Class: ZEDGK12InteriorLighting

Inherits:
OpenStudio::Measure::ModelMeasure
  • Object
show all
Defined in:
lib/measures/zedgk_12_interior_lighting/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_interior_lighting/measure.rb', line 33

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

  # make an argument for material and installation cost
  material_cost_ip = OpenStudio::Measure::OSArgument.makeDoubleArgument('material_cost_ip', true)
  material_cost_ip.setDisplayName('Material and Installation Costs for Lights per Floor Area ($/ft^2).')
  material_cost_ip.setDefaultValue(0.0)
  args << material_cost_ip

  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_interior_lighting/measure.rb', line 28

def name
  return 'ZEDG K12 Interior Lighting'
end

#run(model, runner, user_arguments) ⇒ Object

define what happens when the measure is run



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# File 'lib/measures/zedgk_12_interior_lighting/measure.rb', line 46

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

  # assign the user inputs to variables
  material_cost_ip = runner.getDoubleArgumentValue('material_cost_ip', user_arguments)

  # prepare rule hash
  rules = [] # target, space type, LPD_ip

  # currently only target is lower energy, but setup hash this way so could add baseline in future
  # climate zone doesn't impact values for LPD in ZEDG

  # populate rules hash
  rules << ['LowEnergy', 'PrimarySchool', 'Auditorium', 0.5] # no change
  rules << ['LowEnergy', 'PrimarySchool', 'Cafeteria', 0.4] # changed from 0.7 to 0.4
  rules << ['LowEnergy', 'PrimarySchool', 'Classroom', 0.4] # changed from 0.8 to 0.4
  rules << ['LowEnergy', 'PrimarySchool', 'Corridor', 0.4] # no change
  rules << ['LowEnergy', 'PrimarySchool', 'Gym', 0.5] # changed from 1.0 to 0.5
  rules << ['LowEnergy', 'PrimarySchool', 'Kitchen', 0.6] # changed from 0.8 to 0.6 (first pass zedg was 0.45)
  rules << ['LowEnergy', 'PrimarySchool', 'Library', 0.4] # changed from 0.8 to 0.4
  rules << ['LowEnergy', 'PrimarySchool', 'Lobby', 0.7] # changed from 0.7 to 0.7 (first pass zedg was 0.5)
  rules << ['LowEnergy', 'PrimarySchool', 'Mechanical', 0.4] # no change
  rules << ['LowEnergy', 'PrimarySchool', 'Office', 0.5] # changed from 0.6 to 0.5
  rules << ['LowEnergy', 'PrimarySchool', 'Restroom', 0.4] # changed from 0.5 to 0.4
  rules << ['LowEnergy', 'SecondarySchool', 'Auditorium', 0.5] # no change
  rules << ['LowEnergy', 'SecondarySchool', 'Cafeteria', 0.4] # changed from 0.7 to 0.4
  rules << ['LowEnergy', 'SecondarySchool', 'Classroom', 0.4] # changed from 0.8 to 0.4
  rules << ['LowEnergy', 'SecondarySchool', 'Corridor', 0.4] # no change
  rules << ['LowEnergy', 'SecondarySchool', 'Gym', 0.8] # changed from 1.0 to 0.75 then to 0.8
  rules << ['LowEnergy', 'SecondarySchool', 'Kitchen', 0.6] # changed from 0.8 to 0.6 (first pass zedg was 0.45)
  rules << ['LowEnergy', 'SecondarySchool', 'Library', 0.5] # changed from 0.8 to 0.5
  rules << ['LowEnergy', 'SecondarySchool', 'Lobby', 0.7] # changed from 0.7 to 0.7 (first pass zedg was 0.5)
  rules << ['LowEnergy', 'SecondarySchool', 'Mechanical', 0.4] # no change
  rules << ['LowEnergy', 'SecondarySchool', 'Office', 0.5] # changed from 0.6 to 0.5
  rules << ['LowEnergy', 'SecondarySchool', 'Restroom', 0.4] # changed from 0.5 to 0.4

  # make rule hash for cleaner code
  rulesHash = {}
  rules.each do |rule|
    rulesHash["#{rule[0]} #{rule[1]} #{rule[2]}"] = rule[3]
  end

  # calculate building LPD
  building = model.getBuilding
  initialLpdDisplay = OsLib_HelperMethods.neatConvertWithUnitDisplay(building.lightingPowerPerFloorArea, 'W/m^2', 'W/ft^2', 2) # can add choices for unit display

  # calculate initial LPD to use later
  lightDefs = model.getLightsDefinitions
  initialCostForLights = OsLib_HelperMethods.getTotalCostForObjects(lightDefs)

  # reporting initial condition of model
  runner.registerInitialCondition("The building started with an LPD #{initialLpdDisplay}.")

  # global variables for costs
  expected_life = 25
  years_until_costs_start = 0

  # loop through space types
  model.getSpaceTypes.each do |spaceType|
    # skip of not used in model
    next if spaceType.spaces.empty?

    # confirm recognized spaceType standards information
    standardsInfo = OsLib_HelperMethods.getSpaceTypeStandardsInformation([spaceType])
    if rulesHash["LowEnergy #{standardsInfo[spaceType][0]} #{standardsInfo[spaceType][1]}"].nil?
      runner.registerInfo("Couldn't map #{spaceType.name} to a recognized space type used in the ZEDG. Lighting levels for this SpaceType will not be altered.")
      next
    end

    # get initial LPD for space type
    initialSpaceTypeLpd = OsLib_LightingAndEquipment.getLpdForSpaceArray(spaceType.spaces)

    # get target LPD
    targetLPD = OpenStudio.convert(rulesHash["LowEnergy #{standardsInfo[spaceType][0]} #{standardsInfo[spaceType][1]}"], 'W/ft^2', 'W/m^2').to_f

    # harvest any hard assigned schedules along with lighting power of light. If there is no default the use the largest one of these
    oldLights = []
    spaceType.lights.each do |light|
      oldLights << light
    end

    # remove lights associated directly with spaces
    spaceLightRemoved = false
    spaceLightsSchedules = []
    spaceType.spaces.each do |space|
      lights = space.lights
      lights.each do |light|
        oldLights << light
        light.remove
        spaceLightRemoved = true
      end
    end

    # in future versions will use (lighting power)weighted average schedule merge for new schedule
    oldScheduleHash = OsLib_LightingAndEquipment.createHashOfInternalLoadWithHardAssignedSchedules(oldLights)
    oldLights.size == oldScheduleHash.size ? (defaultUsedAtLeastOnce = false) : (defaultUsedAtLeastOnce = true)

    # add new lights
    spaceType.setLightingPowerPerFloorArea(targetLPD) # not sure if this is instance or def?
    newLight = spaceType.lights[0]
    newLightDef = newLight.lightsDefinition
    newLightDef.setName("ZEDG K12 - #{standardsInfo[spaceType][1]} lights")

    # add cost to lights
    lcc_lights = OpenStudio::Model::LifeCycleCost.createLifeCycleCost("lcc_#{newLightDef.name}", newLightDef, material_cost_ip, 'CostPerArea', 'Construction', expected_life, years_until_costs_start)

    # report change
    if !spaceType.lightingPowerPerFloorArea.empty?
      oldLpdDisplay = OsLib_HelperMethods.neatConvertWithUnitDisplay(initialSpaceTypeLpd, 'W/m^2', 'W/ft^2', 1)
      newLpdDisplay = OsLib_HelperMethods.neatConvertWithUnitDisplay(spaceType.lightingPowerPerFloorArea.get, 'W/m^2', 'W/ft^2', 1) # can add choices for unit display
      runner.registerInfo("Changing LPD of #{spaceType.name} space type to #{newLpdDisplay} from #{oldLpdDisplay}")
    else
      runner.registerInfo("For some reason no LPD was set for #{spaceType.name} space type.")
    end

    if spaceLightRemoved
      runner.registerInfo("One more more lights directly assigned to spaces using #{spaceType.name} were removed. This is to limit lighting to what is added by this measure.")
    end

    # adjust schedules as necessary only hard assign if the default schedule was never used
    if (defaultUsedAtLeastOnce == false) && !oldLights.empty?
      # retrieve hard assigned schedule
      newLight.setSchedule(oldScheduleHash.sort.reverse[0][0])
    else
      if newLight.schedule.empty?
        runner.registerWarning("Didn't find an inherited or hard assigned schedule for lights in #{spaceType.name} or underlying spaces. Please add a schedule before running a simulation.")
      end
    end
  end

  # warn if some spaces didn't have lights altered at all (this would apply to spaces with space types not mapped)
  model.getSpaces.each do |space|
    next if !space.spaceType.empty?
    runner.registerWarning("#{space.name} doesn't have a space type. Couldn't identify target LPD without a space type. Lights were not altered.")
  end

  # calculate final building LPD
  building = model.getBuilding
  finalLpdDisplay = OsLib_HelperMethods.neatConvertWithUnitDisplay(building.lightingPowerPerFloorArea, 'W/m^2', 'W/ft^2', 2) # can add choices for unit display

  # calculate final LPD to use later
  lightDefs = model.getLightsDefinitions
  finalCostForLights = OsLib_HelperMethods.getTotalCostForObjects(lightDefs)

  # change in cost
  costRelatedToMeasure = finalCostForLights - initialCostForLights
  costRelatedToMeasureDisplay = OsLib_HelperMethods.neatConvertWithUnitDisplay(costRelatedToMeasure, '$', '$', 0, true, false, false, false) # bools (prefix,suffix,space,parentheses)

  # reporting final condition of model
  if costRelatedToMeasure > 0
    runner.registerFinalCondition("The resulting building has an LPD #{finalLpdDisplay}. Initial capital cost related to this measure is #{costRelatedToMeasureDisplay}.")
  else
    runner.registerFinalCondition("The resulting building has an LPD #{finalLpdDisplay}.")
  end

  return true
end