Module: Hospital

Defined in:
lib/openstudio-standards/prototypes/common/buildings/Prototype.Hospital.rb

Overview

Custom changes for the Hospital prototype. These are changes that are inconsistent with other prototype building types.

AirTerminalSingleDuctVAVReheat collapse

Instance Method Summary collapse

Instance Method Details

#add_extra_equip_kitchen(model) ⇒ Boolean

add extra equipment for kitchen

Parameters:

  • model (OpenStudio::Model::Model) —

    OpenStudio model object

Returns:

  • (Boolean) —

    returns true if successful, false if not



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# File 'lib/openstudio-standards/prototypes/common/buildings/Prototype.Hospital.rb', line 137

def add_extra_equip_kitchen(model)
  kitchen_space = model.getSpaceByName('Kitchen_Flr_5')
  kitchen_space = kitchen_space.get
  kitchen_space_type = kitchen_space.spaceType.get
  elec_equip_def1 = OpenStudio::Model::ElectricEquipmentDefinition.new(model)
  elec_equip_def2 = OpenStudio::Model::ElectricEquipmentDefinition.new(model)
  elec_equip_def1.setName('Kitchen Electric Equipment Definition1')
  elec_equip_def2.setName('Kitchen Electric Equipment Definition2')
  case template
    when '90.1-2004', '90.1-2007', '90.1-2010', '90.1-2013', '90.1-2016', '90.1-2019'
      elec_equip_def1.setFractionLatent(0)
      elec_equip_def1.setFractionRadiant(0.25)
      elec_equip_def1.setFractionLost(0)
      elec_equip_def2.setFractionLatent(0)
      elec_equip_def2.setFractionRadiant(0.25)
      elec_equip_def2.setFractionLost(0)
      if template == '90.1-2013' || template == '90.1-2016'
        elec_equip_def1.setDesignLevel(915)
        elec_equip_def2.setDesignLevel(855)
      elsif template == '90.1-2019'
        elec_equip_def1.setDesignLevel(555)
        elec_equip_def2.setDesignLevel(470)
      else
        elec_equip_def1.setDesignLevel(1031.8)
        elec_equip_def2.setDesignLevel(1277.5)
      end
      # Create the electric equipment instance and hook it up to the space type
      elec_equip1 = OpenStudio::Model::ElectricEquipment.new(elec_equip_def1)
      elec_equip2 = OpenStudio::Model::ElectricEquipment.new(elec_equip_def2)
      elec_equip1.setName('Kitchen_Reach-in-Freezer')
      elec_equip2.setName('Kitchen_Reach-in-Refrigerator')
      elec_equip1.setSpaceType(kitchen_space_type)
      elec_equip2.setSpaceType(kitchen_space_type)
      elec_equip1.setSchedule(model_add_schedule(model, 'Hospital ALWAYS_ON'))
      elec_equip2.setSchedule(model_add_schedule(model, 'Hospital ALWAYS_ON'))
  end
  return true
end

#add_humidifier(space_name, hot_water_loop, model) ⇒ Boolean

add humidifier

Parameters:

  • space_name (String) —

    space name

  • hot_water_loop (OpenStudio::Model::PlantLoop) —

    hot water loop

  • model (OpenStudio::Model::Model) —

    OpenStudio model object

Returns:

  • (Boolean) —

    returns true if successful, false if not



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# File 'lib/openstudio-standards/prototypes/common/buildings/Prototype.Hospital.rb', line 252

def add_humidifier(space_name, hot_water_loop, model)
  space = model.getSpaceByName(space_name).get
  zone = space.thermalZone.get
  humidistat = OpenStudio::Model::ZoneControlHumidistat.new(model)
  humidistat.setHumidifyingRelativeHumiditySetpointSchedule(model_add_schedule(model, 'Hospital MinRelHumSetSch'))
  humidistat.setDehumidifyingRelativeHumiditySetpointSchedule(model_add_schedule(model, 'Hospital MaxRelHumSetSch'))
  zone.setZoneControlHumidistat(humidistat)

  model.getAirLoopHVACs.sort.each do |air_loop|
    if air_loop.thermalZones.include? zone
      humidifier = OpenStudio::Model::HumidifierSteamElectric.new(model)
      humidifier.setRatedCapacity(3.72E-5)
      humidifier.setRatedPower(100_000)
      humidifier.setName("#{air_loop.name.get} Electric Steam Humidifier")
      # get the water heating coil and add humidifier to the outlet of heating coil (right before fan)
      htg_coil = nil
      air_loop.supplyComponents.each do |equip|
        if equip.to_CoilHeatingWater.is_initialized
          htg_coil = equip.to_CoilHeatingWater.get
        end
      end
      heating_coil_outlet_node = htg_coil.airOutletModelObject.get.to_Node.get
      supply_outlet_node = air_loop.supplyOutletNode
      humidifier.addToNode(heating_coil_outlet_node)
      humidity_spm = OpenStudio::Model::SetpointManagerSingleZoneHumidityMinimum.new(model)
      case template
      when '90.1-2004', '90.1-2007', '90.1-2010', '90.1-2013', '90.1-2016', '90.1-2019'
        create_coil_heating_electric(model,
                                     air_loop_node: supply_outlet_node,
                                     name: "#{space_name} Electric Htg Coil")
        create_coil_heating_water(model,
                                  hot_water_loop,
                                  air_loop_node: supply_outlet_node,
                                  name: "#{space_name} Water Htg Coil")
      end
      # humidity_spm.addToNode(supply_outlet_node)
      humidity_spm.addToNode(humidifier.outletModelObject.get.to_Node.get)
      humidity_spm.setControlZone(zone)
    end
  end
  return true
end

#air_loop_hvac_supply_air_temperature_reset_type(air_loop_hvac) ⇒ String

Type of SAT reset for this building type

Parameters:

  • air_loop_hvac (OpenStudio::Model::AirLoopHVAC) —

    air loop

Returns:

  • (String) —

    Returns type of SAT reset



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# File 'lib/openstudio-standards/prototypes/common/buildings/Prototype.Hospital.rb', line 420

def air_loop_hvac_supply_air_temperature_reset_type(air_loop_hvac)
  return 'oa'
end

#air_terminal_single_duct_vav_reheat_apply_initial_prototype_damper_position(air_terminal_single_duct_vav_reheat, zone_oa_per_area) ⇒ Boolean

Set the initial minimum damper position based on OA rate of the space and the template. Zones with low OA per area get lower initial guesses. Final position will be adjusted upward as necessary by Standards.AirLoopHVAC.apply_minimum_vav_damper_positions

Parameters:

  • air_terminal_single_duct_vav_reheat (OpenStudio::Model::AirTerminalSingleDuctVAVReheat) —

    the air terminal object

  • zone_oa_per_area (Double) —

    the zone outdoor air per area in m^3/s*m^2

Returns:

  • (Boolean) —

    returns true if successful, false if not



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# File 'lib/openstudio-standards/prototypes/common/buildings/Prototype.Hospital.rb', line 407

def air_terminal_single_duct_vav_reheat_apply_initial_prototype_damper_position(air_terminal_single_duct_vav_reheat, zone_oa_per_area)
  min_damper_position = template == '90.1-2010' || template == '90.1-2013' || template == '90.1-2016' || template == '90.1-2019' ? 0.2 : 0.3

  # Set the minimum flow fraction
  air_terminal_single_duct_vav_reheat.setConstantMinimumAirFlowFraction(min_damper_position)

  return true
end

#model_add_daylighting_controls(model) ⇒ Boolean

add daylighting controls

Parameters:

  • model (OpenStudio::Model::Model) —

    OpenStudio model object

Returns:

  • (Boolean) —

    returns true if successful, false if not



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# File 'lib/openstudio-standards/prototypes/common/buildings/Prototype.Hospital.rb', line 299

def model_add_daylighting_controls(model)
  space_names = ['Office1_Flr_5', 'Office3_Flr_5', 'Lobby_Records_Flr_1']
  space_names.each do |space_name|
    space = model.getSpaceByName(space_name).get
    space_add_daylighting_controls(space, false, false)
  end
  return true
end

#model_adjust_vav_minimum_damper(model) ⇒ Boolean

For operating room 1&2 in 2010 and 2013, VAV minimum air flow is set by schedule

Parameters:

  • model (OpenStudio::Model::Model) —

    OpenStudio model object

Returns:

  • (Boolean) —

    returns true if successful, false if not



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# File 'lib/openstudio-standards/prototypes/common/buildings/Prototype.Hospital.rb', line 312

def model_adjust_vav_minimum_damper(model)
  model.getThermalZones.each do |zone|
    air_terminal = zone.airLoopHVACTerminal
    if air_terminal.is_initialized
      air_terminal = air_terminal.get
      if air_terminal.to_AirTerminalSingleDuctVAVReheat.is_initialized
        air_terminal = air_terminal.to_AirTerminalSingleDuctVAVReheat.get
        vav_name = air_terminal.name.get
        # High OA zones
        # Determine whether or not to use the high minimum guess.
        # Cutoff was determined by correlating apparent minimum guesses
        # to OA rates in prototypes since not well documented in papers.
        zone_oa_per_area = OpenstudioStandards::ThermalZone.thermal_zone_get_outdoor_airflow_rate_per_area(zone)
        airlp = air_terminal.airLoopHVAC.get
        case template
        when 'DOE Ref Pre-1980', 'DOE Ref 1980-2004'
          if vav_name.include?('PatRoom') || vav_name.include?('OR') || vav_name.include?('ICU') || vav_name.include?('Lab') || vav_name.include?('ER') || vav_name.include?('Kitchen')
            air_terminal.setConstantMinimumAirFlowFraction(1.0)
          end
        # Minimum damper position for Outpatient prototype
        # Based on AIA 2001 ventilation requirements
        # See Section 5.2.2.16 in Thornton et al. 2010
        # https://www.energycodes.gov/sites/default/files/documents/BECP_Energy_Cost_Savings_STD2010_May2011_v00.pdf
        when '90.1-2004', '90.1-2007'
          air_terminal.setConstantMinimumAirFlowFraction(1.0) unless airlp.name.to_s.include?('VAV_1') || airlp.name.to_s.include?('VAV_2')
        when '90.1-2010', '90.1-2013', '90.1-2016', '90.1-2019'
          air_terminal.setConstantMinimumAirFlowFraction(1.0) unless airlp.name.to_s.include?('VAV_1') || airlp.name.to_s.include?('VAV_2')
          air_terminal.setConstantMinimumAirFlowFraction(0.5) if vav_name.include? 'PatRoom'
        end
      end
    end
  end
  return true
end

#model_custom_geometry_tweaks(model, building_type, climate_zone, prototype_input) ⇒ Boolean

geometry adjustments specific to the prototype model

Parameters:

  • model (OpenStudio::Model::Model) —

    OpenStudio model object

  • building_type (String) —

    the building type

  • climate_zone (String) —

    ASHRAE climate zone, e.g. ‘ASHRAE 169-2013-4A’

  • prototype_input (Hash) —

    hash of prototype inputs

Returns:

  • (Boolean) —

    returns true if successful, false if not



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# File 'lib/openstudio-standards/prototypes/common/buildings/Prototype.Hospital.rb', line 393

def model_custom_geometry_tweaks(model, building_type, climate_zone, prototype_input)
  # Set original building North axis
  OpenstudioStandards::Geometry.model_set_building_north_axis(model, 0.0)
  return true
end

#model_custom_hvac_tweaks(model, building_type, climate_zone, prototype_input) ⇒ Boolean

hvac adjustments specific to the prototype model

Parameters:

  • model (OpenStudio::Model::Model) —

    OpenStudio model object

  • building_type (String) —

    the building type

  • climate_zone (String) —

    ASHRAE climate zone, e.g. ‘ASHRAE 169-2013-4A’

  • prototype_input (Hash) —

    hash of prototype inputs

Returns:

  • (Boolean) —

    returns true if successful, false if not



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# File 'lib/openstudio-standards/prototypes/common/buildings/Prototype.Hospital.rb', line 11

def model_custom_hvac_tweaks(model, building_type, climate_zone, prototype_input)
  OpenStudio.logFree(OpenStudio::Info, 'openstudio.model.Model', 'Started building type specific HVAC adjustments')

  # add transformer
  # efficiency based on a 500 kVA transformer
  case template
  when '90.1-2004', '90.1-2007'
    transformer_efficiency = 0.979
  when '90.1-2010', '90.1-2013'
    transformer_efficiency = 0.987
  when '90.1-2016', '90.1-2019'
    transformer_efficiency = 0.991
  else
    transformer_efficiency = nil
  end

  unless transformer_efficiency.nil?
    model_add_transformer(model,
                          wired_lighting_frac: 0.022,
                          transformer_size: 500000,
                          transformer_efficiency: transformer_efficiency)
  end

  # add extra equipment for kitchen
  add_extra_equip_kitchen(model)

  system_to_space_map = define_hvac_system_map(building_type, climate_zone)

  hot_water_loop = nil
  model.getPlantLoops.sort.each do |loop|
    # If it has a boiler:hotwater, it is the correct loop
    unless loop.supplyComponents('OS:Boiler:HotWater'.to_IddObjectType).empty?
      hot_water_loop = loop
    end
  end
  if hot_water_loop
    case template
      when '90.1-2004', '90.1-2007', '90.1-2010', '90.1-2013', '90.1-2016', '90.1-2019'
        space_names = ['ER_Exam3_Mult4_Flr_1', 'OR2_Mult5_Flr_2', 'ICU_Flr_2', 'PatRoom5_Mult10_Flr_4', 'Lab_Flr_3']
        space_names.each do |space_name|
          add_humidifier(space_name, hot_water_loop, model)
        end
      when 'DOE Ref Pre-1980', 'DOE Ref 1980-2004'
        space_names = ['ER_Exam3_Mult4_Flr_1', 'OR2_Mult5_Flr_2']
        space_names.each do |space_name|
          add_humidifier(space_name, hot_water_loop, model)
        end
    end
  else
    OpenStudio.logFree(OpenStudio::Warn, 'openstudio.model.Model', 'Could not find hot water loop to attach humidifier to.')
  end

  # adjust minimum damper positions
  model_adjust_vav_minimum_damper(model)

  reset_kitchen_oa(model)
  model_update_exhaust_fan_efficiency(model)
  model_reset_or_room_vav_minimum_damper(prototype_input, model)

  # adjust CAV system sizing
  model.getAirLoopHVACs.each do |air_loop|
    if air_loop.name.to_s.include? 'CAV_KITCHEN'
      # system sizing
      sizing_system = air_loop.sizingSystem
      prehtg_sa_temp_c = OpenStudio.convert(55.04, 'F', 'C').get
      htg_sa_temp_c = OpenStudio.convert(104.0, 'F', 'C').get
      sizing_system.setPreheatDesignTemperature(prehtg_sa_temp_c)
      sizing_system.setCentralHeatingDesignSupplyAirTemperature(htg_sa_temp_c)
      sizing_system.setSizingOption('NonCoincident')

      # set coil sizing
      htg_coil = model.getCoilHeatingWaterByName('CAV_KITCHEN Main Htg Coil').get
      htg_coil.setRatedInletAirTemperature(prehtg_sa_temp_c)
      htg_coil.setRatedOutletAirTemperature(htg_sa_temp_c)

      # replace main supply air fan
      air_loop.supplyFan.get.remove
      fan = create_fan_by_name(model,
                               'Hospital_CAV_Sytem_Fan',
                               fan_name: "#{air_loop.name} Fan",
                               end_use_subcategory: 'CAV System Fans')
      fan.setAvailabilitySchedule(model.alwaysOnDiscreteSchedule)
      fan.addToNode(air_loop.supplyOutletNode)

      # replace AirTerminalSingleDuctVAVReheat with AirTerminalSingleDuctUncontrolled
      air_loop.thermalZones.each do |zone|
        # remove old terminal and reheat coil
        old_terminal = zone.airLoopHVACTerminal.get.to_AirTerminalSingleDuctVAVReheat.get
        reheat_coil = old_terminal.reheatCoil
        reheat_coil.remove
        # in future, may need to remove plant loop if empty at end of this
        old_terminal.remove
        air_loop.removeBranchForZone(zone)

        # make new terminal
        new_terminal = OpenStudio::Model::AirTerminalSingleDuctUncontrolled.new(model, model.alwaysOnDiscreteSchedule)
        new_terminal.setName("#{zone.name} CAV Terminal")
        air_loop.addBranchForZone(zone, new_terminal.to_StraightComponent)
        zone.setCoolingPriority(new_terminal.to_ModelObject.get, 1)
        zone.setHeatingPriority(new_terminal.to_ModelObject.get, 1)
      end

      # zone sizing
      zone_htg_sa_temp_c = OpenStudio.convert(104.0, 'F', 'C').get
      air_loop.thermalZones.each do |zone|
        sizing_zone = zone.sizingZone
        sizing_zone.setZoneHeatingDesignSupplyAirTemperature(zone_htg_sa_temp_c)
      end
    end
  end

  # Modify the condenser water pump
  if template == 'DOE Ref 1980-2004' || template == 'DOE Ref Pre-1980'
    cw_pump = model.getPumpConstantSpeedByName('Condenser Water Loop Constant Pump').get
    cw_pump_head_ft_h2o = 60.0
    cw_pump_head_press_pa = OpenStudio.convert(cw_pump_head_ft_h2o, 'ftH_{2}O', 'Pa').get
    cw_pump.setRatedPumpHead(cw_pump_head_press_pa)
  end

  return true
end

#model_custom_swh_tweaks(model, building_type, climate_zone, prototype_input) ⇒ Boolean

swh adjustments specific to the prototype model

Parameters:

  • model (OpenStudio::Model::Model) —

    OpenStudio model object

  • building_type (String) —

    the building type

  • climate_zone (String) —

    ASHRAE climate zone, e.g. ‘ASHRAE 169-2013-4A’

  • prototype_input (Hash) —

    hash of prototype inputs

Returns:

  • (Boolean) —

    returns true if successful, false if not



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# File 'lib/openstudio-standards/prototypes/common/buildings/Prototype.Hospital.rb', line 202

def model_custom_swh_tweaks(model, building_type, climate_zone, prototype_input)
  update_waterheater_ambient_parameters(model)

  return true
end

#model_modify_oa_controller(model) ⇒ Boolean

certain air handlers do not have an economizer

Parameters:

  • model (OpenStudio::Model::Model) —

    OpenStudio model object

Returns:

  • (Boolean) —

    returns true if successful, false if not



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# File 'lib/openstudio-standards/prototypes/common/buildings/Prototype.Hospital.rb', line 374

def model_modify_oa_controller(model)
  model.getAirLoopHVACs.sort.each do |air_loop|
    oa_sys = air_loop.airLoopHVACOutdoorAirSystem.get
    oa_control = oa_sys.getControllerOutdoorAir
    case air_loop.name.get
      when 'VAV_ER', 'VAV_ICU', 'VAV_LABS', 'VAV_OR', 'VAV_PATRMS', 'CAV_1', 'CAV_2'
        oa_control.setEconomizerControlType('NoEconomizer')
    end
  end
  return true
end

#model_reset_or_room_vav_minimum_damper(prototype_input, model) ⇒ Boolean

reset room vav damper minimums

Parameters:

  • prototype_input (Hash) —

    hash of prototype inputs

  • model (OpenStudio::Model::Model) —

    OpenStudio model object

Returns:

  • (Boolean) —

    returns true if successful, false if not



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# File 'lib/openstudio-standards/prototypes/common/buildings/Prototype.Hospital.rb', line 352

def model_reset_or_room_vav_minimum_damper(prototype_input, model)
  case template
  when '90.1-2010', '90.1-2013', '90.1-2016', '90.1-2019'
    model.getAirTerminalSingleDuctVAVReheats.sort.each do |air_terminal|
      air_terminal_name = air_terminal.name.get
      if air_terminal_name.include?('OR1') || air_terminal_name.include?('OR2') || air_terminal_name.include?('OR3') || air_terminal_name.include?('OR4')
        if model.version < OpenStudio::VersionString.new('3.0.1')
          air_terminal.setZoneMinimumAirFlowMethod('Scheduled')
        else
          air_terminal.setZoneMinimumAirFlowInputMethod('Scheduled')
        end
        air_terminal.setMinimumAirFlowFractionSchedule(model_add_schedule(model, 'Hospital OR_MinSA_Sched'))
      end
    end
  end
  return true
end

#model_update_exhaust_fan_efficiency(model) ⇒ Boolean

update exhuast fan efficiency

Parameters:

  • model (OpenStudio::Model::Model) —

    OpenStudio model object

Returns:

  • (Boolean) —

    returns true if successful, false if not



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# File 'lib/openstudio-standards/prototypes/common/buildings/Prototype.Hospital.rb', line 230

def model_update_exhaust_fan_efficiency(model)
  case template
    when '90.1-2004', '90.1-2007', '90.1-2010', '90.1-2013', '90.1-2016', '90.1-2019'
      model.getFanZoneExhausts.sort.each do |exhaust_fan|
        exhaust_fan.setFanEfficiency(0.16)
        exhaust_fan.setPressureRise(125)
      end
    when 'DOE Ref Pre-1980', 'DOE Ref 1980-2004'
      model.getFanZoneExhausts.sort.each do |exhaust_fan|
        exhaust_fan.setFanEfficiency(0.338)
        exhaust_fan.setPressureRise(125)
      end
  end
  return true
end

#reset_kitchen_oa(model) ⇒ Boolean

reset kitchen outdoor air

Parameters:

  • model (OpenStudio::Model::Model) —

    OpenStudio model object

Returns:

  • (Boolean) —

    returns true if successful, false if not



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# File 'lib/openstudio-standards/prototypes/common/buildings/Prototype.Hospital.rb', line 212

def reset_kitchen_oa(model)
  space_kitchen = model.getSpaceByName('Kitchen_Flr_5').get
  ventilation = space_kitchen.designSpecificationOutdoorAir.get
  ventilation.setOutdoorAirFlowperPerson(0)
  ventilation.setOutdoorAirFlowperFloorArea(0)
  case template
    when '90.1-2010', '90.1-2013', '90.1-2016', '90.1-2019'
      ventilation.setOutdoorAirFlowRate(3.398)
    when '90.1-2004', '90.1-2007', 'DOE Ref Pre-1980', 'DOE Ref 1980-2004'
      ventilation.setOutdoorAirFlowRate(3.776)
  end
  return true
end

#update_waterheater_ambient_parameters(model) ⇒ Boolean

update water heater ambient conditions

Parameters:

  • model (OpenStudio::Model::Model) —

    OpenStudio model object

Returns:

  • (Boolean) —

    returns true if successful, false if not



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# File 'lib/openstudio-standards/prototypes/common/buildings/Prototype.Hospital.rb', line 180

def update_waterheater_ambient_parameters(model)
  model.getWaterHeaterMixeds.sort.each do |water_heater|
    if water_heater.name.to_s.include?('300gal')
      water_heater.resetAmbientTemperatureSchedule
      water_heater.setAmbientTemperatureIndicator('ThermalZone')
      water_heater.setAmbientTemperatureThermalZone(model.getThermalZoneByName('Basement ZN').get)
    elsif water_heater.name.to_s.include?('6.0gal')
      water_heater.resetAmbientTemperatureSchedule
      water_heater.setAmbientTemperatureIndicator('ThermalZone')
      water_heater.setAmbientTemperatureThermalZone(model.getThermalZoneByName('Kitchen_Flr_5 ZN').get)
    end
  end
  return true
end