module Hospital

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

Public Instance Methods

add_extra_equip_kitchen(model) click to toggle source

add extra equipment for kitchen

@param model [OpenStudio::Model::Model] OpenStudio model object @return [Boolean] returns true if successful, false if not

# 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) click to toggle source

add humidifier

@param space_name [String] space name @param hot_water_loop [OpenStudio::Model::PlantLoop] hot water loop @param model [OpenStudio::Model::Model] OpenStudio model object @return [Boolean] returns true if successful, false if not

# 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) click to toggle source

Type of SAT reset for this building type

@param air_loop_hvac [OpenStudio::Model::AirLoopHVAC] air loop @return [String] Returns type of SAT reset

# 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) click to toggle source

@!group AirTerminalSingleDuctVAVReheat 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

@param air_terminal_single_duct_vav_reheat [OpenStudio::Model::AirTerminalSingleDuctVAVReheat] the air terminal object @param zone_oa_per_area [Double] the zone outdoor air per area in m^3/s*m^2 @return [Boolean] returns true if successful, false if not

# 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) click to toggle source

add daylighting controls

@param model [OpenStudio::Model::Model] OpenStudio model object @return [Boolean] returns true if successful, false if not

# 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) click to toggle source

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

@param model [OpenStudio::Model::Model] OpenStudio model object @return [Boolean] returns true if successful, false if not

# 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) click to toggle source

geometry adjustments specific to the prototype model

@param model [OpenStudio::Model::Model] OpenStudio model object @param building_type [String] the building type @param climate_zone [String] ASHRAE climate zone, e.g. ‘ASHRAE 169-2013-4A’ @param prototype_input [Hash] hash of prototype inputs @return [Boolean] returns true if successful, false if not

# 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) click to toggle source

hvac adjustments specific to the prototype model

@param model [OpenStudio::Model::Model] OpenStudio model object @param building_type [String] the building type @param climate_zone [String] ASHRAE climate zone, e.g. ‘ASHRAE 169-2013-4A’ @param prototype_input [Hash] hash of prototype inputs @return [Boolean] returns true if successful, false if not

# 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) click to toggle source

swh adjustments specific to the prototype model

@param model [OpenStudio::Model::Model] OpenStudio model object @param building_type [String] the building type @param climate_zone [String] ASHRAE climate zone, e.g. ‘ASHRAE 169-2013-4A’ @param prototype_input [Hash] hash of prototype inputs @return [Boolean] returns true if successful, false if not

# 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) click to toggle source

certain air handlers do not have an economizer

@param model [OpenStudio::Model::Model] OpenStudio model object @return [Boolean] returns true if successful, false if not

# 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) click to toggle source

reset room vav damper minimums

@param prototype_input [Hash] hash of prototype inputs @param model [OpenStudio::Model::Model] OpenStudio model object @return [Boolean] returns true if successful, false if not

# 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) click to toggle source

update exhuast fan efficiency

@param model [OpenStudio::Model::Model] OpenStudio model object @return [Boolean] returns true if successful, false if not

# 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) click to toggle source

reset kitchen outdoor air

@param model [OpenStudio::Model::Model] OpenStudio model object @return [Boolean] returns true if successful, false if not

# 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) click to toggle source

update water heater ambient conditions

@param model [OpenStudio::Model::Model] OpenStudio model object @return [Boolean] returns true if successful, false if not

# 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