = airconditioner_variablerefrigerantflow_heating_find_capacity(airconditioner_variablerefrigerantflow) capacity_btu_per_hr = OpenStudio.convert(capacity_w, 'W', 'Btu/hr').get capacity_kbtu_per_hr = OpenStudio.convert(capacity_w, 'W', 'kBtu/hr').get # Look up the efficiency characteristics props = model_find_object(standards_data['tables']['heat_pump_heating_ecm'], search_criteria, capacity_btu_per_hr) # Check to make sure properties were found if props.nil? OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.AirConditionerVariableRefrigerantFlow', "For #{airconditioner_variablerefrigerantflow.name}, cannot find heating efficiency info using #{search_criteria}.") successfully_set_all_properties = false return successfully_set_all_properties end # Get the minimum efficiency cop = nil # If specified as EER unless props['minimum_energy_efficiency_ratio'].nil? min_eer = props['minimum_energy_efficiency_ratio'] cop = eer_to_cop_no_fan(min_eer) new_comp_name = "#{airconditioner_variablerefrigerantflow.name} #{capacity_kbtu_per_hr.round}kBtu/hr #{min_eer}EER" OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirConditionerVariableRefrigerantFlow', "For #{template}: #{airconditioner_variablerefrigerantflow.name}: Capacity = #{capacity_kbtu_per_hr.round}kBtu/hr; EER = #{min_eer}") end # if specified as HSPF (heat pump) unless props['minimum_heating_seasonal_performance_factor'].nil? min_hspf = props['minimum_heating_seasonal_performance_factor'] cop = hspf_to_cop_no_fan(min_hspf) new_comp_name = "#{coil_heating_dx_variable_speed.name} #{capacity_kbtu_per_hr.round}kBtu/hr #{min_seer}HSPF" OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirConditionerVariableRefrigerantFlow', "For #{template}: #{airconditioner_variablerefrigerantflow.name}: Capacity = #{capacity_kbtu_per_hr.round}kBtu/hr; SEER = #{min_seer}") end # If specified as EER (heat pump) unless props['minimum_full_load_efficiency'].nil? min_eer = props['minimum_full_load_efficiency'] cop = eer_to_cop_no_fan(min_eer) new_comp_name = "#{airconditioner_variablerefrigerantflow.name} #{capacity_kbtu_per_hr.round}kBtu/hr #{min_eer}EER" OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirConditionerVariableRefrigerantFlow', "For #{template}: #{airconditioner_variablerefrigerantflow.name}: Capacity = #{capacity_kbtu_per_hr.round}kBtu/hr; EER = #{min_eer}") end # If specified as COP unless props['minimum_coefficient_of_performance_heating'].nil? min_cop = props['minimum_coefficient_of_performance_heating'] cop = cop_heating_to_cop_heating_no_fan(min_cop, capacity_w) new_comp_name = "#{airconditioner_variablerefrigerantflow.name} #{capacity_kbtu_per_hr.round}kBtu/hr #{cop}COP" OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.AirConditionerVariableRefrigerantFlow', "For #{template}: #{airconditioner_variablerefrigerantflow.name}: Capacity = #{capacity_kbtu_per_hr.round}kBtu/hr; EER = #{min_eer}") end # Rename if rename airconditioner_variablerefrigerantflow.setName(new_comp_name) end # Set COP airconditioner_variablerefrigerantflow.setRatedHeatingCOP(cop.to_f) unless cop.nil? end
¶ ↑
Applies the heating performance curves to “AirConditionerVariableRefrigerantFlow” object.
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 2495 def airconditioner_variablerefrigerantflow_heating_apply_curves(airconditioner_variablerefrigerantflow, eqpt_name) successfully_set_all_properties = true search_criteria = {} search_criteria['name'] = eqpt_name # Get the capacity capacity_w = airconditioner_variablerefrigerantflow_heating_find_capacity(airconditioner_variablerefrigerantflow) capacity_w = [1.0,capacity_w].max capacity_btu_per_hr = OpenStudio.convert(capacity_w, 'W', 'Btu/hr').get # Lookup performance curves props = model_find_object(standards_data['tables']['heat_pump_heating_ecm']['table'], search_criteria, capacity_btu_per_hr) # Check to make sure properties were found if props.nil? OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standard.AirConditionerVariableRefrigerantFlow', "For #{airconditioner_variablerefrigerantflow.name}, cannot find heating efficiency info using #{search_criteria}, cannot apply efficiency.") successfully_set_all_properties = false end # Make the HEAT-CAP-FT Low curve heat_cap_ft_low = model_add_curve(airconditioner_variablerefrigerantflow.model, props['heat_cap_ft_low']) if heat_cap_ft_low airconditioner_variablerefrigerantflow.setHeatingCapacityRatioModifierFunctionofLowTemperatureCurve(heat_cap_ft_low) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standard.AirConditionerVariableRefrigerantFlow', "For #{airconditioner_variablerefrigerantflow.name}, cannot find heat_cap_ft_low curve, will not be set.") successfully_set_all_properties = false end # Make the HEAT-CAP-FT boundary curve heat_cap_ft_boundary = model_add_curve(airconditioner_variablerefrigerantflow.model, props['heat_cap_ft_boundary']) if heat_cap_ft_boundary airconditioner_variablerefrigerantflow.setHeatingCapacityRatioBoundaryCurve(heat_cap_ft_boundary) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standard.AirConditionerVariableRefrigerantFlow', "For #{airconditioner_variablerefrigerantflow.name}, cannot find heat_cap_ft_boundary curve, will not be set.") successfully_set_all_properties = false end # Make the HEAT-CAP-FT high curve heat_cap_ft_high = model_add_curve(airconditioner_variablerefrigerantflow.model, props['heat_cap_ft_high']) if heat_cap_ft_high airconditioner_variablerefrigerantflow.setHeatingCapacityRatioModifierFunctionofHighTemperatureCurve(heat_cap_ft_high) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.AirConditionerVariableRefrigerantFlow', "For #{airconditioner_variablerefrigerantflow.name}, cannot find heat_cap_ft_high curve, will not be set.") successfully_set_all_properties = false end # Make the HEAT-EIR-FT low curve heat_eir_ft_low = model_add_curve(airconditioner_variablerefrigerantflow.model, props['heat_eir_ft_low']) if heat_eir_ft_low airconditioner_variablerefrigerantflow.setHeatingEnergyInputRatioModifierFunctionofLowTemperatureCurve(heat_eir_ft_low) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.AirConditionerVariableRefrigerantFlow', "For #{airconditioner_variablerefrigerantflow.name}, cannot find heat_eir_ft_low curve, will not be set.") successfully_set_all_properties = false end # Make the HEAT-EIR-FT boundary curve heat_eir_ft_boundary = model_add_curve(airconditioner_variablerefrigerantflow.model, props['heat_eir_ft_boundary']) if heat_eir_ft_boundary airconditioner_variablerefrigerantflow.setHeatingEnergyInputRatioBoundaryCurve(heat_eir_ft_boundary) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.AirConditionerVariableRefrigerantFlow', "For #{airconditioner_variablerefrigerantflow.name}, cannot find heat_eir_ft_boundary curve, will not be set.") successfully_set_all_properties = false end # Make the HEAT-EIR-FT high curve heat_eir_ft_high = model_add_curve(airconditioner_variablerefrigerantflow.model, props['heat_eir_ft_high']) if heat_eir_ft_high airconditioner_variablerefrigerantflow.setHeatingEnergyInputRatioModifierFunctionofHighTemperatureCurve(heat_eir_ft_high) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.AirConditionerVariableRefrigerantFlow', "For #{airconditioner_variablerefrigerantflow.name}, cannot find heat_eir_ft_high curve, will not be set.") successfully_set_all_properties = false end # Make the HEAT-EIR-FPLR low curve heat_eir_fplr_low = model_add_curve(airconditioner_variablerefrigerantflow.model, props['heat_eir_fplr_low']) if heat_eir_fplr_low airconditioner_variablerefrigerantflow.setHeatingEnergyInputRatioModifierFunctionofLowPartLoadRatioCurve(heat_eir_fplr_low) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.AirConditionerVariableRefrigerantFlow', "For #{airconditioner_variablerefrigerantflow.name}, cannot find heat_eir_fplr_low curve, will not be set.") successfully_set_all_properties = false end # Make the HEAT-EIR-FPLR high curve heat_eir_fplr_high = model_add_curve(airconditioner_variablerefrigerantflow.model, props['heat_eir_fplr_high']) if heat_eir_fplr_high airconditioner_variablerefrigerantflow.setHeatingEnergyInputRatioModifierFunctionofHighPartLoadRatioCurve(heat_eir_fplr_high) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.AirConditionerVariableRefrigerantFlow', "For #{airconditioner_variablerefrigerantflow.name}, cannot find heat_eir_fplr_high curve, will not be set.") successfully_set_all_properties = false end # Make the HEAT-HCR curve heat_hcr = model_add_curve(airconditioner_variablerefrigerantflow.model, props['heat_hcr']) if heat_hcr airconditioner_variablerefrigerantflow.setHeatingCombinationRatioCorrectionFactorCurve(heat_hcr) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.AirConditionerVariableRefrigerantFlow', "For #{airconditioner_variablerefrigerantflow.name}, cannot find heat_hcr curve, will not be set.") successfully_set_all_properties = false end # Make the HEAT-PLF-FPLR curve heat_plf_fplr = model_add_curve(airconditioner_variablerefrigerantflow.model, props['heat_plf_fplr']) if heat_plf_fplr airconditioner_variablerefrigerantflow.setHeatingPartLoadFractionCorrelationCurve(heat_plf_fplr) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.AirConditionerVariableRefrigerantFlow', "For #{airconditioner_variablerefrigerantflow.name}, cannot find cool_plf_fplr curve, will not be set.") successfully_set_all_properties = false end # Make the HEAT-CAP-FPL curve heat_cap_fpl = model_add_curve(airconditioner_variablerefrigerantflow.model, props['heat_cap_fpl']) if heat_cap_fpl airconditioner_variablerefrigerantflow.setPipingCorrectionFactorforLengthinHeatingModeCurve(heat_cap_fpl) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.AirConditionerVariableRefrigerantFlow', "For #{airconditioner_variablerefrigerantflow.name}, cannot find heat_cap_fpl curve, will not be set.") successfully_set_all_properties = false end end
¶ ↑
Find heating capacity for “AirConditionerVariableRefrigerantFlow” object
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 3069 def airconditioner_variablerefrigerantflow_heating_find_capacity(airconditioner_variablerefrigerantflow) capacity_w = nil if airconditioner_variablerefrigerantflow.ratedTotalHeatingCapacity.is_initialized capacity_w = airconditioner_variablerefrigerantflow.ratedTotalHeatingCapacity.get elsif airconditioner_variablerefrigerantflow.autosizedRatedTotalHeatingCapacity.is_initialized capacity_w = airconditioner_variablerefrigerantflow.autosizedRatedTotalHeatingCapacity.get airconditioner_variablerefrigerantflow.setRatedTotalHeatingCapacity(capacity_w) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.AirConditionerVariableRefrigerantFlow', "For #{airconditioner_variablerefrigerantflow.name} heating capacity is not available.") return 0.0 end return capacity_w end
¶ ↑
Apply efficiencies for ECM ‘hs08_ccashp_vrf’
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 595 def apply_efficiency_ecm_hs08_ccashp_vrf(model, standard, air_sys_eqpt_type: 'ccashp') # Use same performance data as ECM 'hs09_ccashpsys' for air system if air_sys_eqpt_type == 'ccashp' apply_efficiency_ecm_hs09_ccashp_baseboard(model,standard) elsif air_sys_eqpt_type == 'ashp' apply_efficiency_ecm_hs12_ashp_baseboard(model,standard) end # Apply efficiency for VRF units eqpt_name = 'Mitsubishi_Hyper_Heating_VRF_Outdoor_Unit' search_criteria = {} search_criteria['name'] = eqpt_name model.getAirConditionerVariableRefrigerantFlows.sort.each do |vrf_unit| airconditioner_variablerefrigerantflow_cooling_apply_cop(vrf_unit, search_criteria) airconditioner_variablerefrigerantflow_heating_apply_cop(vrf_unit, search_criteria) end # Set fan size of VRF terminal units fan_power_per_flow_rate = 150.0 # based on Mitsubishi data: 100 low and 200 high (W-s/m3) model.getZoneHVACTerminalUnitVariableRefrigerantFlows.each do |iunit| fan = iunit.supplyAirFan.to_FanOnOff.get fan_pr_rise = fan_power_per_flow_rate * (fan.fanEfficiency * fan.motorEfficiency) fan.setPressureRise(fan_pr_rise) end # Set fan size of unit heaters model.getZoneHVACUnitHeaters.each do |iunit| fan = iunit.supplyAirFan.to_FanConstantVolume.get fan_pr_rise = fan_power_per_flow_rate * (fan.fanEfficiency * fan.motorEfficiency) fan.setPressureRise(fan_pr_rise) end end
¶ ↑
Apply effiencies for ECM “hs09_ccashp_baseboard”
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 1302 def apply_efficiency_ecm_hs09_ccashp_baseboard(model,standard) # fraction of electric backup heating coil capacity assigned to dx heating coil fr_backup_coil_cap_as_dx_coil_cap = 0.5 model.getAirLoopHVACs.sort.each do |isys| clg_dx_coil = nil htg_dx_coil = nil backup_coil = nil fans = [] # Find the components on the air loop isys.supplyComponents.sort.each do |icomp| if icomp.to_CoilCoolingDXVariableSpeed.is_initialized clg_dx_coil = icomp.to_CoilCoolingDXVariableSpeed.get elsif icomp.to_CoilHeatingDXVariableSpeed.is_initialized htg_dx_coil = icomp.to_CoilHeatingDXVariableSpeed.get elsif icomp.to_CoilHeatingElectric.is_initialized backup_coil = icomp.to_CoilHeatingElectric.get elsif icomp.to_CoilHeatingGas.is_initialized backup_coil = icomp.to_CoilHeatingGas.get elsif icomp.to_FanConstantVolume.is_initialized fans << icomp.to_FanConstantVolume.get elsif icomp.to_FanVariableVolume.is_initialized fans << icomp.to_FanVariableVolume.get end end if clg_dx_coil && htg_dx_coil && backup_coil clg_dx_coil_init_name = get_hvac_comp_init_name(clg_dx_coil, false) clg_dx_coil.setName(clg_dx_coil_init_name) if clg_dx_coil.autosizedGrossRatedTotalCoolingCapacityAtSelectedNominalSpeedLevel.is_initialized max_pd = 0.0 supply_fan = nil fans.each do |fan| if fan.pressureRise.to_f > max_pd max_pd = fan.pressureRise.to_f supply_fan = fan # assume supply fan has higher pressure drop end end # There is an error in EnergyPlus in the estimated capacity of the coil "CoilCoolingDXVariableSpeed". # Here the capacity reported by OS is adjusted to estimate an appropriate capacity for the cooling coil. # The autosized capacity is corrected for the actual fan flow rate and fan power. if supply_fan.maximumFlowRate.is_initialized fan_max_afr = supply_fan.maximumFlowRate.to_f elsif supply_fan.autosizedMaximumFlowRate.is_initialized fan_max_afr = supply_fan.autosizedMaximumFlowRate.to_f else raise "Fan flow rate is undefined for fan #{supply_fan.name.to_s}" end if clg_dx_coil.ratedAirFlowRateAtSelectedNominalSpeedLevel.is_initialized clg_dx_coil_afr = clg_dx_coil.ratedAirFlowRateAtSelectedNominalSpeedLevel.to_f elsif clg_dx_coil.autosizedRatedAirFlowRateAtSelectedNominalSpeedLevel.is_initialized clg_dx_coil_afr = clg_dx_coil.autosizedRatedAirFlowRateAtSelectedNominalSpeedLevel.to_f else raise "Rated air flow rate at selected nominal speed level is undefined for coil #{clg_dx_coil.name.to_s}" end fan_power = fan_max_afr * max_pd / supply_fan.fanTotalEfficiency.to_f clg_dx_coil_cap = clg_dx_coil.autosizedGrossRatedTotalCoolingCapacityAtSelectedNominalSpeedLevel.to_f * fan_max_afr / clg_dx_coil_afr + fan_power / clg_dx_coil.speeds.last.referenceUnitGrossRatedSensibleHeatRatio.to_f elsif clg_dx_coil.grossRatedTotalCoolingCapacityAtSelectedNominalSpeedLevel.is_initialized clg_dx_coil_cap = clg_dx_coil.grossRatedTotalCoolingCapacityAtSelectedNominalSpeedLevel.to_f else raise "Rated total cooling capacity at selected nominal speed is undefined for coil #{clg_dx_coil.name.to_s}" end htg_dx_coil_init_name = get_hvac_comp_init_name(htg_dx_coil, false) htg_dx_coil.setName(htg_dx_coil_init_name) if backup_coil.nominalCapacity.is_initialized backup_coil_cap = backup_coil.nominalCapacity.to_f elsif backup_coil.autosizedNominalCapacity.is_initialized backup_coil_cap = backup_coil.autosizedNominalCapacity.to_f else raise "Nominal capacity is undefiled for coil #{backup_coil.name.to_s}" end # Set the DX capacities to the maximum of the fraction of the backup coil capacity or the cooling capacity needed dx_cap = fr_backup_coil_cap_as_dx_coil_cap * backup_coil_cap if dx_cap < clg_dx_coil_cap then dx_cap = clg_dx_coil_cap end clg_dx_coil.setGrossRatedTotalCoolingCapacityAtSelectedNominalSpeedLevel(dx_cap) htg_dx_coil.setRatedHeatingCapacityAtSelectedNominalSpeedLevel(dx_cap) # Assign COPs search_criteria = {} search_criteria['name'] = 'Mitsubishi_Hyper_Heating_VRF_Outdoor_Unit RTU' coil_cooling_dx_variable_speed_apply_cop(clg_dx_coil, search_criteria, false) coil_heating_dx_variable_speed_apply_cop(htg_dx_coil, search_criteria, false) end end end
¶ ↑
Apply efficiencies and performance curves for ECM “hs11_ashp_pthp”
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 1466 def apply_efficiency_ecm_hs11_ashp_pthp(model,standard) fr_backup_coil_cap_as_dx_coil_cap = 0.5 # fraction of electric backup heating coil capacity assigned to dx heating coil apply_efficiency_ecm_hs12_ashp_baseboard(model,standard) pthp_eqpt_name = 'HS11_PTHP' model.getAirLoopHVACs.sort.each do |isys| isys.thermalZones.each do |zone| clg_dx_coil = nil htg_dx_coil = nil backup_coil = nil fan = nil zone.equipment.sort.each do |icomp| if icomp.to_ZoneHVACPackagedTerminalHeatPump.is_initialized if icomp.to_ZoneHVACPackagedTerminalHeatPump.get.coolingCoil.to_CoilCoolingDXSingleSpeed.is_initialized clg_dx_coil = icomp.to_ZoneHVACPackagedTerminalHeatPump.get.coolingCoil.to_CoilCoolingDXSingleSpeed.get end if icomp.to_ZoneHVACPackagedTerminalHeatPump.get.heatingCoil.to_CoilHeatingDXSingleSpeed.is_initialized htg_dx_coil = icomp.to_ZoneHVACPackagedTerminalHeatPump.get.heatingCoil.to_CoilHeatingDXSingleSpeed.get end if icomp.to_ZoneHVACPackagedTerminalHeatPump.get.supplementalHeatingCoil.to_CoilHeatingElectric.is_initialized backup_coil = icomp.to_ZoneHVACPackagedTerminalHeatPump.get.supplementalHeatingCoil.to_CoilHeatingElectric.get end if icomp.to_ZoneHVACPackagedTerminalHeatPump.get.supplyAirFan.to_FanOnOff.is_initialized fan = icomp.to_ZoneHVACPackagedTerminalHeatPump.get.supplyAirFan.to_FanOnOff.get end end if clg_dx_coil && htg_dx_coil && backup_coil && fan clg_dx_coil_init_name = get_hvac_comp_init_name(clg_dx_coil, false) clg_dx_coil.setName(clg_dx_coil_init_name) if clg_dx_coil.ratedTotalCoolingCapacity.is_initialized clg_dx_coil_cap = clg_dx_coil.ratedTotalCoolingCapacity.to_f elsif clg_dx_coil.autosizedRatedTotalCoolingCapacity.is_initialized clg_dx_coil_cap = clg_dx_coil.autosizedRatedTotalCoolingCapacity.to_f else raise "The total cooling capacity is undefined for coil #{clg_dx_coil_cap.name.to_s}" end htg_dx_coil_init_name = get_hvac_comp_init_name(htg_dx_coil, true) htg_dx_coil.setName(htg_dx_coil_init_name) if backup_coil.nominalCapacity.is_initialized backup_coil_cap = backup_coil.nominalCapacity.to_f elsif backup_coil.autosizedNominalCapacity.is_initialized backup_coil_cap = backup_coil.autosizedNominalCapacity.to_f else raise "The nominal capacity is undefined for coil #{backup_coil.name.to_s}" end # Set the DX capacities to the maximum of the fraction of the backup coil capacity or the cooling capacity needed dx_cap = fr_backup_coil_cap_as_dx_coil_cap * backup_coil_cap if dx_cap < clg_dx_coil_cap then dx_cap = clg_dx_coil_cap end clg_dx_coil.setRatedTotalCoolingCapacity(dx_cap) htg_dx_coil.setRatedTotalHeatingCapacity(dx_cap) # assign COPs search_criteria = {} search_criteria['name'] = pthp_eqpt_name coil_cooling_dx_single_speed_apply_cop(clg_dx_coil, search_criteria) coil_heating_dx_single_speed_apply_cop(htg_dx_coil, search_criteria) # Set fan power fan_power_per_flow_rate = 150.0 # based on Mitsubishi data: 100 low and 200 high (W-s/m3) fan_pr_rise = fan_power_per_flow_rate * (fan.fanEfficiency * fan.motorEfficiency) fan.setPressureRise(fan_pr_rise) end end end end end
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Apply efficiencies and performance curves for ECM “hs12_ashp_baseboard”
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 1632 def apply_efficiency_ecm_hs12_ashp_baseboard(model,standard) fr_backup_coil_cap_as_dx_coil_cap = 0.5 # fraction of electric backup heating coil capacity assigned to dx heating coil ashp_eqpt_name = 'NECB2015_ASHP' model.getAirLoopHVACs.sort.each do |isys| clg_dx_coil = nil htg_dx_coil = nil backup_coil = nil # Find the coils on the air loop isys.supplyComponents.sort.each do |icomp| if icomp.to_CoilCoolingDXSingleSpeed.is_initialized clg_dx_coil = icomp.to_CoilCoolingDXSingleSpeed.get elsif icomp.to_CoilHeatingDXSingleSpeed.is_initialized htg_dx_coil = icomp.to_CoilHeatingDXSingleSpeed.get elsif icomp.to_CoilHeatingElectric.is_initialized backup_coil = icomp.to_CoilHeatingElectric.get elsif icomp.to_CoilHeatingGas.is_initialized backup_coil = icomp.to_CoilHeatingGas.get end end if clg_dx_coil && htg_dx_coil && backup_coil # update names of dx coils clg_dx_coil_init_name = get_hvac_comp_init_name(clg_dx_coil, false) clg_dx_coil.setName(clg_dx_coil_init_name) if clg_dx_coil.ratedTotalCoolingCapacity.is_initialized clg_dx_coil_cap = clg_dx_coil.ratedTotalCoolingCapacity.to_f elsif clg_dx_coil.autosizedRatedTotalCoolingCapacity.is_initialized clg_dx_coil_cap = clg_dx_coil.autosizedRatedTotalCoolingCapacity.to_f else raise "Rated total cooling capacity is undefined for coil #{clg_dx_coil.name.to_s}" end htg_dx_coil_init_name = get_hvac_comp_init_name(htg_dx_coil, true) htg_dx_coil.setName(htg_dx_coil_init_name) if backup_coil.nominalCapacity.is_initialized backup_coil_cap = backup_coil.nominalCapacity.to_f elsif backup_coil.autosizedNominalCapacity.is_initialized backup_coil_cap = backup_coil.autosizedNominalCapacity.to_f else raise "Nominal capacity is undefined for coil #{backup_coil.name.to_s}" end # set the DX capacities to the maximum of the fraction of the backup coil capacity or the cooling capacity needed dx_cap = fr_backup_coil_cap_as_dx_coil_cap * backup_coil_cap if dx_cap < clg_dx_coil_cap then dx_cap = clg_dx_coil_cap end clg_dx_coil.setRatedTotalCoolingCapacity(dx_cap) htg_dx_coil.setRatedTotalHeatingCapacity(dx_cap) # assign COPs search_criteria = {} search_criteria['name'] = ashp_eqpt_name coil_cooling_dx_single_speed_apply_cop(clg_dx_coil, search_criteria) coil_heating_dx_single_speed_apply_cop(htg_dx_coil, search_criteria) end end end
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Apply efficiencies and performance curves for ECM “hs12_ashp_vrf”
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 1706 def apply_efficiency_ecm_hs13_ashp_vrf(model,standard) # call method for ECM hs08 with ASHP in air system apply_efficiency_ecm_hs08_ccashp_vrf(model, standard, air_sys_eqpt_type: 'ashp') end
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Appy efficiencies for ECM "hs14_cgshp_fancoils"
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 1856 def apply_efficiency_ecm_hs14_cgshp_fancoils(model,standard) heatpump_siz_f = 0.4 # sizing factor for water-source heat pump (heating mode) chiller_siz_f = 0.4 # sizing factor for water-cooled chiller # get water-source heat pump and boiler hw_loops = model.getPlantLoops.select {|loop| loop.sizingPlant.loopType.to_s.downcase == 'heating'} hw_heatpump_loop = nil hw_heatpump = nil hw_boiler = nil hw_loops.each do |hw_loop| hw_heatpumps = hw_loop.supplyComponents.select {|comp| comp.to_HeatPumpWaterToWaterEquationFitHeating.is_initialized} if !hw_heatpumps.empty? hw_heatpump_loop = hw_loop hw_heatpump = hw_heatpumps[0].to_HeatPumpWaterToWaterEquationFitHeating.get end hw_boilers = hw_loop.supplyComponents.select {|comp| comp.to_BoilerHotWater.is_initialized} hw_boiler = hw_boilers[0].to_BoilerHotWater.get if !hw_boilers.empty? break if !hw_heatpump_loop.nil? && !hw_heatpump.nil? && !hw_boiler.nil? end raise("apply_efficiency_ecm_hs14_cgshp_fancoils: no water-source heat pump found in heating loop #{hw_loops.name.to_s}") if hw_heatpump.nil? cw_loop = model.getPlantLoops.select {|loop| loop.sizingPlant.loopType.to_s.downcase == 'condenser'}[0] # condenser flow rate is set based on heating loop flow rate and cooling loop flow rate (adjusted for sizing factors) cw_loop_max_flow = 0.0 if hw_heatpump_loop.maximumLoopFlowRate.is_initialized cw_loop_max_flow += heatpump_siz_f*hw_heatpump_loop.maximumLoopFlowRate.to_f elsif hw_heatpump_loop.autosizedMaximumLoopFlowRate.is_initialized cw_loop_max_flow += heatpump_siz_f*hw_heatpump_loop.autosizedMaximumLoopFlowRate.to_f else raise("apply_efficiency_ecm_hs14_cgshp_fancoils: heating loop #{hw_heatpump_loop.name.to_s} flow rate is not defined") end chw_loop = model.getPlantLoops.select {|loop| loop.sizingPlant.loopType.to_s.downcase == 'cooling'}[0] if chw_loop.maximumLoopFlowRate.is_initialized cw_loop_max_flow += chiller_siz_f*chw_loop.maximumLoopFlowRate.to_f elsif chw_loop.autosizedMaximumLoopFlowRate.is_initialized cw_loop_max_flow += chiller_siz_f*chw_loop.autosizedMaximumLoopFlowRate.to_f else raise("apply_efficiency_ecm_hs14_cgshp_fancoils: cooling loop #{chw_loop.name.to_s} is not defined") end cw_loop.setMaximumLoopFlowRate(cw_loop_max_flow) cw_loop_pump = cw_loop.supplyComponents.select {|comp| comp.to_PumpVariableSpeed.is_initialized}[0].to_PumpVariableSpeed.get cw_loop_pump.setRatedFlowRate(cw_loop_max_flow) # set heating capacity of water-source heat pump and boiler if hw_heatpump.autosizedRatedHeatingCapacity.is_initialized cap = hw_heatpump.autosizedRatedHeatingCapacity.to_f elsif hw_heatpump.ratedHeatingCapacity.is_initialized cap = hw_heatpump.ratedHeatingCapacity.to_f elsif hw_heatpump.autosizedRatedHeatingCapacity.is_initialized cap = hw_heatpump.autosizedRatedHeatingCapacity.to_f else raise("apply_efficiency_ecm_hs14_cgshp_fancoils: capacity of water-source heat pump #{hw_heatpump.name.to_s} is not defined") end hw_heatpump.setRatedHeatingCapacity(heatpump_siz_f*cap) hw_boiler.setNominalCapacity((1.0-heatpump_siz_f)*cap) # set cooling capacity of chillers chillers = chw_loop.supplyComponents.select {|comp| comp.to_ChillerElectricEIR.is_initialized} chiller_water_cooled = nil chiller_air_cooled = nil chillers.each do |comp| chlr = comp.to_ChillerElectricEIR.get chiller_water_cooled = chlr if chlr.name.to_s.include? 'ChillerWaterCooled' chiller_air_cooled = chlr if chlr.name.to_s.include? 'ChillerAirCooled' break if !chiller_water_cooled.nil? && !chiller_air_cooled.nil? end raise("apply_efficiency_ecm_hs14_cgshp_fancoils: no water-cooled chiller found in cooling loop #{chw_loop.name.to_s}") if chiller_water_cooled.nil? raise("apply_efficiency_ecm_hs14_cgshp_fancoils: no air-cooled chiller found in cooling loop #{chw_loop.name.to_s}") if chiller_air_cooled.nil? if chiller_water_cooled.autosizedReferenceCapacity.is_initialized cap = chiller_water_cooled.autosizedReferenceCapacity.to_f elsif chiller_water_cooled.referenceCapacity.is_initialized cap = chiller_water_cooled.referenceCapacity.to_f elsif chiller_water_cooled.autosizedReferenceCapacity.is_initialized cap = chiller_water_cooled.autosizedReferenceCapacity.to_f else raise("apply_efficiency_ecm_hs14_cgshp_fancoils: cooling capacity of chiller #{chiller_water_cooled.name.to_s} is not defined") end chiller_water_cooled.setReferenceCapacity(chiller_siz_f*cap) chiller_air_cooled.setReferenceCapacity((1.0-chiller_siz_f)*cap) # call standard efficiency method again for water-cooled chiller new_chlr_name = chiller_water_cooled.name.to_s.chomp!(chiller_water_cooled.name.to_s.split.last).strip new_chlr_name = new_chlr_name.chomp!(new_chlr_name.split.last).strip new_chlr_name = new_chlr_name.chomp!(new_chlr_name.split.last).strip chiller_water_cooled.setName(new_chlr_name) standard.chiller_electric_eir_apply_efficiency_and_curves(chiller_water_cooled,nil) # set curves and cop of air-cooled chiller chlr_cap_w = (1.0-chiller_siz_f)*cap chlr_cap_ton = OpenStudio.convert(chlr_cap_w, 'W', 'ton').get search_criteria = {} search_criteria['cooling_type'] = 'AirCooled' chlr_props = model_find_object(standards_data['tables']['chiller_types_ecm']['table'], search_criteria, chlr_cap_ton) chiller_air_cooled.setName("ChillerAirCooled #{chlr_props['compressor_type']}") search_criteria = {} search_criteria['name'] = 'NECB2020_AirCooledChiller' search_criteria['compressor_type'] = chlr_props['compressor_type'] chiller_electric_eir_apply_curves_and_cop(chiller_air_cooled, search_criteria) end
This method will set the properties of the ERV. Must be run after the standard efficiency is complete as this will overwrite those values. See data/erv.json to view/add different erv packages available.
# File lib/openstudio-standards/standards/necb/ECMS/erv.rb, line 4 def apply_erv_ecm_efficiency(model:, erv_package: nil) # If erv is nil.. do nothing. return if erv_package.nil? || erv_package == 'none' || erv_package == 'NECB_Default' erv_info = @standards_data['tables']['erv']['table'].detect { |item| item['erv_name'] == erv_package } # Check if we were able to get data. if erv_info.nil? # Get name of ERVs in erv.json. valid = @standards_data['tables']['erv']['table'].map { |x| x['erv_name'] } # tell user. raise("ERV package name #{erv_package} does not exist. must be #{valid} /n Stopping.") end # add ervs if required model.getAirLoopHVACs.sort.each do |air_loop| if air_loop.airLoopHVACOutdoorAirSystem.is_initialized erv = air_loop.airLoopHVACOutdoorAirSystem.get.components.select{|comp| comp.to_HeatExchangerAirToAirSensibleAndLatent.is_initialized} if (erv.empty? && (erv_info['application'] == 'Add_ERVs_To_All_Airloops')) air_loop_hvac_apply_energy_recovery_ventilator(air_loop, nil) end end end # Apply ecm effectiveness values model.getHeatExchangerAirToAirSensibleAndLatents.each { |erv| heat_exchanger_air_to_air_sensible_and_latent_apply_effectiveness(erv, erv_package) } end
# File lib/openstudio-standards/standards/necb/ECMS/nv.rb, line 2 def apply_nv(model:, nv_type:, nv_opening_fraction:, nv_temp_out_min:, nv_delta_temp_in_out:) ##### If any of users' inputs are nil/false/none, do nothing. ##### If users' input for 'nv_type' is 'NECB_Default', do nothing. ##### If any of users' inputs for nv_opening_fraction/nv_temp_out_min/nv_delta_temp_in_out is 'NECB_Default', use default values as defined here. return if nv_type.nil? || nv_type == false || nv_type == 'none' || nv_type == 'NECB_Default' return if nv_opening_fraction.nil? || nv_opening_fraction == false || nv_opening_fraction == 'none' return if nv_temp_out_min.nil? || nv_temp_out_min == false || nv_temp_out_min == 'none' return if nv_delta_temp_in_out.nil? || nv_delta_temp_in_out == false || nv_delta_temp_in_out == 'none' ##### Convert a string to a float (except for nv_type) if nv_opening_fraction.instance_of?(String) && nv_opening_fraction != 'NECB_Default' nv_opening_fraction = nv_opening_fraction.to_f end if nv_temp_out_min.instance_of?(String) && nv_temp_out_min != 'NECB_Default' nv_temp_out_min = nv_temp_out_min.to_f end if nv_delta_temp_in_out.instance_of?(String) && nv_delta_temp_in_out != 'NECB_Default' nv_delta_temp_in_out = nv_delta_temp_in_out.to_f end ##### Set default nv_opening_fraction as 0.1 if nv_opening_fraction == 'NECB_Default' nv_opening_fraction = 0.1 end ##### Set default nv_temp_out_min as 13.0 if nv_temp_out_min == 'NECB_Default' nv_temp_out_min = 13.0 # Note: 13.0 is based on inputs from Michel Tardif re a real school in QC end ##### Set default nv_delta_temp_in_out as 1.0 if nv_delta_temp_in_out == 'NECB_Default' nv_delta_temp_in_out = 1.0 # Note: 1.0 is based on inputs from Michel Tardif re a real school in QC end setpoint_adjustment_for_nv = 2.0 # This is to adjust heating and cooling setpoint temperature as min and max indoor temperature to have NV model.getZoneHVACEquipmentLists.sort.each do |zone_hvac_equipment_list| thermal_zone = zone_hvac_equipment_list.thermalZone thermal_zone.spaces.sort.each do |space| number_of_windows = 0.0 ##### Gather OA per person and floor area of the space from the osm file outdoor_air = space.designSpecificationOutdoorAir.get outdoor_air_flow_per_person = outdoor_air.outdoorAirFlowperPerson outdoor_air_flow_per_floor_area = outdoor_air.outdoorAirFlowperFloorArea ##### Get heating/cooling setpoint temperature schedules from the osm file # These schedules are used for min/max Tin schedules under the objects of "ZoneVentilation:DesignFlowRate" and "ZoneVentilation:WindandStackOpenArea". # Note: as per E+ I/O Ref.: "If the user enters a valid schedule name, the minimum/maximum temperature values specified in this schedule will override the constant value specified in the Minimum/Maximum Indoor Temperature field." under the objects of "ZoneVentilation:DesignFlowRate" and "ZoneVentilation:WindandStackOpenArea". if thermal_zone.thermostat.is_initialized if thermal_zone.thermostat.get.to_ThermostatSetpointDualSetpoint.is_initialized if thermal_zone.thermostat.get.to_ThermostatSetpointDualSetpoint.get.heatingSetpointTemperatureSchedule.is_initialized || thermal_zone.thermostat.get.to_ThermostatSetpointDualSetpoint.get.coolingSetpointTemperatureSchedule.is_initialized zone_thermostat = thermal_zone.thermostatSetpointDualSetpoint.get zone_clg_thermostat_sch = zone_thermostat.coolingSetpointTemperatureSchedule.get zone_htg_thermostat_sch = zone_thermostat.heatingSetpointTemperatureSchedule.get ##### Create schedule for max Tin to have NV on the basis of cooling setpoint temperature for default day zone_clg_thermostat_sch_name = zone_clg_thermostat_sch.name zone_clg_sp_schedule = zone_clg_thermostat_sch.to_ScheduleRuleset.get max_Tin_schedule = zone_clg_sp_schedule.clone(model).to_ScheduleRuleset.get max_Tin_schedule.setName('natural_ventilation_max_Tin_schedule') ## default days/weekdays max_Tin_schedule_defaultDay = max_Tin_schedule.defaultDaySchedule max_Tin_schedule_defaultDay.setName('natural_ventilation_max_Tin_schedule_defaultDay') max_Tin_schedule_defaultDay_times = max_Tin_schedule_defaultDay.times max_Tin_schedule_defaultDay_values = max_Tin_schedule_defaultDay.values max_Tin_schedule_defaultDay_values_adjusted = max_Tin_schedule_defaultDay_values.map { |i| i + setpoint_adjustment_for_nv } i = 0.0 max_Tin_schedule_defaultDay_times.each do |time| max_Tin_schedule_defaultDay.addValue(time, max_Tin_schedule_defaultDay_values_adjusted[i]) i += 1.0 end ##### Create schedule for min Tin to have NV on the basis of cooling setpoint temperature for default day zone_htg_thermostat_sch_name = zone_htg_thermostat_sch.name zone_htg_sp_schedule = zone_htg_thermostat_sch.to_ScheduleRuleset.get min_Tin_schedule = zone_htg_sp_schedule.clone(model).to_ScheduleRuleset.get min_Tin_schedule.setName('natural_ventilation_min_Tin_schedule') ## default days/weekdays min_Tin_schedule_defaultDay = min_Tin_schedule.defaultDaySchedule min_Tin_schedule_defaultDay.setName('natural_ventilation_min_Tin_schedule_defaultDay') min_Tin_schedule_defaultDay_times = min_Tin_schedule_defaultDay.times min_Tin_schedule_defaultDay_values = min_Tin_schedule_defaultDay.values min_Tin_schedule_defaultDay_values_adjusted = min_Tin_schedule_defaultDay_values.map { |index| index - setpoint_adjustment_for_nv } i = 0.0 min_Tin_schedule_defaultDay_times.each do |time| min_Tin_schedule_defaultDay.addValue(time, min_Tin_schedule_defaultDay_values_adjusted[i]) i += 1.0 end ##### Calculate how many windows a space has. # The total number of windows is used to divide OA/person and OA/FloorArea of the space by it (i.e. number of windows). # In this way, NV-driven OA in each space would be avoided to be more than required. space.surfaces.sort.each do |surface| surface.subSurfaces.sort.each do |subsurface| if (subsurface.subSurfaceType == 'OperableWindow' || subsurface.subSurfaceType == 'FixedWindow') && subsurface.outsideBoundaryCondition == 'Outdoors' number_of_windows += 1.0 end end end oa_per_person_normalized_by_number_of_windows = outdoor_air_flow_per_person / number_of_windows oa_per_floor_area_normalized_by_number_of_windows = outdoor_air_flow_per_floor_area / number_of_windows ##### Add NV in each space that has window(s) using two objects: "ZoneVentilation:DesignFlowRate" and "ZoneVentilation:WindandStackOpenArea" space.surfaces.sort.each do |surface| surface.subSurfaces.sort.each do |subsurface| if (subsurface.subSurfaceType == 'OperableWindow' || subsurface.subSurfaceType == 'FixedWindow') && subsurface.outsideBoundaryCondition == 'Outdoors' window_azimuth_deg = OpenStudio.convert(subsurface.azimuth, 'rad', 'deg').get window_area = subsurface.netArea ##### Define a constant schedule for operable windows operable_window_schedule = OpenStudio::Model::ScheduleConstant.new(model) operable_window_schedule.setName('operable_window_schedule_constant') operable_window_schedule.setScheduleTypeLimits(BTAP::Resources::Schedules::StandardScheduleTypeLimits.get_on_off(model)) ##### Add a "ZoneVentilation:DesignFlowRate" object for NV to set OA per person. zn_vent_design_flow_rate_1 = OpenStudio::Model::ZoneVentilationDesignFlowRate.new(model) zn_vent_design_flow_rate_1.setFlowRateperPerson(oa_per_person_normalized_by_number_of_windows) if model.version < OpenStudio::VersionString.new('3.5.0') # Design Flow Rate Calculation Method is automatically set in 3.5.0+ zn_vent_design_flow_rate_1.setDesignFlowRateCalculationMethod('Flow/Person') end zn_vent_design_flow_rate_1.setVentilationType('Natural') zn_vent_design_flow_rate_1.setMinimumIndoorTemperatureSchedule(min_Tin_schedule) zn_vent_design_flow_rate_1.setMaximumIndoorTemperatureSchedule(max_Tin_schedule) zn_vent_design_flow_rate_1.setMinimumOutdoorTemperature(nv_temp_out_min) zn_vent_design_flow_rate_1.setMaximumOutdoorTemperatureSchedule(max_Tin_schedule) zn_vent_design_flow_rate_1.setDeltaTemperature(nv_delta_temp_in_out) # E+ I/O Ref.: "This is the temperature difference between the indoor and outdoor air dry-bulb temperatures below which ventilation is shutoff." zone_hvac_equipment_list.addEquipment(zn_vent_design_flow_rate_1) ##### Add another "ZoneVentilation:DesignFlowRate" object for NV to set OA per floor area. zn_vent_design_flow_rate_2 = OpenStudio::Model::ZoneVentilationDesignFlowRate.new(model) zn_vent_design_flow_rate_2.setFlowRateperZoneFloorArea(oa_per_floor_area_normalized_by_number_of_windows) if model.version < OpenStudio::VersionString.new('3.5.0') # Design Flow Rate Calculation Method is automatically set in 3.5.0+ zn_vent_design_flow_rate_2.setDesignFlowRateCalculationMethod('Flow/Area') end zn_vent_design_flow_rate_2.setVentilationType('Natural') zn_vent_design_flow_rate_2.setMinimumIndoorTemperatureSchedule(min_Tin_schedule) zn_vent_design_flow_rate_2.setMaximumIndoorTemperatureSchedule(max_Tin_schedule) zn_vent_design_flow_rate_2.setMinimumOutdoorTemperature(nv_temp_out_min) zn_vent_design_flow_rate_2.setMaximumOutdoorTemperatureSchedule(max_Tin_schedule) zn_vent_design_flow_rate_2.setDeltaTemperature(nv_delta_temp_in_out) zone_hvac_equipment_list.addEquipment(zn_vent_design_flow_rate_2) ##### Add the "ZoneVentilation:WindandStackOpenArea" for NV. # Note: it has been assumed that 'Opening Effectiveness' and 'Discharge Coefficient for Opening' are autocalculated (which are the default assumptions). zn_vent_wind_and_stack = OpenStudio::Model::ZoneVentilationWindandStackOpenArea.new(model) zn_vent_wind_and_stack.setOpeningArea(window_area * nv_opening_fraction) zn_vent_wind_and_stack.setOpeningAreaFractionSchedule(operable_window_schedule) # (Ref: E+ I/O) The Effective Angle value "is used to calculate the angle between the wind direction and the opening outward normal to determine the opening effectiveness values when the input field Opening Effectiveness = Autocalculate." # (Ref: E+ I/O) "Effective Angle is the angle in degrees counting from the North clockwise to the opening outward normal." zn_vent_wind_and_stack.setEffectiveAngle(window_azimuth_deg) zn_vent_wind_and_stack.setMinimumIndoorTemperatureSchedule(min_Tin_schedule) zn_vent_wind_and_stack.setMaximumIndoorTemperatureSchedule(max_Tin_schedule) zn_vent_wind_and_stack.setMinimumOutdoorTemperature(nv_temp_out_min) zn_vent_wind_and_stack.setMaximumOutdoorTemperatureSchedule(max_Tin_schedule) zn_vent_wind_and_stack.setDeltaTemperature(nv_delta_temp_in_out) zone_hvac_equipment_list.addEquipment(zn_vent_wind_and_stack) # if (subsurface.subSurfaceType == 'OperableWindow' || subsurface.subSurfaceType == 'FixedWindow') && subsurface.outsideBoundaryCondition == 'Outdoors' end # surface.subSurfaces.sort.each do |subsurface| end # space.surfaces.sort.each do |surface| end end end end # thermal_zone.spaces.sort.each do |space| end # model.getZoneHVACEquipmentLists.sort.each do |zone_hvac_equipment_list| end ##### Add AvailabilityManagerHybridVentilation to "prevents simultaneous natural ventilation and HVAC system operation" (Ref: E+ I/O) model.getAirLoopHVACs.sort.each do |air_loop| air_loop.availabilityManagers.sort.each do |avail_mgr| if avail_mgr.to_AvailabilityManagerHybridVentilation.empty? avail_mgr_hybr_vent = OpenStudio::Model::AvailabilityManagerHybridVentilation.new(model) avail_mgr_hybr_vent.setMinimumOutdoorTemperature(nv_temp_out_min) # Note: since "Ventilation Control Mode" is by default set to "Temperature (i.e. 1)", only min and max Tout are needed. (see E+ I/O Ref.) #Note: Tout_min is to avoid overcooling (see E+ I/O Ref). avail_mgr_hybr_vent.setMaximumOutdoorTemperature(30.0) # Note: the AvailabilityManagerHybridVentilation obj does not have a schedule field for Tout, so it has been set to a fixed value of 30C. air_loop.addAvailabilityManager(avail_mgr_hybr_vent) end end end end
# File lib/openstudio-standards/standards/necb/ECMS/pv_ground.rb, line 2 def apply_pv_ground(model:, pv_ground_type:, pv_ground_total_area_pv_panels_m2:, pv_ground_tilt_angle:, pv_ground_azimuth_angle:, pv_ground_module_description:) ##### Remove leading or trailing whitespace in case users add them in inputs if pv_ground_total_area_pv_panels_m2.instance_of?(String) pv_ground_total_area_pv_panels_m2 = pv_ground_total_area_pv_panels_m2.strip end if pv_ground_tilt_angle.instance_of?(String) pv_ground_tilt_angle = pv_ground_tilt_angle.strip end if pv_ground_azimuth_angle.instance_of?(String) pv_ground_azimuth_angle = pv_ground_azimuth_angle.strip end ##### If any of users' inputs are nil/false do nothing. return if pv_ground_type.nil? || pv_ground_type == false || pv_ground_type == 'none' || pv_ground_type == 'NECB_Default' return if pv_ground_total_area_pv_panels_m2 == nil? || pv_ground_total_area_pv_panels_m2 == false || pv_ground_total_area_pv_panels_m2 == 'none' return if pv_ground_tilt_angle == nil? || pv_ground_tilt_angle == false || pv_ground_tilt_angle == 'none' return if pv_ground_azimuth_angle == nil? || pv_ground_azimuth_angle == false || pv_ground_azimuth_angle == 'none' return if pv_ground_module_description == nil? || pv_ground_module_description == false || pv_ground_module_description == 'none' ##### Convert a string to a float (except for pv_ground_type and pv_ground_module_description) if pv_ground_total_area_pv_panels_m2.instance_of?(String) && pv_ground_total_area_pv_panels_m2 != 'NECB_Default' pv_ground_total_area_pv_panels_m2 = pv_ground_total_area_pv_panels_m2.to_f end if pv_ground_tilt_angle.instance_of?(String) && pv_ground_tilt_angle != 'NECB_Default' pv_ground_tilt_angle = pv_ground_tilt_angle.to_f end if pv_ground_azimuth_angle.instance_of?(String) && pv_ground_azimuth_angle != 'NECB_Default' pv_ground_azimuth_angle = pv_ground_azimuth_angle.to_f end ##### Calculate footprint of the building model (this is used as default value for pv_ground_total_area_pv_panels_m2) building_footprint_m2 = calculate_building_footprint(model: model) # puts "building_footprint_m2 is #{building_footprint_m2}" ##### Set default PV panels' total area as the building footprint if pv_ground_total_area_pv_panels_m2 == 'NECB_Default' pv_ground_total_area_pv_panels_m2 = building_footprint_m2 end ##### Set default PV panels' tilt angle as the latitude if pv_ground_tilt_angle == 'NECB_Default' epw = OpenStudio::EpwFile.new(model.weatherFile.get.path.get) pv_ground_tilt_angle = epw.latitude end ##### Set default PV panels' azimuth angle as south-facing arrays if pv_ground_azimuth_angle == 'NECB_Default' pv_ground_azimuth_angle = 180 # EnergyPlus I/O Reference: "An azimuth angle of 180deg is for a south-facing array, and an azimuth angle of 0deg is for a north-facing array." end ##### Set default PV module type as the the below one if pv_ground_module_description == 'NECB_Default' pv_ground_module_description = 'HES-160-36PV 26.6 x 58.3 x 1.38' # Note: As per Mike Lubun's comment, assuming a typical panel is 5 ft x 2 ft, the closest standard type PV panel in the spreadsheet would be the 160W HES. end ##### Calculate number of PV panels # Note: assuming 5 ft x 2 ft as PV panel's size since it seems to fit the racking system used for ground mounts as per Mike Lubun's comment. pv_area_each_ft2 = 5.0 * 2.0 pv_area_each_m2 = OpenStudio.convert(pv_area_each_ft2, 'ft^2', 'm^2').get # convert pv_area_each_ft2 to m2 pv_number_panels = pv_ground_total_area_pv_panels_m2 / pv_area_each_m2 ##### Get data of the PV panel from the json file pv_info = @standards_data['tables']['pv']['table'].detect { |item| item['pv_module_description'] == pv_ground_module_description } pv_ground_module_type = pv_info['pv_module_type'] pv_watt = pv_info['pv_module_wattage'] ##### Create the generator # Assuming one PVWatts generator in E+ as per Mike Lubun's comment for simplification, however exact number of PVWatts generators (and inverters) are calculated for costing. dc_system_capacity = pv_number_panels * pv_watt generator = OpenStudio::Model::GeneratorPVWatts.new(model, dc_system_capacity) generator.setModuleType(pv_ground_module_type) # generator.setArrayType('OneAxis') # Note: "tilt and azimuth are fixed" for this array type (see E+ I/O Reference). This array type has been chosen as per Mike Lubun's costing spec. generator.setArrayType('FixedOpenRack') # Note: The 'FixedOpenRack' array type has been used instead of 'OneAxis' since the 'OneAxis' array type did not allow to have a non-zero tilt angle in OpenStudio 3.2.1. # (As per E+ I/O Reference: 'FixedOpenRack' is used for ground mounted arrays, assumes air flows freely around the array.) generator.setTiltAngle(pv_ground_tilt_angle) generator.setAzimuthAngle(pv_ground_azimuth_angle) ##### Create the inverter inverter = OpenStudio::Model::ElectricLoadCenterInverterPVWatts.new(model) inverter.setDCToACSizeRatio(1.1) # Note: This is EnergyPlus' default value; This default value has been chosen for ground-mounted PV, assuming no storage as per Mike Lubun's costing spec. inverter.setInverterEfficiency(0.96) # Note: This is EnergyPlus' default value; This default value has been chosen as per Mike Lubun's costing spec. ##### Add distribution systems, set relevant parameters, and add created generator to it elc_distribution = OpenStudio::Model::ElectricLoadCenterDistribution.new(model) elc_distribution.setInverter(inverter) elc_distribution.setGeneratorOperationSchemeType('Baseload') # E+ I/O Reference: "The Baseload scheme requests all generators scheduled ON (available) to operate, even if the amount of electric power generated exceeds the total facility electric power demand." This scheme type has been chosen as per Mike Lubun's costing spec. elc_distribution.addGenerator(generator) end
# File lib/openstudio-standards/standards/necb/ECMS/ecms.rb, line 42 def apply_system_ecm(model:, ecm_system_name: nil, template_standard:, runner: nil, ecm_system_zones_map_option: 'NECB_Default') # Do nothing if nil or other usual suspects.. covering all bases for now. return if ecm_system_name.nil? || ecm_system_name == 'none' || ecm_system_name == 'NECB_Default' # Verify the heating fuel primary_heating_fuel = template_standard.fuel_type_set.ecm_fueltype raise("Heating fuel for ECM #{ecm_system_name} is neither Electricity nor NaturalGas") if ((primary_heating_fuel != 'Electricity') && (primary_heating_fuel != 'NaturalGas')) ecm_system_zones_map_option = 'NECB_Default' if ecm_system_zones_map_option.nil? || ecm_system_zones_map_option == 'none' ecm_std = Standard.build('ECMS') systems = model.getAirLoopHVACs map_system_to_zones, system_doas_flags = ecm_std.get_map_systems_to_zones(systems) ecm_add_method_name = "add_ecm_#{ecm_system_name.downcase}" raise("the method #{ecm_add_method_name} does not exist in the ECM class. Please verify that this should be called.") unless ecm_std.respond_to? ecm_add_method_name # when the ecm is associated with adding a new HVAC system, then remove existing system components and loops ecm_std.remove_all_zone_eqpt(systems) ecm_std.remove_air_loops(model) ecm_std.remove_hw_loops(model) ecm_std.remove_chw_loops(model) ecm_std.remove_cw_loops(model) ecm_std.send(ecm_add_method_name, model: model, system_zones_map: map_system_to_zones, system_doas_flags: system_doas_flags, ecm_system_zones_map_option: ecm_system_zones_map_option, standard: template_standard) end
# File lib/openstudio-standards/standards/necb/ECMS/ecms.rb, line 76 def apply_system_efficiencies_ecm(model:, ecm_system_name: nil, template_standard:) # Do nothing if nil. return if ecm_system_name.nil? || ecm_system_name == 'none' || ecm_system_name == 'NECB_Default' || ecm_system_name.to_s.downcase == 'remove_airloops_add_zone_baseboards' ecm_std = Standard.build('ECMS') # Get method name that should be present in the ECM class. ecm_apply_eff_method_name = "apply_efficiency_ecm_#{ecm_system_name.downcase}" # Raise exception if method does not exists. raise("the method #{ecm_apply_eff_method_name} does not exist in the ECM class. Please verify that this should be called.") unless ecm_std.respond_to?(ecm_apply_eff_method_name) # apply system eff method. ecm_std.send(ecm_apply_eff_method_name, model, template_standard) end
Method for calculating footprint of the building model
# File lib/openstudio-standards/standards/necb/ECMS/pv_ground.rb, line 91 def calculate_building_footprint(model:) building_footprint_m2_array = [] lowest_floor = 10000000000.0 # dummy number as initialization to find the lowest floor among spaces # @todo Question:it it fine that it has been assumed that the floor of all lowest spaces are at the same level? model.getSpaces.sort.each do |space| space.surfaces.sort.select { |surface| (surface.surfaceType == 'Floor') && (surface.outsideBoundaryCondition != 'Surface') && (surface.outsideBoundaryCondition != 'Adiabatic') }.each do |surface| floor_vertices = surface.vertices floor_z = floor_vertices[0].z.round(1) if floor_z <= lowest_floor lowest_floor = floor_z building_footprint_m2_array << surface.netArea end end end building_footprint_m2 = building_footprint_m2_array.sum return building_footprint_m2 end
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Applies the performance curves “ChillerElectricEIR” object.
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 2161 def chiller_electric_eir_apply_curves_and_cop(chiller_electric_eir, search_criteria) successfully_set_all_properties = true # Get the capacity capacity_w = chiller_electric_eir_find_capacity(chiller_electric_eir) capacity_tons = OpenStudio.convert(capacity_w, 'W', 'ton').get # Lookup performance curves chlr_props = model_find_object(standards_data['tables']['chillers_ecm']['table'], search_criteria, capacity_tons) # Check to make sure properties were found if chlr_props.nil? OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standard.ChillerElectricEIR', "For #{chiller_electric_eir.name}, cannot find efficiency info using #{search_criteria}") successfully_set_all_properties = false end # CAP-FT curve capft = model_add_curve(chiller_electric_eir.model, chlr_props['capft']) if capft chiller_electric_eir.setCoolingCapacityFunctionOfTemperature(capft) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standard.ChillerElectricEIR', "For #{chiller_electric_eir.name}, cannot find cap_ft curve, will not be set.") successfully_set_all_properties = false end # EIR-FT curve eirft = model_add_curve(chiller_electric_eir.model, chlr_props['eirft']) if eirft chiller_electric_eir.setElectricInputToCoolingOutputRatioFunctionOfTemperature(eirft) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standard.ChillerElectricEIR', "For #{chiller_electric_eir.name}, cannot find eir_ft curve, will not be set.") successfully_set_all_properties = false end # EIR-FPLR curve eirfplr = model_add_curve(chiller_electric_eir.model, chlr_props['eirfplr']) if eirfplr chiller_electric_eir.setElectricInputToCoolingOutputRatioFunctionOfPLR(eirfplr) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standard.ChillerElectricEIR', "For #{chiller_electric_eir.name}, cannot find eir_fplr curve, will not be set.") successfully_set_all_properties = false end # set COP cop = chlr_props['minimum_coefficient_of_performance_cooling'].to_f if cop chiller_electric_eir.setReferenceCOP(cop) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standard.ChillerElectricEIR', "For #{chiller_electric_eir.name}, cannot find cop, will not be set.") successfully_set_all_properties = false end end
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Find cooling capacity for “ChillerElectricEIR” object
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 3086 def chiller_electric_eir_find_capacity(chiller_electric_eir) capacity_w = nil if chiller_electric_eir.referenceCapacity.is_initialized capacity_w = chiller_electric_eir.referenceCapacity.get elsif chiller_electric_eir.autosizedRererenceCapacity.is_initialized capacity_w = chiller_electric_eir.autosizedRerenceCapacity.get chiller_electric_eir.setReferenceCapacity(capacity_w) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.ChillerElectricEIR', "For #{chiller_electric_eir.name} capacity not available") return 0.0 end return capacity_w end
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Find efficiency for “CoilCoolingDXSingleSpeed” object
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 2617 def coil_cooling_dx_single_speed_apply_cop(coil_cooling_dx_single_speed, search_criteria, rename = false) capacity_w = coil_cooling_dx_single_speed_find_capacity(coil_cooling_dx_single_speed) capacity_btu_per_hr = OpenStudio.convert(capacity_w, 'W', 'Btu/hr').get capacity_kbtu_per_hr = OpenStudio.convert(capacity_w, 'W', 'kBtu/hr').get # Look up the efficiency characteristics ac_props = model_find_object(standards_data['tables']['heat_pump_cooling_ecm']['table'], search_criteria, capacity_btu_per_hr) # Check to make sure properties were found if ac_props.nil? OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilCoolingDXSingleSpeed', "For #{coil_cooling_dx_single_speed.name}, cannot find efficiency info using #{search_criteria}.") successfully_set_all_properties = false return successfully_set_all_properties end # Get the minimum efficiency cop = nil # If specified as SEER unless ac_props['minimum_seasonal_energy_efficiency_ratio'].nil? min_seer = ac_props['minimum_seasonal_energy_efficiency_ratio'] cop = seer_to_cop_no_fan(min_seer) new_comp_name = "#{coil_cooling_dx_single_speed.name} #{capacity_kbtu_per_hr.round}kBtu/hr #{min_seer}SEER" OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.CoilCoolingDXSingleSpeed', "For #{template}: #{coil_cooling_dx_single_speed.name}: Capacity = #{capacity_kbtu_per_hr.round}kBtu/hr; SEER = #{min_seer}") end # If specified as EER unless ac_props['minimum_energy_efficiency_ratio'].nil? min_eer = ac_props['minimum_energy_efficiency_ratio'] cop = eer_to_cop_no_fan(min_eer) new_comp_name = "#{coil_cooling_dx_single_speed.name} #{capacity_kbtu_per_hr.round}kBtu/hr #{min_eer}EER" OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.CoilCoolingDXSingleSpeed', "For #{template}: #{coil_cooling_dx_single_speed.name}: Capacity = #{capacity_kbtu_per_hr.round}kBtu/hr; EER = #{min_eer}") end # if specified as SEER (heat pump) unless ac_props['minimum_seasonal_efficiency'].nil? min_seer = ac_props['minimum_seasonal_efficiency'] cop = seer_to_cop_no_fan(min_seer) new_comp_name = "#{coil_cooling_dx_single_speed.name} #{capacity_kbtu_per_hr.round}kBtu/hr #{min_seer}SEER" OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.CoilCoolingDXSingleSpeed', "For #{template}: #{coil_cooling_dx_single_speed.name}: Capacity = #{capacity_kbtu_per_hr.round}kBtu/hr; SEER = #{min_seer}") end # If specified as EER (heat pump) unless ac_props['minimum_full_load_efficiency'].nil? min_eer = ac_props['minimum_full_load_efficiency'] cop = eer_to_cop_no_fan(min_eer) new_comp_name = "#{coil_cooling_dx_single_speed.name} #{capacity_kbtu_per_hr.round}kBtu/hr #{min_eer}EER" OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.CoilCoolingDXSingleSpeed', "For #{template}: #{coil_cooling_dx_single_speed.name}: Capacity = #{capacity_kbtu_per_hr.round}kBtu/hr; EER = #{min_eer}") end # If specified as COP unless ac_props['minimum_coefficient_of_performance_cooling'].nil? cop = ac_props['minimum_coefficient_of_performance_cooling'] new_comp_name = "#{coil_cooling_dx_single_speed.name} #{capacity_kbtu_per_hr.round}kBtu/hr #{cop}COP" OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.CoilCoolingDXSingleSpeed', "For #{template}: #{coil_cooling_dx_single_speed.name}: Capacity = #{capacity_kbtu_per_hr.round}kBtu/hr; COP = #{cop}") end # Rename if rename coil_cooling_dx_single_speed.setName(new_comp_name) end # Set COP coil_cooling_dx_single_speed.setRatedCOP(cop.to_f) unless cop.nil? end
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Applies the performance curves “CoilCoolingDXSingleSpeed” object.
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 2012 def coil_cooling_dx_single_speed_apply_curves(coil_cooling_dx_single_speed, eqpt_name) successfully_set_all_properties = true search_criteria = {} search_criteria['name'] = eqpt_name # Get the capacity capacity_w = coil_cooling_dx_single_speed_find_capacity(coil_cooling_dx_single_speed) capacity_w = [1.0,capacity_w].max capacity_btu_per_hr = OpenStudio.convert(capacity_w, 'W', 'Btu/hr').get # Lookup efficiencies ac_props = model_find_object(standards_data['tables']['heat_pump_cooling_ecm']['table'], search_criteria, capacity_btu_per_hr) # Check to make sure properties were found if ac_props.nil? OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standard.CoilCoolingDXSingleSpeed', "For #{coil_cooling_dx_single_speed.name}, cannot find efficiency info using #{search_criteria}, cannot apply efficiency.") successfully_set_all_properties = false end # Make the COOL-CAP-FT curve cool_cap_ft = model_add_curve(coil_cooling_dx_single_speed.model, ac_props['cool_cap_ft']) if cool_cap_ft coil_cooling_dx_single_speed.setTotalCoolingCapacityFunctionOfTemperatureCurve(cool_cap_ft) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standard.CoilCoolingDXSingleSpeed', "For #{coil_cooling_dx_single_speed.name}, cannot find cool_cap_ft curve, will not be set.") successfully_set_all_properties = false end # Make the COOL-CAP-FFLOW curve cool_cap_fflow = model_add_curve(coil_cooling_dx_single_speed.model, ac_props['cool_cap_fflow']) if cool_cap_fflow coil_cooling_dx_single_speed.setTotalCoolingCapacityFunctionOfFlowFractionCurve(cool_cap_fflow) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standard.CoilCoolingDXSingleSpeed', "For #{coil_cooling_dx_single_speed.name}, cannot find cool_cap_fflow curve, will not be set.") successfully_set_all_properties = false end # Make the COOL-EIR-FT curve cool_eir_ft = model_add_curve(coil_cooling_dx_single_speed.model, ac_props['cool_eir_ft']) if cool_eir_ft coil_cooling_dx_single_speed.setEnergyInputRatioFunctionOfTemperatureCurve(cool_eir_ft) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilCoolingDXSingleSpeed', "For #{coil_cooling_dx_single_speed.name}, cannot find cool_eir_ft curve, will not be set.") successfully_set_all_properties = false end # Make the COOL-EIR-FFLOW curve cool_eir_fflow = model_add_curve(coil_cooling_dx_single_speed.model, ac_props['cool_eir_fflow']) if cool_eir_fflow coil_cooling_dx_single_speed.setEnergyInputRatioFunctionOfFlowFractionCurve(cool_eir_fflow) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilCoolingDXSingleSpeed', "For #{coil_cooling_dx_single_speed.name}, cannot find cool_eir_fflow curve, will not be set.") successfully_set_all_properties = false end # Make the COOL-PLF-FPLR curve cool_plf_fplr = model_add_curve(coil_cooling_dx_single_speed.model, ac_props['cool_plf_fplr']) if cool_plf_fplr coil_cooling_dx_single_speed.setPartLoadFractionCorrelationCurve(cool_plf_fplr) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilCoolingDXSingleSpeed', "For #{coil_cooling_dx_Single_speed.name}, cannot find cool_plf_fplr curve, will not be set.") successfully_set_all_properties = false end end
¶ ↑
Find efficiency for “CoilCoolingDXVariableSpeed” object
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 2754 def coil_cooling_dx_variable_speed_apply_cop(coil_cooling_dx_variable_speed, search_criteria, rename = false) capacity_w = coil_cooling_dx_variable_speed_find_capacity(coil_cooling_dx_variable_speed) capacity_btu_per_hr = OpenStudio.convert(capacity_w, 'W', 'Btu/hr').get capacity_kbtu_per_hr = OpenStudio.convert(capacity_w, 'W', 'kBtu/hr').get # Look up the efficiency characteristics ac_props = model_find_object(standards_data['tables']['heat_pump_cooling_ecm']['table'], search_criteria, capacity_btu_per_hr) # Check to make sure properties were found if ac_props.nil? OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilCoolingDXVariableSpeed', "For #{coil_cooling_dx_variable_speed.name}, cannot find efficiency info using #{search_criteria}.") successfully_set_all_properties = false return successfully_set_all_properties end # Get the minimum efficiency cop = nil # If specified as SEER unless ac_props['minimum_seasonal_energy_efficiency_ratio'].nil? min_seer = ac_props['minimum_seasonal_energy_efficiency_ratio'] cop = seer_to_cop_no_fan(min_seer) new_comp_name = "#{coil_cooling_dx_variable_speed.name} #{capacity_kbtu_per_hr.round}kBtu/hr #{min_seer}SEER" OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.CoilCoolingDXVariableSpeed', "For #{template}: #{coil_cooling_dx_variable_speed.name}: Capacity = #{capacity_kbtu_per_hr.round}kBtu/hr; SEER = #{min_seer}") end # If specified as EER unless ac_props['minimum_energy_efficiency_ratio'].nil? min_eer = ac_props['minimum_energy_efficiency_ratio'] cop = eer_to_cop_no_fan(min_eer) new_comp_name = "#{coil_cooling_dx_single_speed.name} #{capacity_kbtu_per_hr.round}kBtu/hr #{min_eer}EER" OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.CoilCoolingDXVariableSpeed', "For #{template}: #{coil_cooling_dx_variable_speed.name}: Capacity = #{capacity_kbtu_per_hr.round}kBtu/hr; EER = #{min_eer}") end # if specified as SEER (heat pump) unless ac_props['minimum_seasonal_efficiency'].nil? min_seer = ac_props['minimum_seasonal_efficiency'] cop = seer_to_cop_no_fan(min_seer) new_comp_name = "#{coil_cooling_dx_variable_speed.name} #{capacity_kbtu_per_hr.round}kBtu/hr #{min_seer}SEER" OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.CoilCoolingDXVariableSpeed', "For #{template}: #{coil_cooling_dx_variable_speed.name}: Capacity = #{capacity_kbtu_per_hr.round}kBtu/hr; SEER = #{min_seer}") end # If specified as EER (heat pump) unless ac_props['minimum_full_load_efficiency'].nil? min_eer = ac_props['minimum_full_load_efficiency'] cop = eer_to_cop_no_fan(min_eer) new_comp_name = "#{coil_cooling_dx_variable_speed.name} #{capacity_kbtu_per_hr.round}kBtu/hr #{min_eer}EER" OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.CoilCoolingDXVariableSpeed', "For #{template}: #{coil_cooling_dx_variable_speed.name}: Capacity = #{capacity_kbtu_per_hr.round}kBtu/hr; EER = #{min_eer}") end # If specified as COP unless ac_props['minimum_coefficient_of_performance_cooling'].nil? cop = ac_props['minimum_coefficient_of_performance_cooling'] new_comp_name = "#{coil_cooling_dx_variable_speed.name} #{capacity_kbtu_per_hr.round}kBtu/hr #{cop}COP" OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.CoilCoolingDXVariableSpeed', "For #{template}: #{coil_cooling_dx_variable_speed.name}: Capacity = #{capacity_kbtu_per_hr.round}kBtu/hr; COP = #{cop}") end # Rename if rename coil_cooling_dx_variable_speed.setName(new_comp_name) end # Set COP values coil_cooling_dx_variable_speed.speeds.each { |speed| speed.setReferenceUnitGrossRatedCoolingCOP(cop.to_f) } unless cop.nil? end
¶ ↑
Applies the performance curves “CoilCoolingDXVariableSpeed” object.
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 2217 def coil_cooling_dx_variable_speed_apply_curves(coil_cooling_dx_variable_speed, eqpt_name) successfully_set_all_properties = true # Get the capacity capacity_w = coil_cooling_dx_variable_speed_find_capacity(coil_cooling_dx_variable_speed) capacity_w = [1.0,capacity_w].max capacity_btu_per_hr = OpenStudio.convert(capacity_w, 'W', 'Btu/hr').get # Lookup performance curves search_criteria = {} search_criteria['name'] = eqpt_name ac_props = model_find_object(standards_data['tables']['heat_pump_cooling_ecm']['table'], search_criteria, capacity_btu_per_hr) # Check to make sure properties were found if ac_props.nil? OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standard.CoilCoolingDXVariableSpeed', "For #{coil_cooling_dx_variable_speed.name}, cannot find efficiency info using #{search_criteria}, cannot apply efficiency.") successfully_set_all_properties = false end # Make the COOL-CAP-FT curve cool_cap_ft = model_add_curve(coil_cooling_dx_variable_speed.model, ac_props['cool_cap_ft']) if cool_cap_ft coil_cooling_dx_variable_speed.speeds.each { |speed| speed.setTotalCoolingCapacityFunctionofTemperatureCurve(cool_cap_ft) } else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standard.CoilCoolingDXVariableSpeed', "For #{coil_cooling_dx_variable_speed.name}, cannot find cool_cap_ft curve, will not be set.") successfully_set_all_properties = false end # Make the COOL-CAP-FFLOW curve cool_cap_fflow = model_add_curve(coil_cooling_dx_variable_speed.model, ac_props['cool_cap_fflow']) if cool_cap_fflow coil_cooling_dx_variable_speed.speeds.each { |speed| speed.setTotalCoolingCapacityFunctionofAirFlowFractionCurve(cool_cap_fflow) } else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standard.CoilCoolingDXVariableSpeed', "For #{coil_cooling_dx_variable_speed.name}, cannot find cool_cap_fflow curve, will not be set.") successfully_set_all_properties = false end # Make the COOL-EIR-FT curve cool_eir_ft = model_add_curve(coil_cooling_dx_variable_speed.model, ac_props['cool_eir_ft']) if cool_eir_ft coil_cooling_dx_variable_speed.speeds.each { |speed| speed.setEnergyInputRatioFunctionofTemperatureCurve(cool_eir_ft) } else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilCoolingDXVariableSpeed', "For #{coil_cooling_dx_variable_speed.name}, cannot find cool_eir_ft curve, will not be set.") successfully_set_all_properties = false end # Make the COOL-EIR-FFLOW curve cool_eir_fflow = model_add_curve(coil_cooling_dx_variable_speed.model, ac_props['cool_eir_fflow']) if cool_eir_fflow coil_cooling_dx_variable_speed.speeds.each { |speed| speed.setEnergyInputRatioFunctionofAirFlowFractionCurve(cool_eir_fflow) } else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilCoolingDXVariableSpeed', "For #{coil_cooling_dx_variable_speed.name}, cannot find cool_eir_fflow curve, will not be set.") successfully_set_all_properties = false end # Make the COOL-PLF-FPLR curve cool_plf_fplr = model_add_curve(coil_cooling_dx_variable_speed.model, ac_props['cool_plf_fplr']) if cool_plf_fplr coil_cooling_dx_variable_speed.setEnergyPartLoadFractionCurve(cool_plf_fplr) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilCoolingDXVariableSpeed', "For #{coil_cooling_dx_variable_speed.name}, cannot find cool_plf_fplr curve, will not be set.") successfully_set_all_properties = false end end
¶ ↑
Find cooling capacity for “CoilCoolingDXVariableSpeed” object
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 3020 def coil_cooling_dx_variable_speed_find_capacity(coil_cooling_dx_variable_speed) capacity_w = nil if coil_cooling_dx_variable_speed.grossRatedTotalCoolingCapacityAtSelectedNominalSpeedLevel.is_initialized capacity_w = coil_cooling_dx_variable_speed.grossRatedTotalCoolingCapacityAtSelectedNominalSpeedLevel.get elsif coil_cooling_dx_variable_speed.autosizedGrossRatedTotalCoolingCapacityAtSelectedNominalSpeedLevel.is_initialized capacity_w = coil_cooling_dx_variable_speed.autosizedGrossRatedTotalCoolingCapacityAtSelectedNominalSpeedLevel.get else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilCoolingDXVariableSpeed', "For #{coil_cooling_dx_variable_speed.name} capacity is not available.") return 0.0 end return capacity_w end
¶ ↑
Find efficiency for “CoilHeatingDXSingleSpeed” object
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 2689 def coil_heating_dx_single_speed_apply_cop(coil_heating_dx_single_speed, search_criteria, rename = false) capacity_w = coil_heating_dx_single_speed_find_capacity(coil_heating_dx_single_speed) capacity_btu_per_hr = OpenStudio.convert(capacity_w, 'W', 'Btu/hr').get capacity_kbtu_per_hr = OpenStudio.convert(capacity_w, 'W', 'kBtu/hr').get # Look up the efficiency characteristics props = model_find_object(standards_data['tables']['heat_pump_heating_ecm'], search_criteria, capacity_btu_per_hr) # Check to make sure properties were found if props.nil? OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilHeatingDXSingleSpeed', "For #{coil_heating_dx_single_speed.name}, cannot find efficiency info using #{search_criteria}") successfully_set_all_properties = false return successfully_set_all_properties end # Get the minimum efficiency cop = nil # If specified as EER unless props['minimum_energy_efficiency_ratio'].nil? min_eer = props['minimum_energy_efficiency_ratio'] cop = eer_to_cop_no_fan(min_eer) new_comp_name = "#{coil_heating_dx_single_speed.name} #{capacity_kbtu_per_hr.round}kBtu/hr #{min_eer}EER" OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.CoilHeatingDXSingleSpeed', "For #{template}: #{coil_heating_dx_single_speed.name}: Capacity = #{capacity_kbtu_per_hr.round}kBtu/hr; EER = #{min_eer}") end # if specified as HSPF (heat pump) unless props['minimum_heating_seasonal_performance_factor'].nil? min_hspf = props['minimum_heating_seasonal_performance_factor'] cop = hspf_to_cop_no_fan(min_hspf) new_comp_name = "#{coil_heating_dx_single_speed.name} #{capacity_kbtu_per_hr.round}kBtu/hr #{min_seer}HSPF" OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.CoilHeatingDXSingleSpeed', "For #{template}: #{coil_heating_dx_single_speed.name}: Capacity = #{capacity_kbtu_per_hr.round}kBtu/hr; SEER = #{min_seer}") end # If specified as EER (heat pump) unless props['minimum_full_load_efficiency'].nil? min_eer = props['minimum_full_load_efficiency'] cop = eer_to_cop_no_fan(min_eer) new_comp_name = "#{coil_heating_dx_single_speed.name} #{capacity_kbtu_per_hr.round}kBtu/hr #{min_eer}EER" OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.CoilHeatingDXSingleSpeed', "For #{template}: #{coil_heating_dx_single_speed.name}: Capacity = #{capacity_kbtu_per_hr.round}kBtu/hr; EER = #{min_eer}") end # If specified as COP unless props['minimum_coefficient_of_performance_heating'].nil? cop_min = props['minimum_coefficient_of_performance_heating'] cop = cop_heating_to_cop_heating_no_fan(cop_min, capacity_w) new_comp_name = "#{coil_heating_dx_single_speed.name} #{capacity_kbtu_per_hr.round}kBtu/hr #{cop}COP" OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.CoilHeatingDXSingleSpeed', "For #{template}: #{coil_heating_dx_single_speed.name}: Capacity = #{capacity_kbtu_per_hr.round}kBtu/hr; EER = #{min_eer}") end # Rename if rename coil_heating_dx_single_speed.setName(new_comp_name) end # Set COP coil_heating_dx_single_speed.setRatedCOP(cop.to_f) unless cop.nil? end
¶ ↑
Applies the performance curves to “CoilHeatingSingleSpeed” object.
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 2082 def coil_heating_dx_single_speed_apply_curves(coil_heating_dx_single_speed, eqpt_name) successfully_set_all_properties = true # Get the search criteria search_criteria = {} search_criteria['name'] = eqpt_name # Get the capacity capacity_w = coil_heating_dx_single_speed_find_capacity(coil_heating_dx_single_speed) capacity_w = [1.0,capacity_w].max capacity_btu_per_hr = OpenStudio.convert(capacity_w, 'W', 'Btu/hr').get # Lookup efficiencies props = model_find_object(standards_data['tables']['heat_pump_heating_ecm']['table'], search_criteria, capacity_btu_per_hr) # Check to make sure properties were found if props.nil? OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilHeatingDXSingleSpeed', "For #{coil_heating_dx_single_speed.name}, cannot find efficiency info using #{search_criteria}.") successfully_set_all_properties = false end # Make the HEAT-CAP-FT curve heat_cap_ft = model_add_curve(coil_heating_dx_single_speed.model, props['heat_cap_ft']) if heat_cap_ft coil_heating_dx_single_speed.setTotalHeatingCapacityFunctionofTemperatureCurve(heat_cap_ft) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilHeatingDXSingleSpeed', "For #{coil_heating_dx_single_speed.name}, cannot find heat_cap_ft curve, will not be set.") successfully_set_all_properties = false end # Make the HEAT-CAP-FFLOW curve heat_cap_fflow = model_add_curve(coil_heating_dx_single_speed.model, props['heat_cap_fflow']) if heat_cap_fflow coil_heating_dx_single_speed.setTotalHeatingCapacityFunctionofFlowFractionCurve(heat_cap_fflow) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilHeatingDXSingleSpeed', "For #{coil_heating_dx_single_speed.name}, cannot find heat_cap_fflow curve, will not be set.") successfully_set_all_properties = false end # Make the HEAT-EIR-FT curve heat_eir_ft = model_add_curve(coil_heating_dx_single_speed.model, props['heat_eir_ft']) if heat_eir_ft coil_heating_dx_single_speed.setEnergyInputRatioFunctionofTemperatureCurve(heat_eir_ft) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilHeatingDXSingleSpeed', "For #{coil_heating_dx_single_speed.name}, cannot find heat_eir_ft curve, will not be set.") successfully_set_all_properties = false end # Make the HEAT-EIR-FFLOW curve heat_eir_fflow = model_add_curve(coil_heating_dx_single_speed.model, props['heat_eir_fflow']) if heat_eir_fflow coil_heating_dx_single_speed.setEnergyInputRatioFunctionofFlowFractionCurve(heat_eir_fflow) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilHeatingDXSingleSpeed', "For #{coil_heating_dx_single_speed.name}, cannot find heat_eir_fflow curve, will not be set.") successfully_set_all_properties = false end # Make the HEAT-PLF-FPLR curve heat_plf_fplr = model_add_curve(coil_heating_dx_single_speed.model, props['heat_plf_fplr']) if heat_plf_fplr coil_heating_dx_single_speed.setPartLoadFractionCorrelationCurve(heat_plf_fplr) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilHeatingDXSingleSpeed', "For #{coil_heating_dx_single_speed.name}, cannot find heat_plf_fplr curve, will not be set.") successfully_set_all_properties = false end # Make the HEAT-DEFROST-EIR-FT curve heat_defrost_eir_ft = model_add_curve(coil_heating_dx_single_speed.model, props['heat_defrost_eir_ft']) if heat_defrost_eir_ft coil_heating_dx_single_speed.setDefrostEnergyInputRatioFunctionofTemperatureCurve(heat_defrost_eir_ft) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilHeatingDXSingleSpeed', "For #{coil_heating_dx_single_speed.name}, can not find heat_defrost_eir_ft curve, will not be set.") successfully_set_all_properties = false end end
¶ ↑
Find efficiency for “CoilHeatingDXVariableSpeed” object
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 2826 def coil_heating_dx_variable_speed_apply_cop(coil_heating_dx_variable_speed, search_criteria, rename = false) capacity_w = coil_heating_dx_variable_speed_find_capacity(coil_heating_dx_variable_speed) capacity_btu_per_hr = OpenStudio.convert(capacity_w, 'W', 'Btu/hr').get capacity_kbtu_per_hr = OpenStudio.convert(capacity_w, 'W', 'kBtu/hr').get # Look up the efficiency characteristics props = model_find_object(standards_data['tables']['heat_pump_heating_ecm'], search_criteria, capacity_btu_per_hr) # Check to make sure properties were found if props.nil? OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilHeatingDXVariableSpeed', "For #{coil_heating_dx_variable_speed.name}, cannot find efficiency info using #{search_criteria}.") successfully_set_all_properties = false return successfully_set_all_properties end # Get the minimum efficiency cop = nil # If specified as EER unless props['minimum_energy_efficiency_ratio'].nil? min_eer = props['minimum_energy_efficiency_ratio'] cop = eer_to_cop_no_fan(min_eer) new_comp_name = "#{coil_heating_dx_variable_speed.name} #{capacity_kbtu_per_hr.round}kBtu/hr #{min_eer}EER" OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.CoilHeatingDXVariableSpeed', "For #{template}: #{coil_heating_dx_variable_speed.name}: Capacity = #{capacity_kbtu_per_hr.round}kBtu/hr; EER = #{min_eer}") end # if specified as HSPF (heat pump) unless props['minimum_heating_seasonal_performance_factor'].nil? min_hspf = props['minimum_heating_seasonal_performance_factor'] cop = hspf_to_cop_no_fan(min_hspf) new_comp_name = "#{coil_heating_dx_variable_speed.name} #{capacity_kbtu_per_hr.round}kBtu/hr #{min_seer}HSPF" OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.CoilHeatingDXVariableSpeed', "For #{template}: #{coil_heating_dx_variable_speed.name}: Capacity = #{capacity_kbtu_per_hr.round}kBtu/hr; SEER = #{min_seer}") end # If specified as EER (heat pump) unless props['minimum_full_load_efficiency'].nil? min_eer = props['minimum_full_load_efficiency'] cop = eer_to_cop_no_fan(min_eer) new_comp_name = "#{coil_heating_dx_variable_speed.name} #{capacity_kbtu_per_hr.round}kBtu/hr #{min_eer}EER" OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.CoilHeatingDXVariableSpeed', "For #{template}: #{coil_heating_dx_variable_speed.name}: Capacity = #{capacity_kbtu_per_hr.round}kBtu/hr; EER = #{min_eer}") end # If specified as COP unless props['minimum_coefficient_of_performance_heating'].nil? min_cop = props['minimum_coefficient_of_performance_heating'] cop = cop_heating_to_cop_heating_no_fan(min_cop, capacity_w) new_comp_name = "#{coil_heating_dx_variable_speed.name} #{capacity_kbtu_per_hr.round}kBtu/hr #{cop}COP" OpenStudio.logFree(OpenStudio::Info, 'openstudio.standards.CoilHeatingDXVariableSpeed', "For #{template}: #{coil_heating_dx_variable_speed.name}: Capacity = #{capacity_kbtu_per_hr.round}kBtu/hr; EER = #{min_eer}") end # Rename if rename coil_heating_dx_variable_speed.setName(new_comp_name) end # Set COP values coil_heating_dx_variable_speed.speeds.each { |speed| speed.setReferenceUnitGrossRatedHeatingCOP(cop.to_f) } unless cop.nil? end
¶ ↑
Applies performance curves to “CoilHeatingVariableSpeed” object.
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 2285 def coil_heating_dx_variable_speed_apply_curves(coil_heating_dx_variable_speed, eqpt_name) successfully_set_all_properties = true # Get the search criteria search_criteria = {} search_criteria['name'] = eqpt_name # Get the capacity capacity_w = coil_heating_dx_variable_speed_find_capacity(coil_heating_dx_variable_speed) capacity_w = [1.0,capacity_w].max capacity_btu_per_hr = OpenStudio.convert(capacity_w, 'W', 'Btu/hr').get # Lookup performance curves props = model_find_object(standards_data['tables']['heat_pump_heating_ecm']['table'], search_criteria, capacity_btu_per_hr) # Check to make sure properties were found if props.nil? OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilHeatingDXVariableSpeed', "For #{coil_heating_dx_variable_speed.name}, cannot find efficiency info using #{search_criteria}.") successfully_set_all_properties = false end # Make the HEAT-CAP-FT curve heat_cap_ft = model_add_curve(coil_heating_dx_variable_speed.model, props['heat_cap_ft']) if heat_cap_ft coil_heating_dx_variable_speed.speeds.each { |speed| speed.setHeatingCapacityFunctionofTemperatureCurve(heat_cap_ft) } else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilHeatingDXVariableSpeed', "For #{coil_heating_dx_variable_speed.name}, cannot find heat_cap_ft curve, will not be set.") successfully_set_all_properties = false end # Make the HEAT-CAP-FFLOW curve heat_cap_fflow = model_add_curve(coil_heating_dx_variable_speed.model, props['heat_cap_fflow']) if heat_cap_fflow coil_heating_dx_variable_speed.speeds.each { |speed| speed.setTotalHeatingCapacityFunctionofAirFlowFractionCurve(heat_cap_fflow) } else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilHeatingDXVariableSpeed', "For #{coil_heating_dx_variable_speed.name}, cannot find heat_cap_fflow curve, will not be set.") successfully_set_all_properties = false end # Make the HEAT-EIR-FT curve heat_eir_ft = model_add_curve(coil_heating_dx_variable_speed.model, props['heat_eir_ft']) if heat_eir_ft coil_heating_dx_variable_speed.speeds.each { |speed| speed.setEnergyInputRatioFunctionofTemperatureCurve(heat_eir_ft) } else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilHeatingDXVariableSingleSpeed', "For #{coil_heating_dx_variable_speed.name}, cannot find heat_eir_ft curve, will not be set.") successfully_set_all_properties = false end # Make the HEAT-EIR-FFLOW curve heat_eir_fflow = model_add_curve(coil_heating_dx_variable_speed.model, props['heat_eir_fflow']) if heat_eir_fflow coil_heating_dx_variable_speed.speeds.each { |speed| speed.setEnergyInputRatioFunctionofAirFlowFractionCurve(heat_eir_fflow) } else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilHeatingDXVariableSpeed', "For #{coil_heating_dx_variable_speed.name}, cannot find heat_eir_fflow curve, will not be set.") successfully_set_all_properties = false end # Make the HEAT-PLF-FPLR curve heat_plf_fplr = model_add_curve(coil_heating_dx_variable_speed.model, props['heat_plf_fplr']) if heat_plf_fplr coil_heating_dx_variable_speed.setEnergyPartLoadFractionCurve(heat_plf_fplr) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilHeatingDXVariableSpeed', "For #{coil_heating_dx_variable_speed.name}, cannot find heat_plf_fplr curve, will not be set.") successfully_set_all_properties = false end # Make the heat_defrost_eir_ft heat_defrost_eir_ft = model_add_curve(coil_heating_dx_variable_speed.model, props['heat_defrost_eir_ft']) if heat_defrost_eir_ft coil_heating_dx_variable_speed.setDefrostEnergyInputRatioFunctionofTemperatureCurve(heat_defrost_eir_ft) else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilHeatingDXVariableSpeed', "For #{coil_heating_dx_variable_speed.name}, cannot find heat_defrost_eir_ft curve, will not be set") successfully_set_all_properties = false end end
¶ ↑
Find heating capacity for “CoilHeatingDXVariableSpeed” object
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 3036 def coil_heating_dx_variable_speed_find_capacity(coil_heating_dx_variable_speed) capacity_w = nil if coil_heating_dx_variable_speed.ratedHeatingCapacityAtSelectedNominalSpeedLevel.is_initialized capacity_w = coil_heating_dx_variable_speed.ratedHeatingCapacityAtSelectedNominalSpeedLevel.get elsif coil_heating_dx_variable_speed.autosizedRatedHeatingCapacityAtSelectedNominalSpeedLevel.is_initialized capacity_w = coil_heating_dx_variable_speed.autosizedRatedHeatingCapacityAtSelectedNominalSpeedLevel.get else OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.CoilHeatingDXVariableSpeed', "For #{coil_heating_dx_variable_speed.name} capacity is not available.") return 0.0 end return capacity_w end
¶ ↑
create air system cooling equipment
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 712 def create_air_sys_clg_eqpt(model, clg_eqpt_type) clg_eqpt = nil case clg_eqpt_type.downcase when 'ashp' clg_eqpt = OpenStudio::Model::CoilCoolingDXSingleSpeed.new(model) clg_eqpt.setName('CoilCoolingDxSingleSpeed_ASHP') clg_eqpt.setCrankcaseHeaterCapacity(1.0e-6) when 'ccashp' clg_eqpt = OpenStudio::Model::CoilCoolingDXVariableSpeed.new(model) clg_eqpt.setName('CoilCoolingDXVariableSpeed_CCASHP') clg_eqpt_speed1 = OpenStudio::Model::CoilCoolingDXVariableSpeedSpeedData.new(model) clg_eqpt.addSpeed(clg_eqpt_speed1) clg_eqpt.setNominalSpeedLevel(1) clg_eqpt.setCrankcaseHeaterCapacity(1.0e-6) when 'coil_chw' clg_eqpt = OpenStudio::Model::CoilCoolingWater.new(model) clg_eqpt.setName('CoilCoolingWater') when 'vrf' clg_eqpt = OpenStudio::Model::CoilCoolingDXVariableRefrigerantFlow.new(model) clg_eqpt.setName('CoilCoolingDXVariableRefrigerantFlow') end return clg_eqpt end
¶ ↑
create air system fan
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 693 def create_air_sys_fan(model, fan_type) fan = nil case fan_type.downcase when 'constant_volume' fan = OpenStudio::Model::FanConstantVolume.new(model) fan.setName('FanConstantVolume') when 'variable_volume' fan = OpenStudio::Model::FanVariableVolume.new(model) fan.setName('FanVariableVolume') when 'on_off' fan = OpenStudio::Model::FanOnOff.new(model) fan.setName('FanOnOff') end return fan end
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create air system heating equipment
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 739 def create_air_sys_htg_eqpt(model, htg_eqpt_type) always_on = model.alwaysOnDiscreteSchedule htg_eqpt = nil case htg_eqpt_type.downcase when 'coil_electric' htg_eqpt = OpenStudio::Model::CoilHeatingElectric.new(model, always_on) htg_eqpt.setName('CoilHeatingElectric') when 'coil_gas' htg_eqpt = OpenStudio::Model::CoilHeatingGas.new(model, always_on) htg_eqpt.setName('CoilHeatingGas') when 'ashp' htg_eqpt = OpenStudio::Model::CoilHeatingDXSingleSpeed.new(model) htg_eqpt.setName('CoilHeatingDXSingleSpeed_ASHP') htg_eqpt.setDefrostStrategy('ReverseCycle') htg_eqpt.setDefrostControl('OnDemand') htg_eqpt.setCrankcaseHeaterCapacity(1.0e-6) when 'ccashp' htg_eqpt = OpenStudio::Model::CoilHeatingDXVariableSpeed.new(model) htg_eqpt.setName('CoilHeatingDXVariableSpeed_CCASHP') htg_eqpt_speed1 = OpenStudio::Model::CoilHeatingDXVariableSpeedSpeedData.new(model) htg_eqpt.addSpeed(htg_eqpt_speed1) htg_eqpt.setNominalSpeedLevel(1) htg_eqpt.setMinimumOutdoorDryBulbTemperatureforCompressorOperation(-25.0) htg_eqpt.setDefrostStrategy('ReverseCycle') htg_eqpt.setDefrostControl('OnDemand') htg_eqpt.setCrankcaseHeaterCapacity(1.0e-6) when 'coil_hw' htg_eqpt = OpenStudio::Model::CoilHeatingWater.new(model) htg_eqpt.setName('CoilHeatingWater') end return htg_eqpt end
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create air system setpoint manager
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 667 def create_air_sys_spm(model, setpoint_mgr_type, zones) spm = nil case setpoint_mgr_type.downcase when 'scheduled' sat = 20.0 sat_sch = OpenStudio::Model::ScheduleRuleset.new(model) sat_sch.defaultDaySchedule.addValue(OpenStudio::Time.new(0, 24, 0, 0), sat) spm = OpenStudio::Model::SetpointManagerScheduled.new(model, sat_sch) when 'single_zone_reheat' spm = OpenStudio::Model::SetpointManagerSingleZoneReheat.new(model) spm.setControlZone(zones[0]) spm.setMinimumSupplyAirTemperature(13.0) spm.setMaximumSupplyAirTemperature(43.0) when 'warmest' spm = OpenStudio::Model::SetpointManagerWarmest.new(model) spm.setMinimumSetpointTemperature(13.0) spm.setMaximumSetpointTemperature(22.0) end return spm end
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create air loop
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 628 def create_airloop(model, sys_vent_type) airloop = OpenStudio::Model::AirLoopHVAC.new(model) airloop.sizingSystem.setPreheatDesignTemperature(7.0) airloop.sizingSystem.setPreheatDesignHumidityRatio(0.008) airloop.sizingSystem.setPrecoolDesignTemperature(13.0) airloop.sizingSystem.setPrecoolDesignHumidityRatio(0.008) airloop.sizingSystem.setSizingOption('NonCoincident') airloop.sizingSystem.setCoolingDesignAirFlowMethod('DesignDay') airloop.sizingSystem.setCoolingDesignAirFlowRate(0.0) airloop.sizingSystem.setHeatingDesignAirFlowMethod('DesignDay') airloop.sizingSystem.setHeatingDesignAirFlowRate(0.0) airloop.sizingSystem.setSystemOutdoorAirMethod('ZoneSum') airloop.sizingSystem.setCentralCoolingDesignSupplyAirHumidityRatio(0.0085) airloop.sizingSystem.setCentralHeatingDesignSupplyAirHumidityRatio(0.0080) if model.version < OpenStudio::VersionString.new('2.7.0') airloop.sizingSystem.setMinimumSystemAirFlowRatio(1.0) else airloop.sizingSystem.setCentralHeatingMaximumSystemAirFlowRatio(1.0) end case sys_vent_type.downcase when 'doas' airloop.sizingSystem.setAllOutdoorAirinCooling(true) airloop.sizingSystem.setAllOutdoorAirinHeating(true) airloop.sizingSystem.setTypeofLoadtoSizeOn('VentilationRequirement') airloop.sizingSystem.setCentralCoolingDesignSupplyAirTemperature(13.0) airloop.sizingSystem.setCentralHeatingDesignSupplyAirTemperature(22.0) when 'mixed' airloop.sizingSystem.setAllOutdoorAirinCooling(false) airloop.sizingSystem.setAllOutdoorAirinHeating(false) airloop.sizingSystem.setTypeofLoadtoSizeOn('Sensible') airloop.sizingSystem.setCentralCoolingDesignSupplyAirTemperature(13.0) airloop.sizingSystem.setCentralHeatingDesignSupplyAirTemperature(43.0) end return airloop end
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add plant loop cooling eqpt
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 1060 def create_plantloop_clg_eqpt(model, loop_clg_eqpt_type) clg_eqpt = nil case loop_clg_eqpt_type.downcase when "chiller_electric_eir" clg_eqpt = OpenStudio::Model::ChillerElectricEIR.new(model) clg_eqpt.setName("ChillerElectricEIR") when "district_cooling" clg_eqpt = OpenStudio::Model::DistrictCooling.new(model) clg_eqpt.setName("DistrictCooling") when "heatpump_watertowater_equationfit" clg_eqpt = OpenStudio::Model::HeatPumpWaterToWaterEquationFitCooling.new(model) clg_eqpt.setName("HeatPumpWaterToWaterEquationFitCooling") end return clg_eqpt end
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add plant loop heat rejection equipment
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 1101 def create_plantloop_heat_rej_eqpt(model, loop_heat_rej_eqpt_type) heat_rej_eqpt = nil case loop_heat_rej_eqpt_type.downcase when "tower_single_speed" heat_rej_eqpt = OpenStudio::Model::CoolingTowerSingleSpeed.new(model) heat_rej_eqpt.setName("CoolingTowerSingleSpeed") when "vertical_ground_hx" heat_rej_eqpt = OpenStudio::Model::GroundHeatExchangerVertical.new(model) heat_rej_eqpt.setName("GroundHeatExchangerVertical") when "district_heating" if model.version < OpenStudio::VersionString.new('3.7.0') heat_rej_eqpt = OpenStudio::Model::DistrictHeating.new(model) else heat_rej_eqpt = OpenStudio::Model::DistrictHeatingWater.new(model) end heat_rej_eqpt.setName("DistrictHeating") when "district_cooling" heat_rej_eqpt = OpenStudio::Model::DistrictCooling.new(model) heat_rej_eqpt.setName("DistrictCooling") end return heat_rej_eqpt end
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add plant loop heating eqpt created by: kamel.haddad@nrcan-rncan.gc.ca (August 2021)
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 1038 def create_plantloop_htg_eqpt(model, loop_htg_eqpt_type) htg_eqpt = nil case loop_htg_eqpt_type.downcase when "district_heating" if model.version < OpenStudio::VersionString.new('3.7.0') htg_eqpt = OpenStudio::Model::DistrictHeating.new(model) else htg_eqpt = OpenStudio::Model::DistrictHeatingWater.new(model) end htg_eqpt.setName("DistrictHeating") when "heatpump_watertowater_equationfit" htg_eqpt = OpenStudio::Model::HeatPumpWaterToWaterEquationFitHeating.new(model) htg_eqpt.setName("HeatPumpWaterToWaterEquationFitHeating") end return htg_eqpt end
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add plant loop pump
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 1020 def create_plantloop_pump(model, loop_pump_type) pump = nil case loop_pump_type.downcase when "constant_speed" pump = OpenStudio::Model::PumpConstantSpeed.new(model) pump.setName("PumpConstantSpeed") when "variable_speed" pump = OpenStudio::Model::PumpVariableSpeed.new(model) pump.setName("PumpVariableSpeed") end return pump end
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add plant loop setpoint manager
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 1081 def create_plantloop_spm( model, loop_spm_type, loop_setpoint) spm = nil case loop_spm_type.downcase when "scheduled" sch = OpenStudio::Model::ScheduleConstant.new(model) sch.setValue(loop_setpoint) spm = OpenStudio::Model::SetpointManagerScheduled.new(model,sch) spm.setName("SetpointManagerScheduled") when "followgroundtemperature" spm = OpenStudio::Model::SetpointManagerFollowGroundTemperature.new(model) spm.setReferenceGroundTemperatureObjectType("Site:GroundTemperature:Deep") spm.setMinimumSetpointTemperature(0.0) end return spm end
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create zonal cooling equipment
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 884 def create_zone_clg_eqpt(model, zone_clg_eqpt_type) always_on = model.alwaysOnDiscreteSchedule clg_eqpt = nil case zone_clg_eqpt_type.downcase when 'fancoil_4pipe' clg_eqpt = OpenStudio::Model::CoilCoolingWater.new(model) clg_eqpt.setName('CoilCoolingWater_FanCoil') when 'ptac_electric_off', 'pthp' clg_eqpt = OpenStudio::Model::CoilCoolingDXSingleSpeed.new(model) clg_eqpt.setName('CoilCoolingDXSingleSpeed_PTHP') if zone_clg_eqpt_type.downcase == 'pthp' clg_eqpt.setName('CoilCoolingDXSingleSpeed_PTAC') if zone_clg_eqpt_type.downcase == 'ptac_electric_off' clg_eqpt.setCrankcaseHeaterCapacity(1.0e-6) when 'vrf' clg_eqpt = OpenStudio::Model::CoilCoolingDXVariableRefrigerantFlow.new(model) clg_eqpt.setName('CoilCoolingDXVariableRefrigerantFlow') end return clg_eqpt end
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create zpne container eqpt
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 906 def create_zone_container_eqpt(model:, zone_cont_eqpt_type:, zone_htg_eqpt:, zone_supp_htg_eqpt:, zone_clg_eqpt:, zone_fan:, zone_vent_off: true) always_on = model.alwaysOnDiscreteSchedule always_off = model.alwaysOffDiscreteSchedule zone_eqpt = nil case zone_cont_eqpt_type.downcase when 'fancoil_4pipe' zone_eqpt = OpenStudio::Model::ZoneHVACFourPipeFanCoil.new(model, always_on, zone_fan, zone_clg_eqpt, zone_htg_eqpt) zone_eqpt.setName('ZoneHVACFourPipeFanCoil') zone_eqpt.setSupplyAirFanOperatingModeSchedule(always_off) zone_eqpt.setMaximumOutdoorAirFlowRate(1.0e-6) when 'ptac_electric_off' zone_eqpt = OpenStudio::Model::ZoneHVACPackagedTerminalAirConditioner.new(model, always_on, zone_fan, zone_htg_eqpt, zone_clg_eqpt) zone_eqpt.setName('ZoneHVACPackagedTerminalAirConditioner') zone_eqpt.setSupplyAirFanOperatingModeSchedule(always_off) if zone_vent_off zone_eqpt.setOutdoorAirFlowRateDuringCoolingOperation(1.0e-6) zone_eqpt.setOutdoorAirFlowRateDuringHeatingOperation(1.0e-6) zone_eqpt.setOutdoorAirFlowRateWhenNoCoolingorHeatingisNeeded(1.0e-6) end when 'pthp' zone_eqpt = OpenStudio::Model::ZoneHVACPackagedTerminalHeatPump.new(model, always_on, zone_fan, zone_htg_eqpt, zone_clg_eqpt, zone_supp_htg_eqpt) zone_eqpt.setName('ZoneHVACPackagedTerminalHeatPump') if zone_vent_off zone_eqpt.setOutdoorAirFlowRateDuringCoolingOperation(1.0e-6) zone_eqpt.setOutdoorAirFlowRateDuringHeatingOperation(1.0e-6) zone_eqpt.setOutdoorAirFlowRateWhenNoCoolingorHeatingisNeeded(1.0e-6) zone_eqpt.setSupplyAirFanOperatingModeSchedule(always_off) end when 'unitheater_electric' zone_eqpt = OpenStudio::Model::ZoneHVACUnitHeater.new(model, always_on, zone_fan, zone_htg_eqpt) zone_eqpt.setName('ZoneHVACUnitHeater') zone_eqpt.setFanControlType('OnOff') when 'vrf' zone_eqpt = OpenStudio::Model::ZoneHVACTerminalUnitVariableRefrigerantFlow.new(model, zone_clg_eqpt, zone_htg_eqpt, zone_fan) zone_eqpt.setName('ZoneHVACTerminalUnitVariableRefrigerantFlow') zone_eqpt.setSupplyAirFanOperatingModeSchedule(always_off) if zone_vent_off zone_eqpt.setOutdoorAirFlowRateDuringCoolingOperation(1.0e-6) zone_eqpt.setOutdoorAirFlowRateDuringHeatingOperation(1.0e-6) zone_eqpt.setOutdoorAirFlowRateWhenNoCoolingorHeatingisNeeded(1.0e-6) zone_eqpt.setZoneTerminalUnitOffParasiticElectricEnergyUse(1.0e-6) zone_eqpt.setZoneTerminalUnitOnParasiticElectricEnergyUse(1.0e-6) end end return zone_eqpt end
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create zone diffuser
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 828 def create_zone_diffuser(model, zone_diffuser_type, zone) always_on = model.alwaysOnDiscreteSchedule diffuser = nil case zone_diffuser_type.downcase when 'single_duct_uncontrolled' diffuser = OpenStudio::Model::AirTerminalSingleDuctUncontrolled.new(model, always_on) when 'single_duct_vav_reheat' reheat_coil = OpenStudio::Model::CoilHeatingElectric.new(model, always_on) diffuser = OpenStudio::Model::AirTerminalSingleDuctVAVReheat.new(model, always_on, reheat_coil) # diffuser.setFixedMinimumAirFlowRate(0.002 * zone.floorArea ) diffuser.setMaximumReheatAirTemperature(43.0) diffuser.setDamperHeatingAction('Normal') end return diffuser end
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create zonal heating equipment
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 847 def create_zone_htg_eqpt(model, zone_htg_eqpt_type, hw_loop) always_on = model.alwaysOnDiscreteSchedule always_off = model.alwaysOffDiscreteSchedule htg_eqpt = nil case zone_htg_eqpt_type.downcase when 'baseboard_electric' htg_eqpt = OpenStudio::Model::ZoneHVACBaseboardConvectiveElectric.new(model) htg_eqpt.setName('ZoneHVACBaseboardConvectiveElectric') when 'baseboard_hotwater' htg_coil = OpenStudio::Model::CoilHeatingWaterBaseboard.new(model) htg_coil.setName("CoilHeatingWaterBaseboard") hw_loop.addDemandBranchForComponent(htg_coil) htg_eqpt = OpenStudio::Model::ZoneHVACBaseboardConvectiveWater.new(model, model.alwaysOnDiscreteSchedule, htg_coil) htg_eqpt.setName('ZoneHVACBaseboardConvectiveWater') when 'coil_electric', 'ptac_electric_off', 'unitheater_electric' htg_eqpt = OpenStudio::Model::CoilHeatingElectric.new(model, always_on) htg_eqpt.setName('CoilHeatingElectric') htg_eqpt.setAvailabilitySchedule(always_off) if zone_htg_eqpt_type == 'ptac_electric_off' when 'fancoil_4pipe' htg_eqpt = OpenStudio::Model::CoilHeatingWater.new(model) htg_eqpt.setName('CoilHeatingWater_FanCoil') when 'pthp' htg_eqpt = OpenStudio::Model::CoilHeatingDXSingleSpeed.new(model) htg_eqpt.setName('CoilHeatingDXSingleSpeed_PTHP') htg_eqpt.setDefrostStrategy('ReverseCycle') htg_eqpt.setDefrostControl('OnDemand') htg_eqpt.setCrankcaseHeaterCapacity(1.0e-6) when 'vrf' htg_eqpt = OpenStudio::Model::CoilHeatingDXVariableRefrigerantFlow.new(model) htg_eqpt.setName('CoilHeatingDXVariableRefrigerantFlow') end return htg_eqpt end
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# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 3560 def find_chiller_set(chiller_type:, ref_capacity_w:) if chiller_type.is_a?(String) ##### Find the chiller that has the required capacity search_criteria = {} search_criteria['name'] = chiller_type capacity_w = ref_capacity_w chiller_packages = model_find_object(@standards_data['tables']['chiller_eff_ecm'], search_criteria, capacity_w) chiller_name = chiller_packages['notes'] ecm_name = chiller_name chiller_set = { 'notes' => ecm_name, 'capacity_w' => chiller_packages['capacity_w'], 'cop_w_by_w' => chiller_packages['cop_w_by_w'], 'ref_leaving_chilled_water_temp_c' => chiller_packages['ref_leaving_chilled_water_temp_c'], 'ref_entering_condenser_fluid_temp_c' => chiller_packages['ref_entering_condenser_fluid_temp_c'], 'ref_chilled_water_flow_rate_m3_s' => chiller_packages['ref_chilled_water_flow_rate_m3_s'], 'ref_condenser_fluid_flow_rate_m3_s' => chiller_packages['ref_condenser_fluid_flow_rate_m3_s'], 'capft_curve' => chiller_packages['capft_curve'], 'eirft_curve' => chiller_packages['eirft_curve'], 'eirfplr_curve' => chiller_packages['eirfplr_curve'], 'min_part_load_ratio' => chiller_packages['min_part_load_ratio'], 'max_part_load_ratio' => chiller_packages['max_part_load_ratio'], 'opt_part_load_ratio' => chiller_packages['opt_part_load_ratio'], 'min_unloading_ratio' => chiller_packages['min_unloading_ratio'], 'condenser_type' => chiller_packages['condenser_type'], 'fraction_of_compressor_electric_consumption_rejected_by_condenser' => chiller_packages['fraction_of_compressor_electric_consumption_rejected_by_condenser'], 'leaving_chilled_water_lower_temperature_limit_c' => chiller_packages['leaving_chilled_water_lower_temperature_limit_c'], 'chiller_flow_mode' => chiller_packages['chiller_flow_mode'], 'design_heat_recovery_water_flow_rate_m3_s' => chiller_packages['design_heat_recovery_water_flow_rate_m3_s'] } chiller_min_cap = chiller_packages['minimum_capacity'] chiller_max_cap = chiller_packages['maximum_capacity'] end return chiller_set, chiller_min_cap, chiller_max_cap end
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Name of HVAC component might have been updated by standards methods for setting efficiency. Here original name of the component is restored.
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 1618 def get_hvac_comp_init_name(obj, htg_flag) return obj.name.to_s if obj.name.to_s.split.size <= 2 init_name = obj.name.to_s.split[0] range = obj.name.to_s.split.size - 3 range = obj.name.to_s.split.size - 5 if htg_flag for i in 1..range init_name += " #{obj.name.to_s.split[i]}" end return init_name end
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Return x,y,z coordinates of exterior wall with largest area on the lowest floor
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 138 def get_lowest_floor_ext_wall_centroid_coords(storeys_clg_zcoords) ext_wall = nil ext_wall_x = nil ext_wall_y = nil ext_wall_z = nil storeys_clg_zcoords.keys.each do |storey| max_area = 0.0 sorted_spaces = storey.spaces.sort_by { |space| space.name.to_s } sorted_spaces.each do |space| ext_walls = space.surfaces.select { |surf| (surf.surfaceType.to_s.upcase == 'WALL') && (surf.outsideBoundaryCondition.to_s.upcase == 'OUTDOORS') } ext_walls = ext_walls.sort_by { |wall| wall.grossArea.to_f } if !ext_walls.empty? if ext_walls.last.grossArea.to_f > max_area max_area = ext_walls.last.grossArea.to_f ext_wall_x = ext_walls.last.centroid.x.to_f + space.xOrigin.to_f ext_wall_y = ext_walls.last.centroid.y.to_f + space.yOrigin.to_f ext_wall_z = ext_walls.last.centroid.z.to_f + space.zOrigin.to_f ext_wall = ext_walls.last end end end break unless !ext_wall end if !ext_wall OpenStudio.logFree(OpenStudio::Info, 'openstudiostandards.get_lowest_floor_ext_wall_centroid_coords', 'Did not find an exteior wall in the building!') end return ext_wall_x, ext_wall_y, ext_wall_z end
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Return map of systems to zones and set flag for dedicated outdoor air unit for each system
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 67 def get_map_systems_to_zones(systems) map_systems_to_zones = {} system_doas_flags = {} systems.each do |system| zones = system.thermalZones map_systems_to_zones[system.name.to_s] = zones if system.sizingSystem.typeofLoadtoSizeOn.to_s == 'VentilationRequirement' system_doas_flags[system.name.to_s] = true else system_doas_flags[system.name.to_s] = false end end return map_systems_to_zones, system_doas_flags end
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Determine maximum equivalent and net vertical pipe runs for VRF model
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 220 def get_max_vrf_pipe_lengths(model) # Get and sort floors average ceilings z-coordinates hash storeys_clg_zcoords = get_storey_avg_clg_zcoords(model) storeys_clg_zcoords = storeys_clg_zcoords.sort_by { |key, value| value[1] }.to_h # sort storeys hash based on ceiling/roof z-coordinate if storeys_clg_zcoords.values.last[0] # If the top floor is conditioned, then assume the top floor is not an attic floor and place the VRF outdoor unit at the roof centroid location_cent_x, location_cent_y, location_cent_z = get_roof_centroid_coords(storeys_clg_zcoords.keys.last) else # If the top floor is not conditioned, then assume it's an attic floor. In this case place the VRF outdoor unit next to the centroid # of the exterior wall with the largest area on the lowest floor. location_cent_x, location_cent_y, location_cent_z = get_lowest_floor_ext_wall_centroid_coords(storeys_clg_zcoords) end # Initialize distances max_equiv_distance = 0.0 max_vert_distance = 0.0 min_vert_distance = 0.0 storeys_clg_zcoords.keys.each do |storey| next unless storeys_clg_zcoords[storey][0] storey.spaces.each do |space| # Is there a VRF terminal unit in the space/zone? vrf_term_units = [] if space.thermalZone.is_initialized vrf_term_units = space.thermalZone.get.equipment.select { |eqpt| eqpt.to_ZoneHVACTerminalUnitVariableRefrigerantFlow.is_initialized } end next if vrf_term_units.empty? space_centroid_x, space_centroid_y, space_centroid_z = get_space_centroid_coords(space) # Update max horizontal and vertical distances if needed equiv_distance = (location_cent_x.to_f - space_centroid_x.to_f).abs + (location_cent_y.to_f - space_centroid_y.to_f).abs + (location_cent_z.to_f - space_centroid_z.to_f).abs if equiv_distance > max_equiv_distance then max_equiv_distance = equiv_distance end pos_vert_distance = [space_centroid_z.to_f - location_cent_z.to_f, 0.0].max if pos_vert_distance > max_vert_distance then max_vert_distance = pos_vert_distance end neg_vert_distance = [space_centroid_z.to_f - location_cent_z.to_f, 0.0].min if neg_vert_distance < min_vert_distance then min_vert_distance = neg_vert_distance end end end max_net_vert_distance = max_vert_distance + min_vert_distance return max_equiv_distance, max_net_vert_distance end
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Return x,y,z coordinates of the centroid of the roof of the storey
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 190 def get_roof_centroid_coords(storey) sum_x = 0.0 sum_y = 0.0 sum_z = 0.0 total_area = 0.0 cent_x = nil cent_y = nil cent_z = nil storey.spaces.each do |space| roof_surfaces = space.surfaces.select { |surf| (surf.surfaceType.to_s.upcase == 'ROOFCEILING') && (surf.outsideBoundaryCondition.to_s.upcase == 'OUTDOORS') } roof_surfaces.each do |surf| sum_x += (surf.centroid.x.to_f + space.xOrigin.to_f) * surf.grossArea.to_f sum_y += (surf.centroid.y.to_f + space.yOrigin.to_f) * surf.grossArea.to_f sum_z += (surf.centroid.z.to_f + space.zOrigin.to_f) * surf.grossArea.to_f total_area += surf.grossArea.to_f end end if total_area > 0.0 cent_x = sum_x / total_area cent_y = sum_y / total_area cent_z = sum_z / total_area else OpenStudio.logFree(OpenStudio::Info, 'openstudiostandards.get_roof_centroid_coords', 'Did not find a roof on the top floor!') end return cent_x, cent_y, cent_z end
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Return x,y,z coordinates of space centroid
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 170 def get_space_centroid_coords(space) total_area = 0.0 sum_x = 0.0 sum_y = 0.0 sum_z = 0.0 space.surfaces.each do |surf| total_area += surf.grossArea.to_f sum_x += (surf.centroid.x.to_f + space.xOrigin.to_f) * surf.grossArea.to_f sum_y += (surf.centroid.y.to_f + space.yOrigin.to_f) * surf.grossArea.to_f sum_z += (surf.centroid.z.to_f + space.zOrigin.to_f) * surf.grossArea.to_f end space_centroid_x = sum_x / total_area space_centroid_y = sum_y / total_area space_centroid_z = sum_z / total_area return space_centroid_x, space_centroid_y, space_centroid_z end
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Return hash of flags for whether storey is conditioned and average ceiling z-coordinates of building storeys.
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 99 def get_storey_avg_clg_zcoords(model) storey_avg_clg_zcoords = {} model.getBuildingStorys.each do |storey| storey_avg_clg_zcoords[storey] = [] storey_cond = false total_area = 0.0 sum = 0.0 raise("get_storey_avg_clg_zcoords: storey #{storey.name} has no spaces associated with it. Either delete the storey or " \ "assign spaces to it") if storey.spaces.empty? storey.spaces.each do |space| # Determine if any of the spaces/zones of the storey are conditioned? If yes then the floor is considered to be conditioned if space.thermalZone.is_initialized zone = space.thermalZone.get if zone.thermostat.is_initialized if zone.thermostat.get.to_ThermostatSetpointDualSetpoint.is_initialized if zone.thermostat.get.to_ThermostatSetpointDualSetpoint.get.heatingSetpointTemperatureSchedule.is_initialized || zone.thermostat.get.to_ThermostatSetpointDualSetpoint.get.coolingSetpointTemperatureSchedule.is_initialized storey_cond = true end end end end # Find average height of z-coordinates of ceiling/roof of floor space.surfaces.each do |surf| if surf.surfaceType.to_s.upcase == 'ROOFCEILING' sum += (surf.centroid.z.to_f + space.zOrigin.to_f) * surf.grossArea.to_f total_area += surf.grossArea.to_f end end end storey_avg_clg_zcoords[storey] << storey_cond storey_avg_clg_zcoords[storey] << (sum / total_area) end return storey_avg_clg_zcoords end
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Get a map of bldg storeys and zones
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 435 def get_storey_zones_map(system_zones_map) storey_zones_map = {} system_zones_map.each do |sys,zones| zones.each do |zone| storey = get_zone_storey(zone) storey_zones_map[storey.name.to_s] = [] if !storey_zones_map.has_key? storey.name.to_s storey_zones_map[storey.name.to_s] << zone end end return storey_zones_map end
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Return hash of zone and cooling equipment type in the zone
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 84 def get_zone_clg_eqpt_type(model) zone_clg_eqpt_type = {} model.getThermalZones.each do |zone| zone.equipment.each do |eqpt| if eqpt.to_ZoneHVACPackagedTerminalAirConditioner.is_initialized zone_clg_eqpt_type[zone.name.to_s] = 'ZoneHVACPackagedTerminalAirConditioner' break end end end return zone_clg_eqpt_type end
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Get building storey for a zone
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 419 def get_zone_storey(zone) zone_storey = nil zone.model.getBuildingStorys.each do |storey| storey.spaces.each do |space| if space.thermalZone.get.name.to_s == zone.name.to_s zone_storey = storey break end end break if !zone_storey.nil? end return zone_storey end
Combine the data from the JSON files into a single hash Load JSON files differently depending on whether loading from the OpenStudio CLI embedded filesystem or from typical gem installation
# File lib/openstudio-standards/standards/necb/ECMS/ecms.rb, line 8 def load_standards_database_new @standards_data = {} @standards_data['tables'] = {} if __dir__[0] == ':' # Running from OpenStudio CLI embedded_files_relative('data/', /.*\.json/).each do |file| data = JSON.parse(EmbeddedScripting.getFileAsString(file)) if !data['tables'].nil? && data['tables'].first['data_type'] == 'table' @standards_data['tables'] << data['tables'].first else @standards_data[data.keys.first] = data[data.keys.first] end end else files = Dir.glob("#{File.dirname(__FILE__)}/data/*.json").select { |e| File.file? e } files.each do |file| data = JSON.parse(File.read(file)) if !data['tables'].nil? @standards_data['tables'] = [*@standards_data['tables'], *data['tables']].to_h else @standards_data[data.keys.first] = data[data.keys.first] end end end return @standards_data end
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Apply boiler efficiency This model takes an OS model and a boiler efficiency string or hash sent to it with the following form:
"boiler_eff": { "name" => "NECB 88% Efficient Condensing Boiler", "efficiency" => 0.88, "part_load_curve" => "BOILER-EFFPLR-COND-NECB2011", "notes" => "From NECB 2011." }
If boiler_eff is nill then it does nothing. If both “efficiency” and “part_load_curve” are nil then it does nothing. If a boiler_eff is passed as a string and not a hash then it looks for a “name” field in the boiler_set.json file that matches boiler_eff and gets the associated boiler performance details from the file. If an efficiency is set but is not between 0.01 and 1.0 it returns an error. Otherwise, it looks for plant loop supply components that match the “OS_BoilerHotWater” type. If it finds one it then calls the “reset_boiler_efficiency method which resets the the boiler efficiency and looks for the part load efficiency curve in the curves.json file. If it finds a curve it sets the part load curve to that, otherwise it returns an error. It also renames the boiler to include the ”boiler_eff“.
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 3118 def modify_boiler_efficiency(model:, boiler_eff: nil) return if boiler_eff.nil? # If boiler_eff is a string rather than a hash then assume it is the name of a boiler efficiency package and look # for a package with that name in boiler_set.json. if boiler_eff.is_a?(String) eff_packages = @standards_data['tables']['boiler_eff_ecm']['table'] eff_package = eff_packages.select { |eff_pack_info| eff_pack_info['name'] == boiler_eff } raise "Cannot not find #{boiler_eff} in the ECMS boiler_set.json file. Please check that the name is correctly spelled in the ECMS class boiler_set.json and in the code calling (directly or through another method) the ECMS class modify_boiler_efficiency method." if eff_package.empty? raise "More than one boiler efficiency package with the name #{boiler_eff} was found. Please check the ECMS class boiler_set.json file and make sure that each boiler efficiency package has a unique name." if eff_package.size > 1 ecm_name = boiler_eff boiler_eff = { 'name' => ecm_name, 'efficiency' => eff_package[0]['efficiency'], 'part_load_curve' => eff_package[0]['part_load_curve'] } end # If nothing is passed in the boiler_eff hash then assume this was not supposed to be used and return without doing # anything. return if boiler_eff['name'].nil? && boiler_eff['efficiency'].nil? && boiler_eff['part_load_curve'].nil? # If no efficiency or partload curve are found (either passed directly or via the boiler_set.json file) then assume # that the current SHW setting should not be changed. Return without changing anything. return if boiler_eff['efficiency'].nil? && boiler_eff['part_load_curve'].nil? raise 'You attempted to set the efficiency of boilers in this model to nil. Please check the ECMS class boiler_set.json and make sure the efficiency is properly set' if boiler_eff['efficiency'].nil? raise "You attempted to set the efficiency of boilers in this model to: #{boiler_eff['efficiency']}. Please check the ECMS class boiler_set.json and make sure the efficiency you set is between 0.01 and 1.0." if boiler_eff['efficiency'] < 0.01 || boiler_eff['efficiency'] > 1.0 raise 'You attempted to set the part load curve of boilers in this model to nil. Please check the ECMS class boiler_set.json file and ensure that both the efficiency and part load curve are set.' if boiler_eff['part_load_curve'].nil? model.getBoilerHotWaters.sort.each do |mod_boiler| if mod_boiler.fuelType.to_s.downcase == 'electricity' OpenStudio.logFree(OpenStudio::Warn, 'openstudio.standards.BoilerHotWater', "The boiler #{mod_boiler.name.to_s} is electrically powered. Only the efficiencies of fuel fired boilers are modified. The efficiency of this boiler will not be changed.") next end reset_boiler_efficiency(model: model, component: mod_boiler.to_BoilerHotWater.get, eff: boiler_eff) end end
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Apply advanced chiller measure
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 3539 def modify_chiller_efficiency(model:, chiller_type:) return if chiller_type.nil? || chiller_type == false || chiller_type == 'none' || chiller_type == 'NECB_Default' model.getChillerElectricEIRs.sort.each do |mod_chiller| ref_capacity_w = mod_chiller.referenceCapacity ref_capacity_w = ref_capacity_w.to_f ##### Look for a chiller set in chiller_set.json (with a capacity close to that of the existing chiller) chiller_set, chiller_min_cap, chiller_max_cap = find_chiller_set(chiller_type: chiller_type, ref_capacity_w: ref_capacity_w) ##### No need to replace any chillers with capacity = 0.001 W as per Kamel Haddad's comment if ref_capacity_w > 0.0011 reset_chiller_efficiency(model: model, component: mod_chiller.to_ChillerElectricEIR.get, cop: chiller_set) end end ##### Change fan power of single-speed Cooling towers from 'Hard Sized' to Autosized (Otherwise, E+ gives the fatal error 'Autosizing of cooling tower UA failed for tower') model.getCoolingTowerSingleSpeeds.sort.each(&:autosizeFanPoweratDesignAirFlowRate) end
¶ ↑
Apply Furnace efficiency This model takes an OS model and a furnace efficiency string or hash sent to it with the following form:
"furnace_eff": { "name" => "NECB 85% Efficient Condensing Furnace", "efficiency" => 0.85, "part_load_curve" => "FURNACE-EFFPLR-COND-NECB2011", "notes" => "From NECB 2011." }
If furnace_eff is nil then it does nothing. If both “efficiency” and “part_load_curve” are nil then it does nothing. If a furnace_eff is a string it looks for furnace_eff as a “name” in the furnace_set.json file to find the performance details. If an efficiency is set but is not between 0.01 and 1.0 it returns an error. Otherwise, it looks for air loop supply components that match the “OS_CoilHeatingGas” type. If it finds one it then calls the reset_furnace_efficiency
method which resets the the furnace efficiency and looks for the part load efficiency curve in the curves.json file. If it finds a curve it sets the part load curve to that, otherwise it returns an error. It also renames the furnace to include the “furnace_eff”.
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 3223 def modify_furnace_efficiency(model:, furnace_eff: nil) return if furnace_eff.nil? # If furnace_eff is a string rather than a hash then assume it is the name of a furnace efficiency package and look # for a package with that name in furnace_set.json. if furnace_eff.is_a?(String) eff_packages = @standards_data['tables']['furnace_eff_ecm']['table'] eff_package = eff_packages.select { |eff_pack_info| eff_pack_info['name'] == furnace_eff } raise "Cannot not find #{furnace_eff} in the ECMS furnace_set.json file. Please check that the name is correctly spelled in the ECMS class furnace_set.json and in the code calling (directly or through another method) the ECMS class modify_furnace_efficiency method." if eff_package.empty? raise "More than one furnace efficiency package with the name #{furnace_eff} was found. Please check the ECMS class furnace_set.json file and make sure that each furnace efficiency package has a unique name." if eff_package.size > 1 ecm_name = furnace_eff furnace_eff = { 'name' => ecm_name, 'efficiency' => eff_package[0]['efficiency'], 'part_load_curve' => eff_package[0]['part_load_curve'] } end # If nothing is passed in the furnace_eff hash then assume this was not supposed to be used and return without doing # anything. return if furnace_eff['name'].nil? && furnace_eff['efficiency'].nil? && furnace_eff['part_load_curve'].nil? # If no efficiency or partload curve are found (either passed directly or via the furnace_set.json file) then assume # that the current furance performance settings should not be changed. Return without changing anything. return if furnace_eff['efficiency'].nil? && furnace_eff['part_load_curve'].nil? raise 'You attempted to set the efficiency of furnaces in this model to nil. Please check the ECMS class furnace_set.json file and make sure the efficiency is set' if furnace_eff['efficiency'].nil? raise "You attempted to set the efficiency of furnaces in this model to: #{furnace_eff['efficiency']}. Please check the ECMS class furnace_set.json file and make sure the efficiency you set is between 0.01 and 1.0." if furnace_eff['efficiency'] < 0.01 || furnace_eff['efficiency'] > 1.0 raise 'You attempted to set the part load curve of furnaces in this model to nil. Please check the ECMS class furnace_set.json file and ensure that both the efficiency and part load curve are set.' if furnace_eff['part_load_curve'].nil? model.getCoilHeatingGass.sort.each do |mod_furnace| reset_furnace_efficiency(model: model, component: mod_furnace.to_CoilHeatingGas.get, eff: furnace_eff) end end
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Apply shw efficiency This model takes an OS model and a shw efficiency string or hash sent to it with the following form:
"shw_eff": { "name" => "Natural Gas Power Vent with Electric Ignition", "efficiency" => 0.94, "part_load_curve" => "SWH-EFFFPLR-NECB2011" "notes" => "From NECB 2011." }
If shw_eff is nil then it does nothing. If both “efficiency” and “part_load_curve” are nil then it does nothing. If shw_eff is a string then it looks for shw_eff as a “name” in the shw_set.json file for the details on the tank. If an efficiency is set but is not between 0.01 and 1.0 it returns an error. Otherwise, it looks for mixed water heaters. If it finds any it then calls the reset_shw_efficiency
method which resets the the shw efficiency and the part load curve. It also renames the shw tank with the following pattern:
{volume}Gal {eff_name} Water Heater - {Capacity}kBtu/hr {efficiency} Therm Eff
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 3303 def modify_shw_efficiency(model:, shw_eff: nil) return if shw_eff.nil? # If shw_eff is a string rather than a hash then assume it is the name of a shw efficiency package and look # for a package with that name in shw_set.json. if shw_eff.is_a?(String) eff_packages = @standards_data['tables']['shw_eff_ecm']['table'] eff_package = eff_packages.select { |eff_pack_info| eff_pack_info['name'] == shw_eff } raise "Cannot not find #{shw_eff} in the ECMS shw_set.json file. Please check that the name is correctly spelled in the ECMS class shw_set.json and in the code calling (directly or through another method) the ECMS class modify_shw_efficiency method." if eff_package.empty? raise "More than one shw tank efficiency package with the name #{shw_eff} was found. Please check the ECMS class shw_set.json file and make sure that each shw tank efficiency package has a unique name." if eff_package.size > 1 ecm_name = shw_eff shw_eff = { 'name' => ecm_name, 'efficiency' => eff_package[0]['efficiency'], 'part_load_curve' => eff_package[0]['part_load_curve'] } end # If nothing is passed in the shw_eff hash then assume this was not supposed to be used and return without doing # anything. return if shw_eff['name'].nil? && shw_eff['efficiency'].nil? && shw_eff['part_load_curve'].nil? # If no efficiency or partload curve are found (either passed directly or via the shw_set.json file) then assume # that the current shw performance settings should not be changed. Return without changing anything. return if shw_eff['efficiency'].nil? && shw_eff['part_load_curve'].nil? raise 'You attempted to set the efficiency of shw tanks in this model to nil. Please check the ECMS class shw_set.json file and make sure the efficiency is set' if shw_eff['efficiency'].nil? raise "You attempted to set the efficiency of shw tanks in this model to: #{shw_eff['efficiency']}. Please check the ECMS class shw_set.json and make sure the efficiency you set is between 0.01 and 1.0." if shw_eff['efficiency'] < 0.01 || shw_eff['efficiency'] > 1.0 raise 'You attempted to set the part load curve of shw tanks in this model to nil. Please check the ECMS class shw_set.json file and ensure that both the efficiency and part load curve are set.' if shw_eff['part_load_curve'].nil? model.getWaterHeaterMixeds.sort.each do |shw_mod| reset_shw_efficiency(model: model, component: shw_mod, eff: shw_eff) end end
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Method to update the cop and/or the performance curves of unitary dx coils. The method input ‘unitary_cop’ can either be a string or a hash. When it’s a string it’s used to find a hash in the json table ‘unitary_cop_ecm’. When it’s a hash it holds the parameters needed to update the cop and/or the performance curves of the unitary coil.
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 3389 def modify_unitary_cop(model:, unitary_cop:, sizing_done:, sql_db_vars_map:) return if unitary_cop.nil? || (unitary_cop.to_s == 'NECB_Default') coils = model.getCoilCoolingDXSingleSpeeds.select {|coil| coil.name.to_s.include? '_dx'} coils += model.getCoilCoolingDXMultiSpeeds.select {|coil| coil.name.to_s.include? '_dx'} unitary_cop_copy = unitary_cop.dup coils.sort.each do |coil| coil_type = 'SingleSpeed' coil_type = 'MultiSpeed' if coil.class.name.to_s.include? 'CoilCoolingDXMultiSpeed' # if the parameter 'unitary_cop' is a string then get the information on the new parameters for the coils from # the json table 'unitary_cop_ecm' if unitary_cop_copy.is_a?(String) search_criteria = {} search_criteria['name'] = unitary_cop_copy coil_name = coil.name.to_s if (sql_db_vars_map.has_key? coil_name) && !sizing_done then coil.setName(sql_db_vars_map[coil_name]) end if coil_type == 'SingleSpeed' capacity_w = coil_cooling_dx_single_speed_find_capacity(coil) elsif coil_type == 'MultiSpeed' capacity_w = coil_cooling_dx_multi_speed_find_capacity(coil) end coil.setName(coil_name) cop_package = model_find_object(@standards_data['tables']['unitary_cop_ecm'], search_criteria, capacity_w) raise "Cannot find #{unitary_cop_ecm} in the ECMS unitary_acs.json file. Please check that the name is correctly spelled in the ECMS class unitary_acs.json file and in the code calling (directly or through another method) the ECMS class modify_unitary_eff method." if cop_package.empty? ecm_name = unitary_cop_copy unitary_cop = { 'name' => ecm_name, 'maximum_capacity' => cop_package['maximum_capacity'], 'minimum_energy_efficiency_ratio' => cop_package['minimum_energy_efficiency_ratio'], 'minimum_seasonal_energy_efficiency_ratio' => cop_package['minimum_seasonal_energy_efficiency_ratio'], 'minimum_coefficient_of_performance_cooling' => cop_package['minimum_coefficient_of_performance_cooling'], 'ref_flow_rate_m3_per_sec' => cop_package['ref_flow_rate_m3_per_sec'], 'cool_cap_ft' => cop_package['cool_cap_ft'], 'cool_cap_fflow' => cop_package['cool_cap_fflow'], 'cool_eir_ft' => cop_package['cool_eir_ft'], 'cool_eir_fflow' => cop_package['cool_eir_fflow'], 'cool_plf_fplr' => cop_package['cool_plf_fplr'] } end next if unitary_cop['minimum_energy_efficiency_ratio'].nil? && unitary_cop['minimum_seasonal_energy_efficiency_ratio'].nil? && unitary_cop['minimum_coefficient_of_performance_cooling'].nil? && unitary_cop['cool_cap_ft'].nil? && unitary_cop['cool_cap_fflow'].nil? && unitary_cop['cool_eir_ft'].nil? && unitary_cop['cool_eir_fflow'].nil? && unitary_cop['cool_plf_fplr'].nil? && unitary_cop['ref_flow_rate_m3_per_sec'].nil? # If the dx coil is on an air loop then update its cop and the performance curves when these are specified in the ecm data if (coil_type == 'SingleSpeed' && coil.airLoopHVAC.is_initialized && (!coil.name.to_s.include? "_ASHP")) || (coil_type == 'MultiSpeed' && coil.containingHVACComponent.get.airLoopHVAC.is_initialized) # Set COP if sizing run is done if sizing_done cop = nil if unitary_cop['minimum_energy_efficiency_ratio'] cop = eer_to_cop_no_fan(unitary_cop['minimum_energy_efficiency_ratio'].to_f) elsif unitary_cop['minimum_seasonal_energy_efficiency_ratio'] cop = seer_to_cop_no_fan(unitary_cop['minimum_seasonal_energy_efficiency_ratio'].to_f) elsif unitary_cop['minimum_coefficient_of_performance_cooling'] cop = unitary_cop['minimum_coefficient_of_performance_cooling'].to_f end if coil_type == 'SingleSpeed' coil.setRatedCOP(cop) if cop elsif coil_type == 'MultiSpeed' coil.stages.sort.each do |stage| stage.setGrossRatedCoolingCOP(cop) if cop end end coil.setName('CoilCoolingDXSingleSpeed_dx-adv') if coil_type == 'SingleSpeed' coil.setName('CoilCoolingDXMultiSpeed_dx-adv') if coil_type == 'MultiSpeed' else # Set performance curves before sizing run cool_cap_ft = nil cool_cap_ft = @standards_data['curves'].select { |curve| curve['name'] == unitary_cop['cool_cap_ft'] }[0] if unitary_cop['cool_cap_ft'] cool_cap_ft = model_add_curve(model, unitary_cop['cool_cap_ft']) if cool_cap_ft cool_cap_fflow = nil cool_cap_fflow = @standards_data['curves'].select { |curve| curve['name'] == unitary_cop['cool_cap_fflow'] }[0] if unitary_cop['cool_cap_fflow'] cool_cap_fflow = model_add_curve(model, unitary_cop['cool_cap_fflow']) if cool_cap_fflow cool_eir_ft = nil cool_eir_ft = @standards_data['curves'].select { |curve| curve['name'] == unitary_cop['cool_eir_ft'] }[0] if unitary_cop['cool_eir_ft'] cool_eir_ft = model_add_curve(model, unitary_cop['cool_eir_ft']) if cool_eir_ft cool_eir_fflow = nil cool_eir_fflow = @standards_data['curves'].select { |curve| curve['name'] == unitary_cop['cool_eir_fflow'] }[0] if unitary_cop['cool_eir_fflow'] cool_eir_fflow = model_add_curve(model, unitary_cop['cool_eir_fflow']) if cool_eir_fflow cool_plf_fplr = nil cool_plf_fplr = @standards_data['curves'].select { |curve| curve['name'] == unitary_cop['cool_plf_fplr'] }[0] if unitary_cop['cool_plf_fplr'] cool_plf_fplr = model_add_curve(model, unitary_cop['cool_plf_fplr']) if cool_plf_fplr rated_flow_rate = nil rated_flow_rate = unitary_cop['ref_flow_rate_m3_per_sec'] * (capacity_w / unitary_cop['maximum_capacity']) if unitary_cop['ref_flow_rate_m3_per_sec'] if coil_type == 'SingleSpeed' coil.setTotalCoolingCapacityFunctionOfTemperatureCurve(cool_cap_ft) if cool_cap_ft coil.setTotalCoolingCapacityFunctionOfFlowFractionCurve(cool_cap_fflow) if cool_cap_fflow coil.setEnergyInputRatioFunctionOfTemperatureCurve(cool_eir_ft) if cool_eir_ft coil.setEnergyInputRatioFunctionOfFlowFractionCurve(cool_eir_fflow) if cool_eir_fflow coil.setPartLoadFractionCorrelationCurve(cool_plf_fplr) if cool_plf_fplr coil.setRatedAirFlowRate(rated_flow_rate) if rated_flow_rate elsif coil_type == 'MultiSpeed' coil.stages.sort.each do |stage| stage.setTotalCoolingCapacityFunctionofTemperatureCurve(cool_cap_ft) if cool_cap_ft stage.setTotalCoolingCapacityFunctionofFlowFractionCurve(cool_cap_fflow) if cool_cap_fflow stage.setEnergyInputRatioFunctionofTemperatureCurve(cool_eir_ft) if cool_eir_ft stage.setEnergyInputRatioFunctionofFlowFractionCurve(cool_eir_fflow) if cool_eir_fflow stage.setPartLoadFractionCorrelationCurve(cool_plf_fplr) if cool_plf_fplr end end end end end end
¶ ↑
Remove chilled-water plant loops
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 31 def remove_chw_loops(model) model.getPlantLoops.each do |iloop| chw_loop = false iloop.supplyComponents.each do |icomp| if icomp.to_ChillerElectricEIR.is_initialized chw_loop = true break end end if chw_loop then iloop.remove end end end
¶ ↑
Remove condenser-water plant loops
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 46 def remove_cw_loops(model) model.getPlantLoops.each do |iloop| cw_loop = false iloop.supplyComponents.each do |icomp| if icomp.to_CoolingTowerSingleSpeed.is_initialized cw_loop = true end end if cw_loop then iloop.remove end end end
¶ ↑
Remove hot-water plant loops
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 16 def remove_hw_loops(model) model.getPlantLoops.each do |iloop| hw_loop = false iloop.supplyComponents.each do |icomp| if icomp.to_BoilerHotWater.is_initialized hw_loop = true break end end if hw_loop then iloop.remove end end end
This method takes an OS model, a “OS_BoilerHotWater” type compenent, condensing efficiency limit and an efficiency hash which looks like:
"eff": { "name": "NECB 88% Efficient Condensing Boiler", "efficiency" => 0.88, "part_load_curve" => "BOILER-EFFPLR-COND-NECB2011", "notes" => "From NECB 2011." }
This method sets efficiency of the boiler to whatever is entered in eff. It then looks for the “part_load_curve” value in the curves.json file. If it does not find one it returns an error. If it finds one it reset the part load curve to whatever was found. It then determines the nominal capacity of the boiler. If the nominal capacity is greater than 1W the boiler is considered a primary boiler (for the name only) if the capacity is less than 1W the boiler is considered a secondary boiler (for the name only). It then renames the boiler according to the following pattern: “Primary/Secondary eff capacity kBtu/hr”.
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 3171 def reset_boiler_efficiency(model:, component:, eff:) component.setNominalThermalEfficiency(eff['efficiency']) part_load_curve_name = eff['part_load_curve'].to_s existing_curve = @standards_data['curves'].select { |curve| curve['name'] == part_load_curve_name } raise "No boiler with the name #{part_load_curve_name} could be found in the ECMS class curves.json file. Please check both the ECMS class boiler_set.json and class curves.json files to ensure the curve is entered and referenced correctly." if existing_curve.empty? part_load_curve_data = (@standards_data['curves'].select { |curve| curve['name'] == part_load_curve_name })[0] if part_load_curve_data['independent_variable_1'].to_s.upcase == 'TEnteringBoiler'.upcase || part_load_curve_data['independent_variable_2'].to_s.upcase == 'TEnteringBoiler'.upcase component.setEfficiencyCurveTemperatureEvaluationVariable('EnteringBoiler') elsif part_load_curve_data['independent_variable_1'].to_s.upcase == 'TLeavingBoiler'.upcase || part_load_curve_data['independent_variable_2'].to_s.upcase == 'TLeavingBoiler'.upcase component.setEfficiencyCurveTemperatureEvaluationVariable('LeavingBoiler') end part_load_curve = model_add_curve(model, part_load_curve_name) raise "There was a problem setting the boiler part load curve named #{part_load_curve_name} for #{component.name}. Please ensure that the curve is entered and referenced correctly in the ECMS class curves.json and boiler_set.json files." unless part_load_curve component.setNormalizedBoilerEfficiencyCurve(part_load_curve) if component.nominalCapacity.is_initialized boiler_size_w = component.nominalCapacity.to_f elsif component.isNominalCapacityAutosized boiler_size_w = component.autosizedNominalCapacity.get end boiler_size_kbtu_per_hour = OpenStudio.convert(boiler_size_w, 'W', 'kBtu/h').get boiler_primacy = 'Primary ' if boiler_size_w < 1.0 || component.name.to_s.upcase.include?("SECONDARY") boiler_primacy = 'Secondary ' end if eff['name'].nil? eff_measure_name = 'Revised Performance Boiler' else eff_measure_name = eff['name'] end old_boiler_name = component.name.to_s new_boiler_name = (boiler_primacy + eff_measure_name + " #{boiler_size_kbtu_per_hour.round(0)}kBtu/hr #{component.nominalThermalEfficiency} Thermal Eff").strip component.setName(new_boiler_name) end
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# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 3597 def reset_chiller_efficiency(model:, component:, cop:) # Note that all parameters (except for the capacity) of an existing chiller are replaced with the ones of the VSD chiller, as per Kamel Haddad's comment. component.setName('ChillerElectricEIR_VSDCentrifugalWaterChiller') component.setReferenceCOP(cop['cop_w_by_w']) component.setReferenceLeavingChilledWaterTemperature(cop['ref_leaving_chilled_water_temp_c']) component.setReferenceEnteringCondenserFluidTemperature(cop['ref_entering_condenser_fluid_temp_c']) component.isReferenceChilledWaterFlowRateAutosized component.isReferenceCondenserFluidFlowRateAutosized component.setMinimumPartLoadRatio(cop['min_part_load_ratio']) component.setMaximumPartLoadRatio(cop['max_part_load_ratio']) component.setOptimumPartLoadRatio(cop['opt_part_load_ratio']) component.setMinimumUnloadingRatio(cop['min_unloading_ratio']) component.setCondenserType(cop['condenser_type']) component.setFractionofCompressorElectricConsumptionRejectedbyCondenser(cop['fraction_of_compressor_electric_consumption_rejected_by_condenser']) component.setLeavingChilledWaterLowerTemperatureLimit(cop['leaving_chilled_water_lower_temperature_limit_c']) component.setChillerFlowMode(cop['chiller_flow_mode']) component.setDesignHeatRecoveryWaterFlowRate(cop['design_heat_recovery_water_flow_rate_m3_s']) # set other fields of this object to nothing #Note that this could not be done for the 'Condenser Heat Recovery Relative Capacity Fraction' field as there is no 'reset' for this field. component.resetCondenserFanPowerRatio component.resetSizingFactor component.resetBasinHeaterCapacity component.resetBasinHeaterSetpointTemperature component.resetBasinHeaterSchedule component.resetHeatRecoveryInletHighTemperatureLimitSchedule component.resetHeatRecoveryLeavingTemperatureSetpointNode ##### Replace cooling_capacity_function_of_temperature (CAPFT) curve capft_curve_name = cop['capft_curve'].to_s existing_curve = @standards_data['curves'].select { |curve| curve['name'] == capft_curve_name } raise "No chiller with the name #{capft_curve_name} could be found in the ECMS class curves.json file. Please check both the ECMS class chiller_set.json and curves.json files to ensure the curve is entered and referenced correctly." if existing_curve.empty? capft_curve_data = (@standards_data['curves'].select { |curve| curve['name'] == capft_curve_name })[0] capft_curve = model_add_curve(model, capft_curve_name) component.setCoolingCapacityFunctionOfTemperature(capft_curve) if capft_curve raise "There was a problem setting the CoolingCapacityFunctionOfTemperature curve named #{capft_curve_name} for #{component.name}. Please ensure that the curve is entered and referenced correctly in the ECMS class curves.json and chiller_set.json files." if !capft_curve ##### Replace electric_input_to_cooling_output_ratio_function_of_temperature (EIRFT) curve eirft_curve_name = cop['eirft_curve'].to_s existing_curve = @standards_data['curves'].select { |curve| curve['name'] == eirft_curve_name } raise "No chiller with the name #{eirft_curve_name} could be found in the ECMS class curves.json file. Please check both the ECMS class chiller_set.json and curves.json files to ensure the curve is entered and referenced correctly." if existing_curve.empty? eirft_curve_data = (@standards_data['curves'].select { |curve| curve['name'] == eirft_curve_name })[0] eirft_curve = model_add_curve(model, eirft_curve_name) component.setElectricInputToCoolingOutputRatioFunctionOfTemperature(eirft_curve) if eirft_curve raise "There was a problem setting the ElectricInputToCoolingOutputRatioFunctionOfTemperature curve named #{eirft_curve_name} for #{component.name}. Please ensure that the curve is entered and referenced correctly in the ECMS class curves.json and chiller_set.json files." if !eirft_curve ##### Replace electric_input_to_cooling_output_ratio_function_of_part_load_ratio (EIRFPLR) curve eirfplr_curve_name = cop['eirfplr_curve'].to_s existing_curve = @standards_data['curves'].select { |curve| curve['name'] == eirfplr_curve_name } raise "No chiller with the name #{eirfplr_curve_name} could be found in the ECMS class curves.json file. Please check both the ECMS class chiller_set.json and curves.json files to ensure the curve is entered and referenced correctly." if existing_curve.empty? eirfplr_curve_data = (@standards_data['curves'].select { |curve| curve['name'] == eirfplr_curve_name })[0] eirfplr_curve = model_add_curve(model, eirfplr_curve_name) component.setElectricInputToCoolingOutputRatioFunctionOfPLR(eirfplr_curve) if eirfplr_curve raise "There was a problem setting the ElectricInputToCoolingOutputRatioFunctionOfPLR curve named #{eirfplr_curve_name} for #{component.name}. Please ensure that the curve is entered and referenced correctly in the ECMS class curves.json and chiller_set.json files." if !eirfplr_curve end
This method takes an OS model, a “OS_CoilHeatingGas” type compenent, and an efficiency hash which looks like:
"eff": { "name": "NECB 85% Efficient Condensing Furnace", "efficiency" => 0.85, "part_load_curve" => "FURNACE-EFFPLR-COND-NECB2011", "notes" => "From NECB 2011." }
This method sets the efficiency of the furnace to whatever is entered in eff. It then looks for the “part_load_curve” value in the curves.json file. If it does not find one it returns an error. If it finds one it reset the part load curve to whatever was found. It then renames the furnace according to the following pattern: “eff + <furnace number (whatever was there before)>”.
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 3268 def reset_furnace_efficiency(model:, component:, eff:) component.setGasBurnerEfficiency(eff['efficiency']) part_load_curve_name = eff['part_load_curve'].to_s existing_curve = @standards_data['curves'].select { |curve| curve['name'] == part_load_curve_name } raise "No furnace part load curve with the name #{part_load_curve_name} could be found in the ECMS class curves.json file. Please check both the ECMS class curves.json and the measure furnace_set.json files to ensure the curve is entered and referenced correctly." if existing_curve.empty? part_load_curve = model_add_curve(model, part_load_curve_name) raise "There was a problem setting the furnace part load curve named #{part_load_curve_name} for #{component.name}. Please ensure that the curve is entered and referenced correctly in the ECMS class curves.json or measure furnace_set.json files." unless part_load_curve component.setPartLoadFractionCorrelationCurve(part_load_curve) if eff['name'].nil? ecm_package_name = 'Revised Performance Furnace' else ecm_package_name = eff['name'] end furnace_num = component.name.to_s.gsub(/[^0-9]/, '') new_furnace_name = (ecm_package_name + " #{furnace_num}").strip component.setName(new_furnace_name) end
This method takes an OS model, a “OS_WaterHeaterMixed” type compenent, and an efficiency hash which looks like:
"eff": { "name": "Natural Gas Power Vent with Electric Ignition", "efficiency" => 0.94, "part_load_curve" => "SWH-EFFFPLR-NECB2011", "notes" => "From NECB 2011." }
This method sets the efficiency of the shw heater to whatever is entered in eff. It then looks for the “part_load_curve” value in the curves.json file. If it does not find one it returns an error. If it finds one it resets the part load curve to whatever was found. It then renames the shw tank according to the following pattern:
{volume}Gal {eff_name} Water Heater - {Capacity}kBtu/hr {efficiency} Therm Eff
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 3348 def reset_shw_efficiency(model:, component:, eff:) return if component.heaterFuelType.to_s.upcase == 'ELECTRICITY' eff_result = component.setHeaterThermalEfficiency(eff['efficiency'].to_f) raise "There was a problem setting the efficiency of the SHW #{component.name}. Please check the ECMS class shw_set.json file or the model." unless eff_result part_load_curve_name = eff['part_load_curve'].to_s existing_curve = @standards_data['curves'].select { |curve| curve['name'] == part_load_curve_name } raise "No shw tank part load curve with the name #{part_load_curve_name} could be found in the ECMS class curves.json file. Please check both the ECMS class curves.json and the measure shw_set.json files to ensure the curve is entered and referenced correctly." if existing_curve.empty? part_load_curve = model_add_curve(model, part_load_curve_name) raise "There was a problem setting the shw tank part load curve named #{part_load_curve_name} for #{component.name}. Please ensure that the curve is entered and referenced correctly in the ECMS class curves.json and shw_set.json files." unless part_load_curve component.setPartLoadFactorCurve(part_load_curve) # Get the volume and capacity of the SHW tank. if component.tankVolume.is_initialized shw_vol_m3 = component.tankVolume.to_f shw_vol_gal = OpenStudio.convert(shw_vol_m3, 'm^3', 'gal').get.to_f.round(0) elsif component.isTankVolumeAutosized shw_vol_gal = 'auto_size' end if component.heaterMaximumCapacity.is_initialized shw_capacity_W = component.heaterMaximumCapacity.to_f shw_capacity_kBtu_hr = OpenStudio.convert(shw_capacity_W, 'W', 'kBtu/h').get.to_f.round(0) elsif component.isHeaterMaximumCapacityAutosized shw_capacity_kBtu_hr = 'auto_cap' end # Set a default revised shw tank name if no name is present in the eff hash. if eff['name'].nil? shw_ecm_package_name = 'Revised' else shw_ecm_package_name = eff['name'] end shw_name = ("#{shw_vol_gal} Gal #{shw_ecm_package_name} Water Heater - #{shw_capacity_kBtu_hr}kBtu/hr #{eff['efficiency']} Therm Eff").strip component.setName(shw_name) end
Electrical
# File lib/openstudio-standards/standards/necb/ECMS/loads.rb, line 25 def scale_electrical_loads(model:, scale: 'NECB_Default') ##### Remove leading or trailing whitespace in case users add them in inputs if scale.instance_of?(String) scale = scale.strip end return model if (scale == 'NECB_Default') || scale.nil? ##### Convert a string to a float if scale.instance_of?(String) scale = scale.to_f end if scale == 0.0 model.getElectricEquipments.sort.each(&:remove) model.getElectricEquipmentDefinitions.sort.each(&:remove) else model.getElectricEquipments.sort.each do |item| item.setMultiplier(item.multiplier * scale) end end end
Infiltration
# File lib/openstudio-standards/standards/necb/ECMS/loads.rb, line 71 def scale_infiltration_loads(model:, scale: 'NECB_Default') ##### Remove leading or trailing whitespace in case users add them in inputs if scale.instance_of?(String) scale = scale.strip end return model if (scale == 'NECB_Default') || scale.nil? ##### Convert a string to a float if scale.instance_of?(String) scale = scale.to_f end if scale == 0.0 model.getSpaceInfiltrationDesignFlowRates.sort.each(&:remove) else model.getSpaceInfiltrationDesignFlowRates.sort.each do |infiltration_load| infiltration_load.setDesignFlowRate(infiltration_load.designFlowRate.get * scale) unless infiltration_load.designFlowRate.empty? infiltration_load.setFlowperSpaceFloorArea(infiltration_load.flowperSpaceFloorArea.get * scale) unless infiltration_load.flowperSpaceFloorArea.empty? infiltration_load.setFlowperExteriorSurfaceArea(infiltration_load.flowperExteriorSurfaceArea.get * scale) unless infiltration_load.flowperExteriorSurfaceArea.empty? infiltration_load.setAirChangesperHour(infiltration_load.airChangesperHour.get * scale) unless infiltration_load.airChangesperHour.empty? end end end
Outdoor Air
# File lib/openstudio-standards/standards/necb/ECMS/loads.rb, line 47 def scale_oa_loads(model:, scale: 'NECB_Default') ##### Remove leading or trailing whitespace in case users add them in inputs if scale.instance_of?(String) scale = scale.strip end return model if (scale == 'NECB_Default') || scale.nil? ##### Convert a string to a float if scale.instance_of?(String) scale = scale.to_f end if scale == 0.0 model.getDesignSpecificationOutdoorAirs.sort.each(&:remove) else model.getDesignSpecificationOutdoorAirs.sort.each do |oa_def| oa_def.setOutdoorAirFlowperPerson(oa_def.outdoorAirFlowperPerson * scale) unless oa_def.isOutdoorAirFlowperPersonDefaulted oa_def.setOutdoorAirFlowperFloorArea(oa_def.outdoorAirFlowperFloorArea * scale) unless oa_def.isOutdoorAirFlowperFloorAreaDefaulted oa_def.setOutdoorAirFlowRate(oa_def.outdoorAirFlowRate * scale) unless oa_def.isOutdoorAirFlowRateDefaulted oa_def.setOutdoorAirFlowAirChangesperHour(oa_def.outdoorAirFlowAirChangesperHour * scale) unless oa_def.isOutdoorAirFlowAirChangesperHourDefaulted end end end
Occupancy
# File lib/openstudio-standards/standards/necb/ECMS/loads.rb, line 3 def scale_occupancy_loads(model:, scale: 'NECB_Default') ##### Remove leading or trailing whitespace in case users add them in inputs if scale.instance_of?(String) scale = scale.strip end return model if (scale == 'NECB_Default') || scale.nil? ##### Convert a string to a float if scale.instance_of?(String) scale = scale.to_f end if scale == 0.0 model.getPeoples.sort.each(&:remove) model.getPeopleDefinitions.sort.each(&:remove) else model.getPeoples.sort.each do |item| item.setMultiplier(item.multiplier * scale) end end end
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# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 1951 def set_ghx_loop_district_cap(model) # The autosized values for the district heating and cooling objects on a condenser loop are the sum of the peak heating and # cooling loads. Here the capacity of the district heating object of the condenser loop is set to the maximum district heating # rate on the winter design day. Similarily the capacity of the district cooling object of the condenser loop is set to the # maximum district cooling rate on the summer design day. cw_loops = model.getPlantLoops.select{|loop| loop.sizingPlant.loopType.to_s.downcase == 'condenser'} ghx_loops = cw_loops.select { |loop| loop.name.to_s.downcase.include? 'glhx' } return if ghx_loops.empty? ghx_loop = ghx_loops[0] dist_htg_eqpts = ghx_loop.supplyComponents.select { |comp| comp.iddObjectType.valueName.to_s.include?('DistrictHeating') } if !dist_htg_eqpts.empty? case dist_htg_eqpts[0].iddObjectType.valueName.to_s when 'OS_DistrictHeating' dist_htg_eqpt = dist_htg_eqpts[0].to_DistrictHeating.get when 'OS_DistrictHeating_Water' dist_htg_eqpt = dist_htg_eqpts[0].to_DistrictHeatingWater.get when 'OS_DistrictHeating_Steam' dist_htg_eqpt = dist_htg_eqpts[0].to_DistrictHeatingSteam.get end end dist_clg_eqpts = ghx_loop.supplyComponents.select {|comp| comp.to_DistrictCooling.is_initialized} dist_clg_eqpt = dist_clg_eqpts[0].to_DistrictCooling.get if !dist_clg_eqpts.empty? raise("set_cond_loop_district_cap: condenser loop doesn't have a district heating and district cooling objects") if dist_htg_eqpts.empty? || dist_clg_eqpts.empty? # District Heating sql_command = "SELECT ReportVariableDataDictionaryIndex FROM ReportVariableDataDictionary WHERE VariableName='District Heating Water Rate'" dhtg_index = model.sqlFile.get.execAndReturnFirstString(sql_command).get raise("set_ghx_loop_district_cap: EnergyPlus sql results file has no data for district heating hot water rate") if dhtg_index.nil? sql_command = "SELECT Value FROM ReportVariableWithTime WHERE ReportDataDictionaryIndex=#{dhtg_index} AND DayType='WinterDesignDay'" dist_htg_w = model.sqlFile.get.execAndReturnVectorOfString(sql_command).get sql_command = "SELECT Value FROM ReportVariableWithTime WHERE ReportDataDictionaryIndex=#{dhtg_index} AND DayType='SummerDesignDay'" dist_htg_s = model.sqlFile.get.execAndReturnVectorOfString(sql_command).get # District Cooling sql_command = "SELECT ReportVariableDataDictionaryIndex FROM ReportVariableDataDictionary WHERE VariableName='District Cooling Water Rate'" dclg_index = model.sqlFile.get.execAndReturnFirstString(sql_command).get raise("set_ghx_loop_district_cap: EnergyPlus sql results file has no data for district cooling chilled water rate") if dclg_index.nil? sql_command = "SELECT Value FROM ReportVariableWithTime WHERE ReportDataDictionaryIndex=#{dclg_index} AND DayType='SummerDesignDay'" dist_clg_s = model.sqlFile.get.execAndReturnVectorOfString(sql_command).get sql_command = "SELECT Value FROM ReportVariableWithTime WHERE ReportDataDictionaryIndex=#{dclg_index} AND DayType='WinterDesignDay'" dist_clg_w = model.sqlFile.get.execAndReturnVectorOfString(sql_command).get # Assign peak heating and cooling loads to capacities of district objects max_htg_load = 0.0 max_clg_load = 0.0 for hour in 1..24 htg_load = [dist_htg_w[hour-1].to_f-dist_clg_w[hour-1].to_f,0.0].max clg_load = [dist_clg_s[hour-1].to_f-dist_htg_s[hour-1].to_f,0.0].max max_htg_load = [max_htg_load,htg_load].max max_clg_load = [max_clg_load,clg_load].max end dist_htg_eqpt.setNominalCapacity(max_htg_load) dist_clg_eqpt.setNominalCapacity(max_clg_load) end
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Update the map between systems and zones
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 449 def update_system_zones_map(model,system_zones_map,system_zones_map_option,system_key) updated_system_zones_map = {} if system_zones_map_option == 'one_sys_per_bldg' system_zones_map.each do |sname,zones| updated_system_zones_map[system_key] = [] if !updated_system_zones_map.has_key? system_key updated_system_zones_map[system_key] += zones end elsif system_zones_map_option == 'one_sys_per_floor' storey_zones_map = get_storey_zones_map(system_zones_map) storey_zones_map.each do |storey_name,zones| sys_name = "#{system_key}_#{storey_name.gsub(' ','_')}" updated_system_zones_map[sys_name] = [] if !updated_system_zones_map.has_key? sys_name updated_system_zones_map[sys_name] += zones end end return updated_system_zones_map end
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The first 5 letters of the air loop name designate the system type (sys_abbr). This method updates the system type designation in the air loop name. At the same time the chosen air loop names are checked to avoid duplicate names from being used in the hash for system to zones.
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 472 def update_system_zones_map_keys(system_zones_map,sys_abbr) updated_system_zones_map = {} system_zones_map.each do |sname,zones| updated_sys_name = "#{sys_abbr}#{sname[5..-1]}" if !updated_system_zones_map.has_key? updated_sys_name updated_system_zones_map[updated_sys_name] = zones else updated_sys_name_set = false index = 1 while !updated_sys_name_set updated_sys_name = "#{sys_abbr}#{sname[5..-1]}" updated_sys_name.chop! if updated_sys_name.split.size > 1 updated_sys_name = updated_sys_name + index.to_s if !updated_system_zones_map.has_key? updated_sys_name updated_sys_name_set = true updated_system_zones_map[updated_sys_name] = zones end index += 1 end end end return updated_system_zones_map end
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Method to determine whether zone can have terminal vrf equipment. Zones with no vrf terminal equipment are characterized by transient occupancy such is the case for corridors, stairwells, storage, …
# File lib/openstudio-standards/standards/necb/ECMS/hvac_systems.rb, line 314 def zone_with_no_vrf_eqpt?(zone) space_types_to_skip = {} space_types_to_skip['NECB2011'] = ['Atrium - H < 13m', 'Atrium - H > 13m', 'Audience - auditorium', 'Corr. < 2.4m wide', 'Corr. >= 2.4m wide', 'Electrical/Mechanical', 'Hospital corr. < 2.4m', 'Hospital corr. >= 2.4m', 'Mfg - corr. < 2.4m', 'Mfg - corr. >= 2.4m', 'Lobby - elevator', 'Lobby - hotel', 'Lobby - motion picture', 'Lobby - other', 'Lobby - performance arts', 'Locker room', 'Parking garage space', 'Stairway', 'Storage area', 'Storage area - occsens', 'Storage area - refrigerated', 'Storage area - refrigerated - occsens', 'Washroom', 'Warehouse - fine', 'Warehouse - fine - refrigerated', 'Warehouse - med/blk', 'Warehouse - med/blk - refrigerated', 'Warehouse - med/blk2', 'Warehouse - med/blk2 - refrigerated', 'Hotel/Motel - lobby'] space_types_to_skip['NECB2015'] = ['Atrium (height < 6m)', 'Atrium (6 =< height <= 12m)', 'Atrium (height > 12m)', 'Computer/Server room-sch-A', 'Copy/Print room', 'Corridor/Transition area - hospital', 'Corridor/Transition area - manufacturing facility', 'Corridor/Transition area - space designed to ANSI/IES RP-28', 'Corridor/Transition area other', 'Electrical/Mechanical room', 'Emergency vehicle garage', 'Lobby - elevator', 'Lobby - hotel', 'Lobby - motion picture theatre', 'Lobby - performing arts theatre', 'Lobby - space designed to ANSI/IES RP-28', 'Lobby - other', 'Locker room', 'Storage garage interior', 'Storage room < 5 m2', 'Storage room <= 5 m2 <= 100 m2', 'Storage room > 100 m2', 'Washroom - space designed to ANSI/IES RP-28', 'Washroom - other', 'Warehouse storage area medium to bulky palletized items', 'Warehouse storage area small hand-carried items(4)'] space_types_to_skip['NECB2017'] = ['Atrium (height < 6m)', 'Atrium (6 =< height <= 12m)', 'Atrium (height > 12m)', 'Computer/Server room', 'Copy/Print room', 'Corridor/Transition area - hospital', 'Corridor/Transition area - manufacturing facility', 'Corridor/Transition area - space designed to ANSI/IES RP-28', 'Corridor/Transition area other', 'Electrical/Mechanical room', 'Emergency vehicle garage', 'Lobby - elevator', 'Lobby - hotel', 'Lobby - motion picture theatre', 'Lobby - performing arts theatre', 'Lobby - space designed to ANSI/IES RP-28', 'Lobby - other', 'Locker room', 'Stairway/Stairwell', 'Storage garage interior', 'Storage room < 5 m2', 'Storage room <= 5 m2 <= 100 m2', 'Storage room > 100 m2', 'Washroom - space designed to ANSI/IES RP-28', 'Washroom - other', 'Warehouse storage area medium to bulky palletized items', 'Warehouse storage area small hand-carried items(4)'] zone_does_not_have_vrf_eqpt = false zone.spaces.each do |space| space_types_to_skip.each do |std, spfs| spfs.each do |spf| if space.spaceType.get.name.to_s.downcase.include? spf.downcase zone_does_not_have_vrf_eqpt = true break end end break if zone_does_not_have_vrf_eqpt end break if zone_does_not_have_vrf_eqpt end end