Class: ZEDGK12SWH

Inherits:
OpenStudio::Measure::ModelMeasure
  • Object
show all
Defined in:
lib/measures/zedgk_12_swh/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_swh/measure.rb', line 33

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

  # make an argument for material and installation cost
  costTotalSwhSystem = OpenStudio::Measure::OSArgument.makeDoubleArgument('costTotalSwhSystem', true)
  costTotalSwhSystem.setDisplayName('Total Cost for Kitchen System ($).')
  costTotalSwhSystem.setDefaultValue(0.0)
  args << costTotalSwhSystem

  # make an argument number of students
  numberOfStudents = OpenStudio::Measure::OSArgument.makeIntegerArgument('numberOfStudents', true)
  numberOfStudents.setDisplayName('Total Number of Students.')
  # calculate default value
  # get total number of students
  studentCount = 0
  model.getThermalZones.each do |zone|
    zoneMultiplier = zone.multiplier
    zone.spaces.each do |space|
      if space.spaceType.is_initialized
        if space.spaceType.get.standardsSpaceType.is_initialized
          if space.spaceType.get.standardsSpaceType.get.include? 'Classroom'
            # add up number of people from each classroom space
            studentCount += space.numberOfPeople * zoneMultiplier
          end
        end
      end
    end
  end
  if studentCount.to_i > 0
    numberOfStudents.setDefaultValue(studentCount.to_i)
  end
  args << numberOfStudents
  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_swh/measure.rb', line 28

def name
  return 'ZEDG K12 SWH'
end

#run(model, runner, user_arguments) ⇒ Object

define what happens when the measure is run



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# File 'lib/measures/zedgk_12_swh/measure.rb', line 69

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

  ### START INPUTS
  # assign the user inputs to variables
  costTotalSwhSystem = runner.getDoubleArgumentValue('costTotalSwhSystem', user_arguments)
  numberOfStudents = runner.getIntegerArgumentValue('numberOfStudents', user_arguments)

  # initial condition
  runner.registerInitialCondition("The initial model has #{model.getWaterUseEquipments.size} water use equipment objects")

  # look at upstream measure for 'numberOfStudents' argument
  # todo - in future make template in this measure an optional argument and only override value when it is not initialized. There may be valid use cases for using different template values in different measures within the same workflow.
  value_from_osw = OsLib_HelperMethods.check_upstream_measure_for_arg(runner, 'numberOfStudents')
  if !value_from_osw.empty?
    runner.registerInfo("Replacing argument named 'numberOfStudents' from current measure with a value of #{value_from_osw[:value]} from #{value_from_osw[:measure_name]}.")
    numberOfStudents = value_from_osw[:value].to_i
  end

  # default building/kitchen space types
  standardBuildingTypeTest = ['PrimarySchool', 'SecondarySchool']
  primarySpaceType = 'Classroom'
  swhSpaceTypes = {}
  swhSpaceTypes['PrimarySchool'] = ['Kitchen', 'Restroom']
  swhSpaceTypes['SecondarySchool'] = ['Kitchen', 'Restroom', 'Gym']
  # water use equipment inputs
  waterUsePerStudent = {}
  # kitchen
  kitchenWaterUsePerStudent = {}
  kitchenWaterUsePerStudent['PrimarySchool'] = 0.00000016176923077 # m3/s*student
  kitchenWaterUsePerStudent['SecondarySchool'] = 0.00000011654166667 # m3/s*student
  waterUsePerStudent['Kitchen'] = kitchenWaterUsePerStudent
  # restroom
  restroomWaterUsePerStudent = {}
  restroomWaterUsePerStudent['PrimarySchool'] = 0.00000009145299145 # m3/s*student
  restroomWaterUsePerStudent['SecondarySchool'] = 0.00000009143518519 # m3/s*student
  waterUsePerStudent['Restroom'] = restroomWaterUsePerStudent
  # gym
  gymWaterUsePerStudent = {}
  gymWaterUsePerStudent['PrimarySchool'] = 0 # m3/s*student
  gymWaterUsePerStudent['SecondarySchool'] = 0.00000016602546296 # m3/s*student
  waterUsePerStudent['Gym'] = gymWaterUsePerStudent
  ### END INPUTS

  ### START DETERMINE BUILDING TYPE
  standardBuildingType = false
  if model.building.is_initialized
    if model.building.get.standardsBuildingType.is_initialized
      standardBuildingType = model.building.get.standardsBuildingType.get
    end
  end
  unless standardBuildingType
    # search primary space type for standardsBuildingType
    model.getSpaces.each do |space|
      next if standardBuildingType
      if space.spaceType.is_initialized
        if space.spaceType.get.standardsSpaceType.is_initialized
          if space.spaceType.get.standardsSpaceType.get.include? primarySpaceType
            if space.spaceType.get.standardsBuildingType.is_initialized
              standardBuildingType = space.spaceType.get.standardsBuildingType.get
            end
          end
        end
      end
    end
  end
  building_type = false
  standardBuildingTypeTest.each do |building_type_test|
    if standardBuildingType == building_type_test
      building_type = building_type_test
    end
  end
  unless building_type
    # building type not specified or not appropriate for this measure
    runner.registerInfo("Building type is not specified or not supported.  Measure will proceed assuming type is #{standardBuildingTypeTest[0]}.")
    building_type = standardBuildingTypeTest[0]
  end
  ### END DETERMINE BUILDING TYPE

  ### START FIND REPRESENTATIVE THERMAL ZONES AND SPACES
  # for kitchen and gym, water use will be applied to representative spaces
  # for restroom, water use will be applied to each restroom
  applyMeasure = false
  numberOfRestrooms = 0
  restroomSpaces = []
  representativeZone = {}
  representativeSpace = {}
  swhSpaceTypes[building_type].each do |applicableSpaceType|
    if applicableSpaceType == 'Restroom'
      # get all restroom spaces
      model.getSpaces.each do |space|
        if space.spaceType.is_initialized
          if space.spaceType.get.standardsSpaceType.is_initialized
            if space.spaceType.get.standardsSpaceType.get.include? applicableSpaceType
              restroomSpaces << space
              numberOfRestrooms += 1
            end
          end
        end
      end
      if numberOfRestrooms > 0
        applyMeasure = true
      else
        runner.registerInfo("Model does not have any #{applicableSpaceType} spaces.  Measure will not apply #{applicableSpaceType} recommendations.")
      end
    else
      # applicable space type is kitchen or gym
      maxRepresentativeZoneArea = 0
      spaceTypeZones = []
      representativeZone[applicableSpaceType] = false
      representativeSpace[applicableSpaceType] = false
      # find representative zone
      model.getThermalZones.each do |zone|
        isRepresentativeZone = false
        zoneArea = 0
        zone.spaces.each do |space|
          zoneArea += space.floorArea
          if space.spaceType.is_initialized
            if space.spaceType.get.standardsSpaceType.is_initialized
              if space.spaceType.get.standardsSpaceType.get.include? applicableSpaceType
                # if zone contains an applicable space, assume it is an applicable zone
                isRepresentativeZone = true
              end
            end
          end
        end
        if isRepresentativeZone
          spaceTypeZones << zone
          if zoneArea > maxRepresentativeZoneArea
            # set zone as the representative zone if it is the largest applicable zone
            representativeZone[applicableSpaceType] = zone
            maxRepresentativeZoneArea = zoneArea
          end
        end
      end
      # find largest space in representative zone
      if representativeZone[applicableSpaceType]
        applyMeasure = true
        maxRepresentativeSpaceArea = 0
        representativeZone[applicableSpaceType].spaces.each do |space|
          if space.spaceType.is_initialized
            if space.spaceType.get.standardsSpaceType.is_initialized
              if space.spaceType.get.standardsSpaceType.get.include? applicableSpaceType
                if space.floorArea > maxRepresentativeSpaceArea
                  maxRepresentativeSpaceArea = space.floorArea
                  representativeSpace[applicableSpaceType] = space
                end
              end
            end
          end
        end
      else
        runner.registerInfo("Model does not have any #{applicableSpaceType} spaces.  Measure will not apply #{applicableSpaceType} recommendations.")
      end
    end
  end
  # exit measure if nothing to apply
  unless applyMeasure
    runner.registerInfo('Model does not have any spaces expected to have SWH use.  Measure will not modify the model.')
    return true
  end
  ### END FIND REPRESENTATIVE THERMAL ZONE AND SPACE

  ### START DELETE EXISTING EQUIPMENT
  # remove plant loops for SWH
  model.getPlantLoops.each do |plantLoop|
    usedForSHW = false
    plantLoop.demandComponents.each do |comp|
      if comp.to_WaterUseConnections.is_initialized
        usedForSHW = true
      end
    end
    if usedForSHW
      plantLoop.remove
      runner.registerWarning("#{plantLoop.name} for service water heating will be deleted so that ZEDG recommendations can be applied.")
    end
  end
  ### END DELETE EXISTING EQUIPMENT

  ### START APPLY SWH RECOMMENDATIONS
  # create swh water plant
  swhPlant = OpenStudio::Model::PlantLoop.new(model)
  swhPlant.setName('ZEDG SWH Loop')
  swhPlant.setMaximumLoopTemperature(60)
  swhPlant.setMinimumLoopTemperature(10)
  loopSizing = swhPlant.sizingPlant
  loopSizing.setLoopType('Heating')
  loopSizing.setDesignLoopExitTemperature(60) # ML follows convention of sizing temp being larger than supply temp
  loopSizing.setLoopDesignTemperatureDifference(5)
  # create a pump
  pump = OpenStudio::Model::PumpVariableSpeed.new(model)
  pump.setRatedPumpHead(1) # Pa
  pump.setMotorEfficiency(1.0)
  pump.setCoefficient1ofthePartLoadPerformanceCurve(0)
  pump.setCoefficient2ofthePartLoadPerformanceCurve(1)
  pump.setCoefficient3ofthePartLoadPerformanceCurve(0)
  pump.setCoefficient4ofthePartLoadPerformanceCurve(0)
  # supply components
  # create a water heater
  waterHeater = OpenStudio::Model::WaterHeaterMixed.new(model)
  waterHeater.setTankVolume(1) # ML volume is arbitrary; just needs to be big enough to serve building
  waterHeater.setHeaterThermalEfficiency(0.9)
  waterHeater.setOffCycleParasiticHeatFractiontoTank(0.9)
  waterHeater.setAmbientTemperatureIndicator('Schedule')
  # setpoint temperature schedule
  waterHeaterSetpointSchedule = OsLib_Schedules.createComplexSchedule(model, 'name' => 'ZEDG Water-Heater-Temp-Schedule',
                                                                             'default_day' => ['All Days', [24, 60.0]])
  waterHeater.setSetpointTemperatureSchedule(waterHeaterSetpointSchedule)
  # ambient temperature schedule
  waterHeaterAmbientTemperatureSchedule = OsLib_Schedules.createComplexSchedule(model, 'name' => 'ZEDG Water-Heater-Ambient-Temp-Schedule',
                                                                                       'default_day' => ['All Days', [24, 22.0]])
  waterHeater.setAmbientTemperatureSchedule(waterHeaterAmbientTemperatureSchedule)
  # create a scheduled setpoint manager
  swhSetpointSchedule = OsLib_Schedules.createComplexSchedule(model, 'name' => 'ZEDG SWH-Loop-Temp-Schedule',
                                                                     'default_day' => ['All Days', [24, 60.0]])
  setpointManagerScheduled = OpenStudio::Model::SetpointManagerScheduled.new(model, swhSetpointSchedule)
  # create a supply bypass pipe
  pipeSupplyBypass = OpenStudio::Model::PipeAdiabatic.new(model)
  # create a supply outlet pipe
  pipeSupplyOutlet = OpenStudio::Model::PipeAdiabatic.new(model)
  # demand components
  waterUseEquipmentDefinition = {}
  waterUseConnections = []
  # building swh flow fraction schedule
  ruleset_name = 'ZEDG SWH-Flow-Fraction-Schedule'
  winter_design_day = [[24, 0]]
  summer_design_day = [[24, 1]]
  default_day = ['Weekday', [7, 0.05], [8, 0.10], [9, 0.34], [10, 0.60], [11, 0.63], [12, 0.72], [13, 0.79], [14, 0.83], [15, 0.61], [16, 0.65], [18, 0.10], [19, 0.19], [20, 0.25], [22, 0.22], [23, 0.12], [24, 0.09]]
  rules = []
  rules << ['Weekend', '1/1-12/31', 'Sat/Sun', [8, 0.03], [14, 0.05], [24, 0.03]]
  rules << ['Summer Weekday', '7/1-8/31', 'Mon/Tue/Wed/Thu/Fri', [7, 0.05], [18, 0.10], [19, 0.19], [20, 0.25], [22, 0.22], [23, 0.12], [24, 0.09]]
  optionsFlowFraction = { 'name' => ruleset_name,
                          'winter_design_day' => winter_design_day,
                          'summer_design_day' => summer_design_day,
                          'default_day' => default_day,
                          'rules' => rules }
  flowFractionSchedule = OsLib_Schedules.createComplexSchedule(model, optionsFlowFraction)
  # target temperature schedule
  targetTemperatureSchedule = OsLib_Schedules.createComplexSchedule(model, 'name' => 'ZEDG SWH-Target-Temperature-Schedule',
                                                                           'default_day' => ['All Days', [24, 40]])
  # sensible fraction schedule name
  sensibleFractionSchedule = OsLib_Schedules.createComplexSchedule(model, 'name' => 'ZEDG SWH-Sensible-Fraction-Schedule',
                                                                          'default_day' => ['All Days', [24, 0.2]])
  # latent fraction schedule name
  latentFractionSchedule = OsLib_Schedules.createComplexSchedule(model, 'name' => 'ZEDG SWH-Latent-Fraction-Schedule',
                                                                        'default_day' => ['All Days', [24, 0.05]])
  # hot water supply temperature schedule
  hotWaterSupplyTemperatureSchedule = OsLib_Schedules.createComplexSchedule(model, 'name' => 'ZEDG SWH-Hot-Supply-Temperature-Schedule',
                                                                                   'default_day' => ['All Days', [24, 55]])
  # create water use equipment definitions, equipment, and connections
  swhSpaceTypes[building_type].each do |applicableSpaceType|
    if (applicableSpaceType == 'Restroom') && (numberOfRestrooms > 0)
      waterUsePerRestroom = waterUsePerStudent[applicableSpaceType][building_type] * numberOfStudents / numberOfRestrooms
      # create water use equipment definition for restrooms
      waterUseEquipmentDefinition[applicableSpaceType] = OpenStudio::Model::WaterUseEquipmentDefinition.new(model)
      waterUseEquipmentDefinition[applicableSpaceType].setName("ZEDG #{applicableSpaceType} Water Use")
      waterUseEquipmentDefinition[applicableSpaceType].setPeakFlowRate(waterUsePerRestroom)
      waterUseEquipmentDefinition[applicableSpaceType].setTargetTemperatureSchedule(targetTemperatureSchedule)
      waterUseEquipmentDefinition[applicableSpaceType].setSensibleFractionSchedule(sensibleFractionSchedule)
      waterUseEquipmentDefinition[applicableSpaceType].setLatentFractionSchedule(latentFractionSchedule)
      runner.registerInfo("Adding SWH to #{restroomSpaces.size} restrooms.")
      restroomSpaces.each do |restroomSpace|
        # water use equipment
        waterUseEquipment = OpenStudio::Model::WaterUseEquipment.new(waterUseEquipmentDefinition[applicableSpaceType])
        waterUseEquipment.setSpace(restroomSpace)
        waterUseEquipment.setFlowRateFractionSchedule(flowFractionSchedule)
        # water use connection
        waterUseConnection = OpenStudio::Model::WaterUseConnections.new(model)
        waterUseConnection.addWaterUseEquipment(waterUseEquipment)
        waterUseConnection.setHotWaterSupplyTemperatureSchedule(hotWaterSupplyTemperatureSchedule)
        waterUseConnections << waterUseConnection
      end
    else
      if representativeSpace[applicableSpaceType]
        runner.registerInfo("Adding SWH to #{applicableSpaceType}.")
        # water use equipment definition
        waterUseEquipmentDefinition[applicableSpaceType] = OpenStudio::Model::WaterUseEquipmentDefinition.new(model)
        waterUseEquipmentDefinition[applicableSpaceType].setName("ZEDG #{applicableSpaceType} Water Use")
        waterUse = waterUsePerStudent[applicableSpaceType][building_type] * numberOfStudents
        waterUseEquipmentDefinition[applicableSpaceType].setPeakFlowRate(waterUse)
        waterUseEquipmentDefinition[applicableSpaceType].setTargetTemperatureSchedule(targetTemperatureSchedule)
        waterUseEquipmentDefinition[applicableSpaceType].setSensibleFractionSchedule(sensibleFractionSchedule)
        waterUseEquipmentDefinition[applicableSpaceType].setLatentFractionSchedule(latentFractionSchedule)
        # water use equipment
        waterUseEquipment = OpenStudio::Model::WaterUseEquipment.new(waterUseEquipmentDefinition[applicableSpaceType])
        waterUseEquipment.setSpace(representativeSpace[applicableSpaceType])
        waterUseEquipment.setFlowRateFractionSchedule(flowFractionSchedule)
        # water use connection
        waterUseConnection = OpenStudio::Model::WaterUseConnections.new(model)
        waterUseConnection.addWaterUseEquipment(waterUseEquipment)
        waterUseConnection.setHotWaterSupplyTemperatureSchedule(hotWaterSupplyTemperatureSchedule)
        waterUseConnections << waterUseConnection
      end
    end
  end
  # create a demand bypass pipe
  pipeDemandBypass = OpenStudio::Model::PipeAdiabatic.new(model)
  # create a demand inlet pipe
  pipeDemandInlet = OpenStudio::Model::PipeAdiabatic.new(model)
  # create a demand outlet pipe
  pipeDemandOutlet = OpenStudio::Model::PipeAdiabatic.new(model)
  # connect components to plant loop
  # supply side components
  swhPlant.addSupplyBranchForComponent(waterHeater)
  swhPlant.addSupplyBranchForComponent(pipeSupplyBypass)
  pump.addToNode(swhPlant.supplyInletNode)
  pipeSupplyOutlet.addToNode(swhPlant.supplyOutletNode)
  setpointManagerScheduled.addToNode(swhPlant.supplyOutletNode)
  # demand side components (water coils are added as they are added to airloops and zoneHVAC)
  waterUseConnections.each do |waterUseConnection|
    swhPlant.addDemandBranchForComponent(waterUseConnection)
  end
  swhPlant.addDemandBranchForComponent(pipeDemandBypass)
  pipeDemandInlet.addToNode(swhPlant.demandInletNode)
  pipeDemandOutlet.addToNode(swhPlant.demandOutletNode)
  ### END APPLY SWH RECOMMENDATIONS

  # lifecycle costs
  expected_life = 25
  years_until_costs_start = 0
  costSwh = costTotalSwhSystem
  lcc_mat = OpenStudio::Model::LifeCycleCost.createLifeCycleCost('Service Water Heating', model.getBuilding, costSwh, 'CostPerEach', 'Construction', expected_life, years_until_costs_start).get

  # initial condition
  runner.registerFinalCondition("The final model has #{model.getWaterUseEquipments.size} water use equipment objects")

  return true
end