Class: TariffSelectionTimeAndDateDependant

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

Overview

start the measure

Instance Method Summary collapse

Instance Method Details

#arguments(workspace) ⇒ Object

define the arguments that the user will input



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# File 'lib/measures/tariff_selection_time_and_date_dependant/measure.rb', line 27

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

  # make choice argument for facade
  choices = OpenStudio::StringVector.new
  choices << 'QuarterHour'
  choices << 'HalfHour'
  choices << 'FullHour'
  # don't want to offer Day or Week even though valid E+ options
  # choices << "Day"
  # choices << "Week"
  demand_window_length = OpenStudio::Measure::OSArgument.makeChoiceArgument('demand_window_length', choices, true)
  demand_window_length.setDisplayName('Demand Window Length.')
  demand_window_length.setDefaultValue('QuarterHour')
  args << demand_window_length

  # adding argument for summer_start_month
  summer_start_month = OpenStudio::Measure::OSArgument.makeIntegerArgument('summer_start_month', true)
  summer_start_month.setDisplayName('Month Summer Begins')
  summer_start_month.setDescription('1-12')
  summer_start_month.setDefaultValue(5)
  summer_start_month.setMinValue(1.0)
  summer_start_month.setMaxValue(12.0)
  args << summer_start_month

  # adding argument for summer_start_day
  summer_start_day = OpenStudio::Measure::OSArgument.makeIntegerArgument('summer_start_day', true)
  summer_start_day.setDisplayName('Day Summer Begins')
  summer_start_day.setDescription('1-31')
  summer_start_day.setDefaultValue(1)
  summer_start_day.setMinValue(1.0)
  summer_start_day.setMaxValue(31.0)
  args << summer_start_day

  # adding argument for summer_end_month
  summer_end_month = OpenStudio::Measure::OSArgument.makeIntegerArgument('summer_end_month', true)
  summer_end_month.setDisplayName('Month Summer Ends')
  summer_end_month.setDescription('1-12')
  summer_end_month.setDefaultValue(9)
  summer_end_month.setMinValue(1.0)
  summer_end_month.setMaxValue(12.0)
  args << summer_end_month

  # adding argument for summer_end_day
  summer_end_day = OpenStudio::Measure::OSArgument.makeIntegerArgument('summer_end_day', true)
  summer_end_day.setDisplayName('Day Summer Ends')
  summer_end_day.setDescription('1-31')
  summer_end_day.setDefaultValue(1)
  summer_end_day.setMinValue(1.0)
  summer_end_day.setMaxValue(31.0)
  args << summer_end_day

  # adding argument for peak_start_hour
  peak_start_hour = OpenStudio::Measure::OSArgument.makeDoubleArgument('peak_start_hour', true)
  peak_start_hour.setDisplayName('Hour Peak Begins')
  peak_start_hour.setDescription('1-24')
  peak_start_hour.setDefaultValue(12)
  peak_start_hour.setMinValue(0.0)
  peak_start_hour.setMaxValue(24.0)
  args << peak_start_hour

  # adding argument for peak_end_hour
  peak_end_hour = OpenStudio::Measure::OSArgument.makeDoubleArgument('peak_end_hour', true)
  peak_end_hour.setDisplayName('Hour Peak Ends')
  peak_end_hour.setDescription('1-24')
  peak_end_hour.setDefaultValue(18)
  peak_end_hour.setMinValue(0.0)
  peak_end_hour.setMaxValue(24.0)
  args << peak_end_hour

  # adding argument for elec_rate_sum_peak
  elec_rate_sum_peak = OpenStudio::Measure::OSArgument.makeDoubleArgument('elec_rate_sum_peak', true)
  elec_rate_sum_peak.setDisplayName('Electric Rate Summer On-Peak')
  elec_rate_sum_peak.setUnits('$/kWh')
  elec_rate_sum_peak.setDefaultValue(0.06)
  args << elec_rate_sum_peak

  # adding argument for elec_rate_sum_nonpeak
  elec_rate_sum_nonpeak = OpenStudio::Measure::OSArgument.makeDoubleArgument('elec_rate_sum_nonpeak', true)
  elec_rate_sum_nonpeak.setDisplayName('Electric Rate Summer Off-Peak')
  elec_rate_sum_nonpeak.setUnits('$/kWh')
  elec_rate_sum_nonpeak.setDefaultValue(0.04)
  args << elec_rate_sum_nonpeak

  # adding argument for elec_rate_nonsum_peak
  elec_rate_nonsum_peak = OpenStudio::Measure::OSArgument.makeDoubleArgument('elec_rate_nonsum_peak', true)
  elec_rate_nonsum_peak.setDisplayName('Electric Rate Not Summer On-Peak')
  elec_rate_nonsum_peak.setUnits('$/kWh')
  elec_rate_nonsum_peak.setDefaultValue(0.05)
  args << elec_rate_nonsum_peak

  # adding argument for elec_rate_nonsum_nonpeak
  elec_rate_nonsum_nonpeak = OpenStudio::Measure::OSArgument.makeDoubleArgument('elec_rate_nonsum_nonpeak', true)
  elec_rate_nonsum_nonpeak.setDisplayName('Electric Rate Not Summer Off-Peak')
  elec_rate_nonsum_nonpeak.setUnits('$/kWh')
  elec_rate_nonsum_nonpeak.setDefaultValue(0.03)
  args << elec_rate_nonsum_nonpeak

  # adding argument for elec_demand_sum
  elec_demand_sum = OpenStudio::Measure::OSArgument.makeDoubleArgument('elec_demand_sum', true)
  elec_demand_sum.setDisplayName('Electric Peak Demand Charge Summer')
  elec_demand_sum.setUnits('$/kW')
  elec_demand_sum.setDefaultValue(15.0)
  args << elec_demand_sum

  # adding argument for elec_demand_nonsum
  elec_demand_nonsum = OpenStudio::Measure::OSArgument.makeDoubleArgument('elec_demand_nonsum', true)
  elec_demand_nonsum.setDisplayName('Electric Peak Demand Charge Not Summer')
  elec_demand_nonsum.setUnits('$/kW')
  elec_demand_nonsum.setDefaultValue(10.0)
  args << elec_demand_nonsum

  # adding argument for gas_rate
  gas_rate = OpenStudio::Measure::OSArgument.makeDoubleArgument('gas_rate', true)
  gas_rate.setDisplayName('Gas Rate')
  gas_rate.setUnits('$/therm')
  gas_rate.setDefaultValue(0.5)
  args << gas_rate

  # adding argument for water_rate
  water_rate = OpenStudio::Measure::OSArgument.makeDoubleArgument('water_rate', true)
  water_rate.setDisplayName('Water Rate')
  water_rate.setUnits('$/gal')
  water_rate.setDefaultValue(0.005)
  args << water_rate

  # adding argument for disthtg_rate
  disthtg_rate = OpenStudio::Measure::OSArgument.makeDoubleArgument('disthtg_rate', true)
  disthtg_rate.setDisplayName('District Heating Rate')
  disthtg_rate.setUnits('$/therm')
  disthtg_rate.setDefaultValue(0.2)
  args << disthtg_rate

  # adding argument for distclg_rate
  distclg_rate = OpenStudio::Measure::OSArgument.makeDoubleArgument('distclg_rate', true)
  distclg_rate.setDisplayName('District Cooling Rate')
  distclg_rate.setUnits('$/therm')
  distclg_rate.setDefaultValue(0.2)
  args << distclg_rate

  return args
end

#description ⇒ Object

human readable description



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# File 'lib/measures/tariff_selection_time_and_date_dependant/measure.rb', line 17

def description
  return 'This measure sets flat rates for gas, water, district heating, and district cooling but has on seasonal and off peak rates for electricity. It exposes inputs for the time of day and day of year where peak rates should be applied.'
end

#modeler_description ⇒ Object

human readable description of modeling approach



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# File 'lib/measures/tariff_selection_time_and_date_dependant/measure.rb', line 22

def modeler_description
  return 'Will add the necessary UtilityCost objects and associated schedule into the model.'
end

#name ⇒ Object

human readable name



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# File 'lib/measures/tariff_selection_time_and_date_dependant/measure.rb', line 12

def name
  return 'Tariff Selection-Time and Date Dependant'
end

#run(workspace, runner, user_arguments) ⇒ Object

define what happens when the measure is run



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# File 'lib/measures/tariff_selection_time_and_date_dependant/measure.rb', line 171

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

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

  # assign the user inputs to variables
  args = runner.getArgumentValues(arguments(workspace), user_arguments)
  args = Hash[args.collect{ |k, v| [k.to_s, v] }]
  if !args then return false end

  # reporting initial condition of model
  starting_tariffs = workspace.getObjectsByType('UtilityCost:Tariff'.to_IddObjectType)
  runner.registerInitialCondition("The model started with #{starting_tariffs.size} tariff objects.")

  # map demand window length to integer
  demand_window_per_hour = nil
  if args['demand_window_length'] == 'QuarterHour'
    demand_window_per_hour = 4
  elsif args['demand_window_length'] == 'HalfHour'
    demand_window_per_hour = 2
  elsif args['demand_window_length'] == 'FullHour'
    demand_window_per_hour = 1
  end

  # make sure demand window length is is divisible by timestep
  if !workspace.getObjectsByType('Timestep'.to_IddObjectType).empty?
    initial_timestep = workspace.getObjectsByType('Timestep'.to_IddObjectType)[0].getString(0).get

    if initial_timestep.to_f / demand_window_per_hour.to_f == (initial_timestep.to_f / demand_window_per_hour.to_f).truncate # checks if remainder of divided numbers is > 0
      runner.registerInfo("The demand window length of a #{args['demand_window_length']} is compatible with the current setting of #{initial_timestep} timesteps per hour.")
    else
      workspace.getObjectsByType('Timestep'.to_IddObjectType)[0].setString(0, demand_window_per_hour.to_s)
      runner.registerInfo("Updating the timesteps per hour in the model from #{initial_timestep} to #{demand_window_per_hour} to be compatible with the demand window length of a #{args['demand_window_length']}")
    end
  else

    # add a timestep object to the workspace
    new_object_string = "
    Timestep,
      4;                                      !- Number of Timesteps per Hour
      "
    idfObject = OpenStudio::IdfObject.load(new_object_string)
    object = idfObject.get
    wsObject = workspace.addObject(object)
    new_object = wsObject.get
    runner.registerInfo('No timestep object found. Added a new timestep object set to 4 timesteps per hour')
  end

  # get variables for time of day and year
  ms = args['summer_start_month']
  ds = args['summer_start_day']
  mf = args['summer_end_month']
  df = args['summer_end_day']
  ps = args['peak_start_hour']
  pf = args['peak_end_hour']
  psh = ps.truncate
  pfh = pf.truncate
  psm = ((ps - ps.truncate) * 60).truncate
  pfm = ((pf - pf.truncate) * 60).truncate

  if args['elec_rate_sum_peak'].abs + args['elec_rate_sum_nonpeak'].abs + args['elec_rate_nonsum_peak'].abs + args['elec_rate_nonsum_nonpeak'].abs + args['elec_demand_sum'].abs + args['elec_demand_nonsum'].abs > 0

    # make type limits object
    new_object_string = "
    ScheduleTypeLimits,
      number, !- Name
      0,                                      !- Lower Limit Value {BasedOnField A3}
      4,                                      !- Upper Limit Value {BasedOnField A3}
      DISCRETE;                               !- Numeric Type
      "
    type_limits = workspace.addObject(OpenStudio::IdfObject.load(new_object_string).get).get

    # make two season schedule
    if ms + ds / 100.0 < mf + ds / 100.0
      new_object_string = "
    Schedule:Compact,
      TwoSeasonSchedule,                      !- Name
      number,                                 !- Schedule Type Limits Name
      Through: #{ms}/#{ds},                   !- Field 1
      For: AllDays,                           !- Field 2
      Until: 24:00,                           !- Field 3
      1,                                      !- Field 4
      Through: #{mf}/#{df},                   !- Field 5
      For: AllDays,                           !- Field 6
      Until: 24:00,                           !- Field 7
      3,                                      !- Field 8
      Through: 12/31,                         !- Field 9
      For: AllDays,                           !- Field 10
      Until: 24:00,                           !- Field 11
      1;
      "
    else
      new_object_string = "
    Schedule:Compact,
      TwoSeasonSchedule,                      !- Name
      number,                                 !- Schedule Type Limits Name
      Through: #{mf}/#{df},                   !- Field 1
      For: AllDays,                           !- Field 2
      Until: 24:00,                           !- Field 3
      3,                                      !- Field 4
      Through: #{ms}/#{ds},                   !- Field 5
      For: AllDays,                           !- Field 6
      Until: 24:00,                           !- Field 7
      1,                                      !- Field 8
      Through: 12/31,                         !- Field 9
      For: AllDays,                           !- Field 10
      Until: 24:00,                           !- Field 11
      3;
      "
    end
    two_season_schedule = workspace.addObject(OpenStudio::IdfObject.load(new_object_string).get).get

    # make time of day schedule
    if psh + psm / 100.0 < pfh + pfm / 100.0
      new_object_string = "
      Schedule:Compact,
        TimeOfDaySchedule,                      !- Name
        number,                                 !- Schedule Type Limits Name
        Through: 12/31,                         !- Field 1
        For: AllDays,                           !- Field 2
        Until: #{psh}:#{psm},                   !- Field 3
        3,                                      !- Field 4
        Until: #{pfh}:#{pfm},                   !- Field 5
        1,                                      !- Field 6
        Until: 24:00,                           !- Field 7
        3;                                      !- Field 8
      "
    else
      new_object_string = "
      Schedule:Compact,
        TimeOfDaySchedule,                      !- Name
        number,                                 !- Schedule Type Limits Name
        Through: 12/31,                         !- Field 1
        For: AllDays,                           !- Field 2
        Until: #{pfh}:#{pfm},                   !- Field 3
        1,                                      !- Field 4
        Until: #{psh}:#{psm},                   !- Field 5
        3,                                      !- Field 6
        Until: 24:00,                           !- Field 7
        1;                                      !- Field 8
      "
    end
    time_of_day_schedule = workspace.addObject(OpenStudio::IdfObject.load(new_object_string).get).get

    # electric tariff object
    new_object_string = "
    UtilityCost:Tariff,
      Electricity Tariff,                     !- Name
      ElectricityPurchased:Facility,          !- Output Meter Name
      kWh,                                    !- Conversion Factor Choice
      ,                                       !- Energy Conversion Factor
      ,                                       !- Demand Conversion Factor
      #{time_of_day_schedule.getString(0)},   !- Time of Use Period Schedule Name
      #{two_season_schedule.getString(0)},    !- Season Schedule Name
      ,                                       !- Month Schedule Name
      #{args['demand_window_length']},        !- Demand Window Length
      0.0;                                    !- Monthly Charge or Variable Name
      "
    electric_tariff = workspace.addObject(OpenStudio::IdfObject.load(new_object_string).get).get

    # make UtilityCost:Charge:Simple objects for electricity
    new_object_string = "
    UtilityCost:Charge:Simple,
      ElectricityTariffSummerOnPeakEnergyCharge, !- Name
      Electricity Tariff,                      !- Tariff Name
      peakEnergy,                             !- Source Variable
      summer,                                 !- Season
      EnergyCharges,                          !- Category Variable Name
      #{args['elec_rate_sum_peak']};          !- Cost per Unit Value or Variable Name
      "
    elec_utility_cost_sum_peak = workspace.addObject(OpenStudio::IdfObject.load(new_object_string).get).get

    new_object_string = "
    UtilityCost:Charge:Simple,
      ElectricityTariffSummerOffPeakEnergyCharge, !- Name
      Electricity Tariff,                      !- Tariff Name
      offPeakEnergy,                          !- Source Variable
      summer,                                 !- Season
      EnergyCharges,                          !- Category Variable Name
      #{args['elec_rate_sum_nonpeak']};          !- Cost per Unit Value or Variable Name
      "
    elec_utility_cost_sum_nonpeak = workspace.addObject(OpenStudio::IdfObject.load(new_object_string).get).get

    new_object_string = "
    UtilityCost:Charge:Simple,
      ElectricityTariffWinterOnPeakEnergyCharge, !- Name
      Electricity Tariff,                      !- Tariff Name
      peakEnergy,                             !- Source Variable
      winter,                                 !- Season
      EnergyCharges,                          !- Category Variable Name
      #{args['elec_rate_nonsum_peak']};          !- Cost per Unit Value or Variable Name
      "
    elec_utility_cost_nonsum_peak = workspace.addObject(OpenStudio::IdfObject.load(new_object_string).get).get

    new_object_string = "
    UtilityCost:Charge:Simple,
      ElectricityTariffWinterOffPeakEnergyCharge, !- Name
      Electricity Tariff,                      !- Tariff Name
      offPeakEnergy,                          !- Source Variable
      winter,                                 !- Season
      EnergyCharges,                          !- Category Variable Name
      #{args['elec_rate_nonsum_nonpeak']};          !- Cost per Unit Value or Variable Name
      "
    elec_utility_cost_nonsum_nonpeak = workspace.addObject(OpenStudio::IdfObject.load(new_object_string).get).get

    new_object_string = "
    UtilityCost:Charge:Simple,
      ElectricityTariffSummerDemandCharge, !- Name
      Electricity Tariff,                      !- Tariff Name
      totalDemand,                            !- Source Variable
      summer,                                 !- Season
      DemandCharges,                          !- Category Variable Name
      #{args['elec_demand_sum']};          !- Cost per Unit Value or Variable Name
      "
    elec_utility_cost_sum_demand = workspace.addObject(OpenStudio::IdfObject.load(new_object_string).get).get

    new_object_string = "
    UtilityCost:Charge:Simple,
      ElectricityTariffWinterDemandCharge, !- Name
      Electricity Tariff,                      !- Tariff Name
      totalDemand,                            !- Source Variable
      winter,                                 !- Season
      DemandCharges,                          !- Category Variable Name
      #{args['elec_demand_nonsum']};          !- Cost per Unit Value or Variable Name
      "
    elec_utility_cost_nonsum_demand = workspace.addObject(OpenStudio::IdfObject.load(new_object_string).get).get
  end

  # gas tariff object
  if args['gas_rate'] > 0
    new_object_string = "
    UtilityCost:Tariff,
      Gas Tariff,                             !- Name
      NaturalGas:Facility,                    !- Output Meter Name
      Therm,                                  !- Conversion Factor Choice
      ,                                       !- Energy Conversion Factor
      ,                                       !- Demand Conversion Factor
      ,                                       !- Time of Use Period Schedule Name
      ,                                       !- Season Schedule Name
      ,                                       !- Month Schedule Name
      Day,                                    !- Demand Window Length
      0.0;                                    !- Monthly Charge or Variable Name
      "
    gas_tariff = workspace.addObject(OpenStudio::IdfObject.load(new_object_string).get).get

    # make UtilityCost:Charge:Simple objects for gas
    new_object_string = "
    UtilityCost:Charge:Simple,
      GasTariffEnergyCharge, !- Name
      Gas Tariff,                             !- Tariff Name
      totalEnergy,                            !- Source Variable
      Annual,                                 !- Season
      EnergyCharges,                          !- Category Variable Name
      #{args['gas_rate']};          !- Cost per Unit Value or Variable Name
      "
    gas_utility_cost = workspace.addObject(OpenStudio::IdfObject.load(new_object_string).get).get
  end

  # conversion for water tariff rate
  dollars_per_gallon = args['water_rate']
  dollars_per_meter_cubed = OpenStudio.convert(dollars_per_gallon, '1/gal', '1/m^3').get

  # water tariff object
  if args['water_rate'] > 0
    new_object_string = "
    UtilityCost:Tariff,
      Water Tariff,                             !- Name
      Water:Facility,             !- Output Meter Name
      UserDefined,                            !- Conversion Factor Choice
      1,                                       !- Energy Conversion Factor
      ,                                       !- Demand Conversion Factor
      ,                                       !- Time of Use Period Schedule Name
      ,                                       !- Season Schedule Name
      ,                                       !- Month Schedule Name
      ,                                       !- Demand Window Length
      0.0;                                    !- Monthly Charge or Variable Name
      "
    water_tariff = workspace.addObject(OpenStudio::IdfObject.load(new_object_string).get).get

    # make UtilityCost:Charge:Simple objects for water
    new_object_string = "
    UtilityCost:Charge:Simple,
      WaterTariffEnergyCharge, !- Name
      Water Tariff,                             !- Tariff Name
      totalEnergy,                             !- Source Variable
      Annual,                                 !- Season
      EnergyCharges,                          !- Category Variable Name
      #{dollars_per_meter_cubed};          !- Cost per Unit Value or Variable Name
      "
    water_utility_cost = workspace.addObject(OpenStudio::IdfObject.load(new_object_string).get).get
  end

  # disthtg tariff object
  if args['disthtg_rate'] > 0
    new_object_string = "
    UtilityCost:Tariff,
      DistrictHeating Tariff,                             !- Name
      DistrictHeating:Facility,                           !- Output Meter Name
      Therm,                                  !- Conversion Factor Choice
      ,                                       !- Energy Conversion Factor
      ,                                       !- Demand Conversion Factor
      ,                                       !- Time of Use Period Schedule Name
      ,                                       !- Season Schedule Name
      ,                                       !- Month Schedule Name
      Day,                                    !- Demand Window Length
      0.0;                                    !- Monthly Charge or Variable Name
      "
    disthtg_tariff = workspace.addObject(OpenStudio::IdfObject.load(new_object_string).get).get

    # make UtilityCost:Charge:Simple objects for disthtg
    new_object_string = "
    UtilityCost:Charge:Simple,
      DistrictHeatingTariffEnergyCharge, !- Name
      DistrictHeating Tariff,                             !- Tariff Name
      totalEnergy,                            !- Source Variable
      Annual,                                 !- Season
      EnergyCharges,                          !- Category Variable Name
      #{args['disthtg_rate']};          !- Cost per Unit Value or Variable Name
      "
    disthtg_utility_cost = workspace.addObject(OpenStudio::IdfObject.load(new_object_string).get).get
  end

  # distclg tariff object
  if args['distclg_rate'] > 0
    new_object_string = "
    UtilityCost:Tariff,
      DistrictCooling Tariff,                             !- Name
      DistrictCooling:Facility,                           !- Output Meter Name
      Therm,                                  !- Conversion Factor Choice
      ,                                       !- Energy Conversion Factor
      ,                                       !- Demand Conversion Factor
      ,                                       !- Time of Use Period Schedule Name
      ,                                       !- Season Schedule Name
      ,                                       !- Month Schedule Name
      Day,                                    !- Demand Window Length
      0.0;                                    !- Monthly Charge or Variable Name
      "
    distclg_tariff = workspace.addObject(OpenStudio::IdfObject.load(new_object_string).get).get

    # make UtilityCost:Charge:Simple objects for distclg
    new_object_string = "
    UtilityCost:Charge:Simple,
      DistrictCoolingTariffEnergyCharge, !- Name
      DistrictCooling Tariff,                             !- Tariff Name
      totalEnergy,                            !- Source Variable
      Annual,                                 !- Season
      EnergyCharges,                          !- Category Variable Name
      #{args['distclg_rate']};          !- Cost per Unit Value or Variable Name
    "
    distclg_utility_cost = workspace.addObject(OpenStudio::IdfObject.load(new_object_string).get).get
  end

  # report final condition of model
  finishing_tariffs = workspace.getObjectsByType('UtilityCost:Tariff'.to_IddObjectType)
  runner.registerFinalCondition("The model finished with #{finishing_tariffs.size} tariff objects.")

  return true
end