Class: ZEDGVRFWithDOAS

Inherits:
OpenStudio::Measure::ModelMeasure
  • Object
show all
Defined in:
lib/measures/zedgk_12_hvac_vrf_with_doas/measure.rb

Overview

start the measure

Instance Method Summary collapse

Instance Method Details

#arguments(model) ⇒ Object

define the arguments that the user will input



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# File 'lib/measures/zedgk_12_hvac_vrf_with_doas/measure.rb', line 25

def arguments(model)
  args = OpenStudio::Measure::OSArgumentVector.new

  # create an argument for a space type to be used in the model, to see if one should be mapped as ceiling return air plenum
  spaceTypes = model.getSpaceTypes
  usedSpaceTypes_handle = OpenStudio::StringVector.new
  usedSpaceTypes_displayName = OpenStudio::StringVector.new
  spaceTypes.each do |spaceType| # TODO: - I need to update this to use helper so GUI sorts by display name
    if !spaceType.spaces.empty? # only show space types used in the building
      usedSpaceTypes_handle << spaceType.handle.to_s
      usedSpaceTypes_displayName << spaceType.name.to_s
    end
  end

  # make an argument for space type
  ceilingReturnPlenumSpaceType = OpenStudio::Measure::OSArgument.makeChoiceArgument('ceilingReturnPlenumSpaceType', usedSpaceTypes_handle, usedSpaceTypes_displayName, false)
  ceilingReturnPlenumSpaceType.setDisplayName('This space type should be part of a ceiling return air plenum.')
  args << ceilingReturnPlenumSpaceType

  # make an argument for material and installation cost
  # todo - I would like to split the costing out to the air loops weighted by area of building served vs. just sticking it on the building
  costTotalHVACSystem = OpenStudio::Measure::OSArgument.makeDoubleArgument('costTotalHVACSystem', true)
  costTotalHVACSystem.setDisplayName('Total Cost for HVAC System ($).')
  costTotalHVACSystem.setDefaultValue(0.0)
  args << costTotalHVACSystem

  # make an argument to remove existing costs
  remake_schedules = OpenStudio::Measure::OSArgument.makeBoolArgument('remake_schedules', true)
  remake_schedules.setDisplayName('Apply recommended availability and ventilation schedules for air handlers?')
  remake_schedules.setDefaultValue(true)
  args << remake_schedules

  return args
end

#name ⇒ Object

define the name that a user will see, this method may be deprecated as the display name in PAT comes from the name field in measure.xml



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# File 'lib/measures/zedgk_12_hvac_vrf_with_doas/measure.rb', line 20

def name
  return 'ZEDG VRF with DOAS'
end

#run(model, runner, user_arguments) ⇒ Object

define what happens when the measure is run



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# File 'lib/measures/zedgk_12_hvac_vrf_with_doas/measure.rb', line 61

def run(model, runner, user_arguments)
  super(model, runner, user_arguments)

  # use the built-in error checking
  if !runner.validateUserArguments(arguments(model), user_arguments)
    return false
  end

  # hard coded default values from old measure arguments
  vrfCondenserType = 'AirCooled'
  vrfCoolCOP = 4.0
  vrfHeatCOP = 4.0
  vrfMinOATHPHeat = -4.0
  vrfDefrost = 'Resistive'
  vrfHPHeatRecovery = 'Yes'
  vrfEquivPipingLength = 100.0
  vrfPipingHeight = 35.0
  doasFanType = 'Variable'
  doasERV = 'plate w/o economizer lockout - zedg'
  doasEvap = 'none'
  doasDXEER = 10.0

  parameters = { 'vrfCondenserType' => vrfCondenserType,
                 'vrfCoolCOP' => vrfCoolCOP,
                 'vrfHeatCOP' => vrfHeatCOP,
                 'vrfMinOATHPHeat' => vrfMinOATHPHeat,
                 'vrfDefrost' => vrfDefrost,
                 'vrfHPHeatRecovery' => vrfHPHeatRecovery,
                 'vrfEquivPipingLength' => vrfEquivPipingLength,
                 'vrfPipingHeight' => vrfPipingHeight,
                 'doasFanType' => doasFanType,
                 'doasERV' => doasERV,
                 'doasEvap' => doasEvap,
                 'doasDXEER' => doasDXEER }

  ### START INPUTS
  # assign the user inputs to variables
  ceilingReturnPlenumSpaceType = runner.getOptionalWorkspaceObjectChoiceValue('ceilingReturnPlenumSpaceType', user_arguments, model)
  costTotalHVACSystem = runner.getDoubleArgumentValue('costTotalHVACSystem', user_arguments)
  remake_schedules = runner.getBoolArgumentValue('remake_schedules', user_arguments)
  # check that spaceType was chosen and exists in model
  ceilingReturnPlenumSpaceTypeCheck = OsLib_HelperMethods.checkOptionalChoiceArgFromModelObjects(ceilingReturnPlenumSpaceType, 'ceilingReturnPlenumSpaceType', 'to_SpaceType', runner, user_arguments)
  ceilingReturnPlenumSpaceTypeCheck == false ? (return false) : (ceilingReturnPlenumSpaceType = ceilingReturnPlenumSpaceTypeCheck['modelObject'])
  # default building/ secondary space types
  standardBuildingTypeTest = [] # ML Not used yet
  secondarySpaceTypeTest = ['Cafeteria', 'Kitchen', 'Gym', 'Auditorium']
  primarySpaceType = 'Office'
  if doasFanType == 'Variable'
    primaryHVAC = { 'doas' => true, 'fan' => 'Variable', 'heat' => 'SingleDX', 'cool' => 'TwoSpeedDX' }
  else
    primaryHVAC = { 'doas' => true, 'fan' => 'Constant', 'heat' => 'Gas', 'cool' => 'SingleDX' }
  end
  secondaryHVAC = { 'fan' => 'None', 'heat' => 'None', 'cool' => 'None' } # ML not used for office; leave or empty?
  zoneHVAC = 'VRF'
  chillerType = 'None' # set to none if chiller not used
  radiantChillerType = 'None' # set to none if not radiant system
  allHVAC = { 'primary' => primaryHVAC, 'secondary' => secondaryHVAC, 'zone' => zoneHVAC }

  ### END INPUTS

  ### START SORT ZONES
  options = { 'standardBuildingTypeTest' => standardBuildingTypeTest, # ML Not used yet
              'secondarySpaceTypeTest' => secondarySpaceTypeTest,
              'ceilingReturnPlenumSpaceType' => ceilingReturnPlenumSpaceType }
  zonesSorted = OsLib_HVAC_zedg_vrf.sortZones(model, runner, options)
  zonesPrimary = zonesSorted['zonesPrimary']
  zonesSecondary = zonesSorted['zonesSecondary']
  zonesPlenum = zonesSorted['zonesPlenum']
  zonesUnconditioned = zonesSorted['zonesUnconditioned']
  ### END SORT ZONES

  ### START REPORT INITIAL CONDITIONS
  OsLib_HVAC_zedg_vrf.reportConditions(model, runner, 'initial')
  ### END REPORT INITIAL CONDITIONS

  ### START ASSIGN HVAC SCHEDULES
  options = { 'primarySpaceType' => primarySpaceType,
              'allHVAC' => allHVAC,
              'remake_schedules' => remake_schedules }
  schedulesHVAC = OsLib_HVAC_zedg_vrf.assignHVACSchedules(model, runner, options)
  # assign schedules
  primary_SAT_schedule = schedulesHVAC['primary_sat']
  building_HVAC_schedule = schedulesHVAC['hvac']
  building_ventilation_schedule = schedulesHVAC['ventilation']
  make_hot_water_plant = false
  unless schedulesHVAC['hot_water'].nil?
    hot_water_setpoint_schedule = schedulesHVAC['hot_water']
    make_hot_water_plant = true
  end
  make_chilled_water_plant = false
  unless schedulesHVAC['chilled_water'].nil?
    chilled_water_setpoint_schedule = schedulesHVAC['chilled_water']
    make_chilled_water_plant = true
  end
  make_radiant_hot_water_plant = false
  unless schedulesHVAC['radiant_hot_water'].nil?
    radiant_hot_water_setpoint_schedule = schedulesHVAC['radiant_hot_water']
    make_radiant_hot_water_plant = true
  end
  make_radiant_chilled_water_plant = false
  unless schedulesHVAC['radiant_chilled_water'].nil?
    radiant_chilled_water_setpoint_schedule = schedulesHVAC['radiant_chilled_water']
    make_radiant_chilled_water_plant = true
  end
  unless schedulesHVAC['hp_loop'].nil?
    heat_pump_loop_setpoint_schedule = schedulesHVAC['hp_loop']
  end
  unless schedulesHVAC['hp_loop_cooling'].nil?
    heat_pump_loop_cooling_setpoint_schedule = schedulesHVAC['hp_loop_cooling']
  end
  unless schedulesHVAC['hp_loop_heating'].nil?
    heat_pump_loop_heating_setpoint_schedule = schedulesHVAC['hp_loop_heating']
  end
  unless schedulesHVAC['mean_radiant_heating'].nil?
    mean_radiant_heating_setpoint_schedule = schedulesHVAC['mean_radiant_heating']
  end
  unless schedulesHVAC['mean_radiant_cooling'].nil?
    mean_radiant_cooling_setpoint_schedule = schedulesHVAC['mean_radiant_cooling']
  end
  ### END ASSIGN HVAC SCHEDULES

  # START REMOVE EQUIPMENT
  options = {}
  options['zonesPrimary'] = zonesPrimary
  if options['zonesPrimary'].empty?
    runner.registerInfo('User did not pick any zones to be added to VRF system, no changes to the model were made.')
  else
    OsLib_HVAC_zedg_vrf.removeEquipment(model, runner, options)
  end
  ### END REMOVE EQUIPMENT

  ### START CREATE NEW PLANTS
  # create new plants
  # hot water plant
  if make_hot_water_plant
    hot_water_plant = OsLib_HVAC_zedg_vrf.createHotWaterPlant(model, runner, hot_water_setpoint_schedule, 'Hot Water', parameters)
  end
  # chilled water plant
  if make_chilled_water_plant
    chilled_water_plant = OsLib_HVAC_zedg_vrf.createChilledWaterPlant(model, runner, chilled_water_setpoint_schedule, 'Chilled Water', chillerType)
  end
  # radiant hot water plant
  if make_radiant_hot_water_plant
    radiant_hot_water_plant = OsLib_HVAC_zedg_vrf.createHotWaterPlant(model, runner, radiant_hot_water_setpoint_schedule, 'Radiant Hot Water', parameters)
  end
  # chilled water plant
  if make_radiant_chilled_water_plant
    radiant_chilled_water_plant = OsLib_HVAC_zedg_vrf.createChilledWaterPlant(model, runner, radiant_chilled_water_setpoint_schedule, 'Radiant Chilled Water', radiantChillerType)
  end
  # condenser loop
  # need condenser loop if there is a water-cooled chiller or if there is a water source heat pump loop or a water cooled VRF condenser
  options = {}
  options['zonesPrimary'] = zonesPrimary
  options['zoneHVAC'] = zoneHVAC
  if zoneHVAC.include?('SHP') || (zoneHVAC == 'VRF') && (parameters['vrfCondenserType'] == 'WaterCooled')
    options['loop_setpoint_schedule'] = heat_pump_loop_setpoint_schedule
    options['cooling_setpoint_schedule'] = heat_pump_loop_cooling_setpoint_schedule
    options['heating_setpoint_schedule'] = heat_pump_loop_heating_setpoint_schedule
    runner.registerInfo('yes, loop schedule created')
  end
  if parameters['vrfCondenserType'] == 'WaterCooled'
    condenserLoops = OsLib_HVAC_zedg_vrf.createCondenserLoop(model, runner, options, parameters)
  else
    condenserLoops = {}
    end
  unless condenserLoops['condenser_loop'].nil?
    condenser_loop = condenserLoops['condenser_loop']
  end
  unless condenserLoops['heat_pump_loop'].nil?
    heat_pump_loop = condenserLoops['heat_pump_loop']
    runner.registerInfo('vrf condenser loop is created')
  end
  ### END CREATE NEW PLANTS

  ### START CREATE PRIMARY AIRLOOPS
  # populate inputs hash for create primary airloops method
  options = {}
  options['zonesPrimary'] = zonesPrimary
  options['primaryHVAC'] = primaryHVAC
  options['zoneHVAC'] = zoneHVAC
  if primaryHVAC['doas']
    options['hvac_schedule'] = building_ventilation_schedule
    options['ventilation_schedule'] = building_ventilation_schedule
  else
    # primary HVAC is multizone VAV
    if zoneHVAC == 'DualDuct'
      # primary system is a multizone VAV that cools only (primary system ventilation schedule is set to always off; hvac set to always on)
      options['hvac_schedule'] = model.alwaysOnDiscreteSchedule
    else
      # primary system is multizone VAV that cools and ventilates
      options['hvac_schedule'] = building_HVAC_schedule
      options['ventilation_schedule'] = building_ventilation_schedule
    end
  end
  options['primary_sat_schedule'] = primary_SAT_schedule
  if make_hot_water_plant
    options['hot_water_plant'] = hot_water_plant
  end
  if make_chilled_water_plant
    options['chilled_water_plant'] = chilled_water_plant
  end
  primary_airloops = OsLib_HVAC_zedg_vrf.createPrimaryAirLoops(model, runner, options, parameters)
  ### END CREATE PRIMARY AIRLOOPS
  if zoneHVAC.include? 'VRF'
    options['heat_pump_loop'] = heat_pump_loop
  end

  # string check for components used twice
  string_check = 'v350.osc' # change to `old.osc` to test using 1.x source OSC files

  # added in custom code to load components to be used by createVRFAirConditioners
  files = Dir.entries("#{File.dirname(__FILE__)}/resources/")
  files.each do |new_object|
    next if !new_object.include?(string_check)

    # load the osc file
    new_object_path = OpenStudio::Path.new("#{File.dirname(__FILE__)}/resources/#{new_object}")
    new_object_file = OpenStudio::IdfFile.load(new_object_path)

    if new_object_file.empty?
      runner.registerError("Unable to find the file #{new_object}.osc")
      return false
    else
      new_object_file = new_object_file.get
    end

    vt = OpenStudio::OSVersion::VersionTranslator.new
    new_objectComponent = vt.loadComponent(OpenStudio::Path.new(new_object_path))
    if new_objectComponent.empty?
      runner.registerError("Cannot load new_object component '#{new_object_file}'")
      return false
    else
      object = new_objectComponent.get.primaryObject
      componentData = model.insertComponent(new_objectComponent.get)
      if componentData.empty?
        runner.registerError("Failed to insert new_object component '#{new_object_file}' into model")
        return false
      else
        new_new_object = componentData.get.primaryComponentObject
        runner.registerInfo("Added #{new_new_object.name} into model")

        # add to options hash
        if new_new_object.to_AirConditionerVariableRefrigerantFlow.is_initialized
          options['vrf_ac'] = new_new_object
        elsif new_new_object.to_ZoneHVACTerminalUnitVariableRefrigerantFlow.is_initialized
          options['vrf_terminal'] = new_new_object
        else
          runner.regsiterError('Unexpected object type')
          return false
        end

      end
    end
  end

  vrf_airconditioners = OsLib_HVAC_zedg_vrf.createVRFAirConditioners(model, runner, options, parameters)

  ### START CREATE SECONDARY AIRLOOPS
  # populate inputs hash for create primary airloops method
  options = {}
  options['zonesSecondary'] = zonesSecondary
  options['secondaryHVAC'] = secondaryHVAC
  options['hvac_schedule'] = building_HVAC_schedule
  options['ventilation_schedule'] = building_ventilation_schedule
  if make_hot_water_plant
    options['hot_water_plant'] = hot_water_plant
  end
  if make_chilled_water_plant
    options['chilled_water_plant'] = chilled_water_plant
  end
  # secondary_airloops = OsLib_HVAC_zedg_vrf.createSecondaryAirLoops(model, runner, options)
  ### END CREATE SECONDARY AIRLOOPS

  ### START ASSIGN PLENUMS
  options = { 'zonesPrimary' => zonesPrimary, 'zonesPlenum' => zonesPlenum }
  zone_plenum_hash = OsLib_HVAC_zedg_vrf.validateAndAddPlenumZonesToSystem(model, runner, options)
  ### END ASSIGN PLENUMS

  ### START CREATE PRIMARY ZONE EQUIPMENT
  options = {}
  options['zonesPrimary'] = zonesPrimary
  options['zoneHVAC'] = zoneHVAC
  if make_hot_water_plant
    options['hot_water_plant'] = hot_water_plant
  end
  if make_chilled_water_plant
    options['chilled_water_plant'] = chilled_water_plant
  end
  if zoneHVAC.include?('SHP') || (zoneHVAC == 'VRF')
    options['heat_pump_loop'] = heat_pump_loop
  end
  if zoneHVAC == 'DualDuct'
    options['ventilation_schedule'] = building_ventilation_schedule
  end
  if zoneHVAC == 'Radiant'
    options['radiant_hot_water_plant'] = radiant_hot_water_plant
    options['radiant_chilled_water_plant'] = radiant_chilled_water_plant
    options['mean_radiant_heating_setpoint_schedule'] = mean_radiant_heating_setpoint_schedule
    options['mean_radiant_cooling_setpoint_schedule'] = mean_radiant_cooling_setpoint_schedule
  end
  OsLib_HVAC_zedg_vrf.createPrimaryZoneEquipment(model, runner, options, parameters)
  ### END CREATE PRIMARY ZONE EQUIPMENT

  # START ADD DCV
  options = {}
  unless zoneHVAC == 'DualDuct'
    options['primary_airloops'] = primary_airloops
  end
  # options["secondary_airloops"] = secondary_airloops
  options['allHVAC'] = allHVAC
  OsLib_HVAC_zedg_vrf.addDCV(model, runner, options)
  # END ADD DCV

  # add in lifecycle costs
  expected_life = 25
  years_until_costs_start = 0
  costHVAC = costTotalHVACSystem
  lcc_mat = OpenStudio::Model::LifeCycleCost.createLifeCycleCost('HVAC System', model.getBuilding, costHVAC, 'CostPerEach', 'Construction', expected_life, years_until_costs_start).get

  # added in custom code to load components to be used by createVRFAirConditioners
  base_vrf_ac = nil
  base_vrf_terminalUnit = nil
  files = Dir.entries("#{File.dirname(__FILE__)}/resources/")
  files.each do |new_object|
    next if !new_object.include?(string_check)
    runner.registerInfo("Importing component from #{new_object}")

    # load the osc file
    new_object_path = OpenStudio::Path.new("#{File.dirname(__FILE__)}/resources/#{new_object}")
    new_object_file = OpenStudio::IdfFile.load(new_object_path)

    if new_object_file.empty?
      runner.registerError("Unable to find the file #{new_object}.osc")
      return false
    else
      new_object_file = new_object_file.get
    end

    vt = OpenStudio::OSVersion::VersionTranslator.new
    new_objectComponent = vt.loadComponent(OpenStudio::Path.new(new_object_path))
    if new_objectComponent.empty?
      runner.registerError("Cannot load new_object component '#{new_object_file}'")
      return false
    else
      object = new_objectComponent.get.primaryObject
      componentData = model.insertComponent(new_objectComponent.get)
      if componentData.empty?
        runner.registerError("Failed to insert new_object component '#{new_object_file}' into model")
        return false
      else
        new_new_object = componentData.get.primaryComponentObject
        runner.registerInfo("Added #{new_new_object.name} into model")

        # add to options hash
        if new_new_object.to_AirConditionerVariableRefrigerantFlow.is_initialized
          base_vrf_ac = new_new_object
        elsif new_new_object.to_ZoneHVACTerminalUnitVariableRefrigerantFlow.is_initialized
          base_vrf_terminalUnit = new_new_object
        else
          runner.regsiterError('Unexpected object type')
          return false
        end

      end
    end
  end

  # add and alter base vrf acbase units in model
  base_vrf_ac = base_vrf_ac.to_AirConditionerVariableRefrigerantFlow.get
  base_vrf_ac.autosizeRatedTotalCoolingCapacity
  base_vrf_ac.autosizeRatedTotalHeatingCapacity
  base_vrf_ac.setHeatPumpWasteHeatRecovery(true)

  # add and alter base vrf terminal
  base_vrf_terminalUnit = base_vrf_terminalUnit.to_ZoneHVACTerminalUnitVariableRefrigerantFlow.get
  base_vrf_terminalUnit.autosizeSupplyAirFlowRateDuringCoolingOperation
  base_vrf_terminalUnit.autosizeSupplyAirFlowRateDuringHeatingOperation
  base_vrf_terminalUnit.setSupplyAirFanOperatingModeSchedule(model.alwaysOffDiscreteSchedule)
  # don't set outdoor air flow rates to 0 since used in place of DOAS

  # get coils
  os_version = OpenStudio::VersionString.new(OpenStudio.openStudioVersion)
  min_version_feature1 = OpenStudio::VersionString.new('2.3.1')
  if os_version >= min_version_feature1
    if base_vrf_terminalUnit.coolingCoil.is_initialized
      vrf_clg_coil = base_vrf_terminalUnit.coolingCoil.get.to_CoilCoolingDXVariableRefrigerantFlow.get
    else
      runner.registerWarning("Didn't find expected cooling coil for #{base_vrf_terminalUnit.name}")
    end
    if base_vrf_terminalUnit.heatingCoil.is_initialized
      vrf_htg_coil = base_vrf_terminalUnit.heatingCoil.get.to_CoilHeatingDXVariableRefrigerantFlow.get
    else
      runner.registerWarning("Didn't find expected heating coil for #{base_vrf_terminalUnit.name}")
    end
  else
    vrf_clg_coil = base_vrf_terminalUnit.coolingCoil
    vrf_htg_coil = base_vrf_terminalUnit.heatingCoil
  end

  # alter coils and fans
  vrf_clg_coil.autosizeRatedTotalCoolingCapacity
  vrf_clg_coil.autosizeRatedAirFlowRate
  vrf_clg_coil.autosizeRatedSensibleHeatRatio
  vrf_htg_coil.autosizeRatedTotalHeatingCapacity
  vrf_htg_coil.autosizeRatedAirFlowRate
  vrf_fan = base_vrf_terminalUnit.supplyAirFan.to_FanOnOff.get
  vrf_fan.autosizeMaximumFlowRate
  vrf_fan.setPressureRise(498)
  vrf_fan.setMotorEfficiency(0.85)

  # loop through zones assing HVAC
  zonesSecondary.each do |zone|
    runner.registerInfo("Adding VRF to #{zone.name}")

    # clone vrf_ac
    vrfAirConditioner = base_vrf_ac.clone(model).to_AirConditionerVariableRefrigerantFlow.get

    # construct Terminal VRF Unit
    vrf_terminalUnit = base_vrf_terminalUnit.clone(model).to_ZoneHVACTerminalUnitVariableRefrigerantFlow.get

    vrf_terminalUnit.addToThermalZone(zone)
    vrfAirConditioner.addTerminal(vrf_terminalUnit)
  end

  # remove base vrf units that were cloned into stories and spaces
  base_vrf_ac.remove
  base_vrf_terminalUnit.remove

  ### START REPORT FINAL CONDITIONS
  OsLib_HVAC_zedg_vrf.reportConditions(model, runner, 'final')
  ### END REPORT FINAL CONDITIONS

  return true
end