Class: EnableDemandControlledVentilation

Inherits:
OpenStudio::Measure::ModelMeasure
  • Object
show all
Defined in:
lib/measures/Enable Demand Controlled Ventilation/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/Enable Demand Controlled Ventilation/measure.rb', line 26

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

  # make choice argument economizer control type
  choices = OpenStudio::StringVector.new
  choices << 'EnableDCV'
  choices << 'DisableDCV'
  choices << 'NoChange'
  dcv_type = OpenStudio::Measure::OSArgument.makeChoiceArgument('dcv_type', choices, true)
  dcv_type.setDisplayName('DCV Type')
  args << dcv_type

  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/Enable Demand Controlled Ventilation/measure.rb', line 21

def name
  return 'Enable Demand Controlled Ventilation'
end

#neat_numbers(number, roundto = 2) ⇒ Object

short def to make numbers pretty (converts 4125001.25641 to 4,125,001.26 or 4,125,001). The definition be called through this measure



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# File 'lib/measures/Enable Demand Controlled Ventilation/measure.rb', line 61

def neat_numbers(number, roundto = 2) # round to 0 or 2)
  if roundto == 2
    number = format '%.2f', number
  else
    number = number.round
  end
  # regex to add commas
  number.to_s.reverse.gsub(/([0-9]{3}(?=([0-9])))/, '\\1,').reverse
end

#run(model, runner, user_arguments) ⇒ Object

define what happens when the measure is cop



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# File 'lib/measures/Enable Demand Controlled Ventilation/measure.rb', line 42

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
  dcv_type = runner.getStringArgumentValue('dcv_type', user_arguments)

  # Note if dcv_type == NoChange
  # and register as N/A
  if dcv_type == 'NoChange'
    runner.registerAsNotApplicable('N/A - User requested No Change in economizer operation.')
    return true
  end

  # short def to make numbers pretty (converts 4125001.25641 to 4,125,001.26 or 4,125,001). The definition be called through this measure
  def neat_numbers(number, roundto = 2) # round to 0 or 2)
    if roundto == 2
      number = format '%.2f', number
    else
      number = number.round
    end
    # regex to add commas
    number.to_s.reverse.gsub(/([0-9]{3}(?=([0-9])))/, '\\1,').reverse
  end

  # info for initial condition
  air_loops_changed = []

  # loop through air loops
  model.getAirLoopHVACs.each do |air_loop|
    # find AirLoopHVACOutdoorAirSystem on loop
    air_loop.supplyComponents.each do |supply_component|
      hVACComponent = supply_component.to_AirLoopHVACOutdoorAirSystem
      if !hVACComponent.empty?
        hVACComponent = hVACComponent.get

        # get ControllerOutdoorAir
        controller_oa = hVACComponent.getControllerOutdoorAir

        # get ControllerMechanicalVentilation
        controller_mv = controller_oa.controllerMechanicalVentilation

        if dcv_type == 'EnableDCV'
          # check if demand control is enabled, if not, then enable it
          if controller_mv.demandControlledVentilation == true
            runner.registerInfo("#{air_loop.name} already has DCV enabled.")
          else
            controller_mv.setDemandControlledVentilation(true)
            runner.registerInfo("Enabling DCV for #{air_loop.name}.")
            air_loops_changed << air_loop
          end
        elsif dcv_type == 'DisableDCV'
          # check if demand control is disabled, if not, then disabled it
          if controller_mv.demandControlledVentilation == false
            runner.registerInfo("#{air_loop.name} already has DCV disabled.")
          else
            controller_mv.setDemandControlledVentilation(false)
            runner.registerInfo("Disabling DCV for #{air_loop.name}.")
            air_loops_changed << air_loop
          end
        end

      end
    end
  end

  # Report N/A if none of the air loops were changed
  if air_loops_changed.empty?
    runner.registerAsNotApplicable('No air loops had DCV enabled or disabled.')
    return true
  end

  # Report final condition of model
  runner.registerFinalCondition("#{air_loops_changed.size} air loops now have demand controlled ventilation enabled.")

  return true
end