Steam systems

model/simulationtests/steam_systems.rb

@@ -0,0 +1,158 @@
+# frozen_string_literal: true
+
+require 'openstudio'
+require_relative 'lib/baseline_model'
+
+model = BaselineModel.new
+
+# make a 1 story, 100m X 50m, 10 zone core/perimeter building
+model.add_geometry({ 'length' => 100,
+                     'width' => 50,
+                     'num_floors' => 1,
+                     'floor_to_floor_height' => 4,
+                     'plenum_height' => 1,
+                     'perimeter_zone_depth' => 3 })
+
+# add windows at a 40% window-to-wall ratio
+model.add_windows({ 'wwr' => 0.4,
+                    'offset' => 1,
+                    'application_type' => 'Above Floor' })
+
+# add thermostats
+model.add_thermostats({ 'heating_setpoint' => 24,
+                        'cooling_setpoint' => 28 })
+
+# SteamSystemAutoSize_DistrictHeatingSteam.idf
+# - DistrictHeating:Steam
+# - Pump:VariableSpeed:Condensate
+# - AirTerminal:SingleDuct:VAV:Reheat
+# - Coil:Heating:Steam
+
+# 5ZoneSteamBaseboard.idf
+# - Boiler:Steam
+# - Pump:VariableSpeed:Condensate
+# - AirTerminal:SingleDuct:VAV:Reheat
+# - Coil:Heating:Steam
+# - ZoneHVAC:Baseboard:RadiantConvective:Steam
+
+# Add a steam plant to supply the baseboard heaters
+# This could be baked into HVAC templates in the future
+hotSteamPlant = OpenStudio::Model::PlantLoop.new(model)
+hotSteamPlant.setName('Hot Steam Plant')
+
+sizingPlant = hotSteamPlant.sizingPlant
+sizingPlant.setLoopType('Heating')
+sizingPlant.setDesignLoopExitTemperature(82.0)
+sizingPlant.setLoopDesignTemperatureDifference(11.0)
+
+steamOutletNode = hotSteamPlant.supplyOutletNode
+steamInletNode = hotSteamPlant.supplyInletNode
+
+pump = OpenStudio::Model::PumpVariableSpeedCondensate.new(model)
+pump.addToNode(steamInletNode)
+
+# Boiler steam
+boiler = OpenStudio::Model::BoilerSteam.new(model)
+node = hotSteamPlant.supplySplitter.lastOutletModelObject.get.to_Node.get
+boiler.addToNode(node)
+
+# District heating steam
+district_heating_steam = OpenStudio::Model::DistrictHeatingSteam.new(model)
+district_heating_steam.addToNode(node)
+
+pipe = OpenStudio::Model::PipeAdiabatic.new(model)
+hotSteamPlant.addSupplyBranchForComponent(pipe)
+
+pipe2 = OpenStudio::Model::PipeAdiabatic.new(model)
+pipe2.addToNode(steamOutletNode)
+
+## Make a steam temperature schedule
+
+osTime = OpenStudio::Time.new(0, 24, 0, 0)
+
+steamTempSchedule = OpenStudio::Model::ScheduleRuleset.new(model)
+steamTempSchedule.setName('Steam Temperature')
+
+### Winter Design Day
+steamTempScheduleWinter = OpenStudio::Model::ScheduleDay.new(model)
+steamTempSchedule.setWinterDesignDaySchedule(steamTempScheduleWinter)
+steamTempSchedule.winterDesignDaySchedule.setName('Steam Temperature Winter Design Day')
+steamTempSchedule.winterDesignDaySchedule.addValue(osTime, 67)
+
+### Summer Design Day
+steamTempScheduleSummer = OpenStudio::Model::ScheduleDay.new(model)
+steamTempSchedule.setSummerDesignDaySchedule(steamTempScheduleSummer)
+steamTempSchedule.summerDesignDaySchedule.setName('Steam Temperature Summer Design Day')
+steamTempSchedule.summerDesignDaySchedule.addValue(osTime, 67)
+
+### All other days
+steamTempSchedule.defaultDaySchedule.setName('Steam Temperature Default')
+steamTempSchedule.defaultDaySchedule.addValue(osTime, 67)
+
+steamSPM = OpenStudio::Model::SetpointManagerScheduled.new(model, steamTempSchedule)
+steamSPM.addToNode(steamOutletNode)
+
+# assign constructions from a local library to the walls/windows/etc. in the model
+model.set_constructions
+
+# set whole building space type; simplified 90.1-2004 Large Office Whole Building
+model.set_space_type
+
+# add design days to the model (Chicago)
+model.add_design_days
+
+# assign thermal zones to variables
+story_1_core_thermal_zone = model.getThermalZoneByName('Story 1 Core Thermal Zone').get
+story_1_north_thermal_zone = model.getThermalZoneByName('Story 1 North Perimeter Thermal Zone').get
+story_1_south_thermal_zone = model.getThermalZoneByName('Story 1 South Perimeter Thermal Zone').get
+story_1_east_thermal_zone = model.getThermalZoneByName('Story 1 East Perimeter Thermal Zone').get
+story_1_west_thermal_zone = model.getThermalZoneByName('Story 1 West Perimeter Thermal Zone').get
+
+# new airloop
+airLoopHVAC = OpenStudio::Model::AirLoopHVAC.new(model)
+
+# OA controller
+controllerOutdoorAir = OpenStudio::Model::ControllerOutdoorAir.new(model)
+outdoorAirSystem = OpenStudio::Model::AirLoopHVACOutdoorAirSystem.new(model, controllerOutdoorAir)
+
+# add the equipment to the airloop
+supplyOutletNode = airLoopHVAC.supplyOutletNode
+outdoorAirSystem.addToNode(supplyOutletNode)
+
+# Make a time stamp to use in multiple places
+os_time = OpenStudio::Time.new(0, 24, 0, 0)
+
+# always On Schedule
+# Schedule Ruleset
+always_on_sch = OpenStudio::Model::ScheduleRuleset.new(model)
+always_on_sch.setName('Always_On')
+# Winter Design Day
+always_on_sch_winter = OpenStudio::Model::ScheduleDay.new(model)
+always_on_sch.setWinterDesignDaySchedule(always_on_sch_winter)
+always_on_sch.winterDesignDaySchedule.setName('Always_On_Winter_Design_Day')
+always_on_sch.winterDesignDaySchedule.addValue(os_time, 1)
+# Summer Design Day
+always_on_sch_summer = OpenStudio::Model::ScheduleDay.new(model)
+always_on_sch.setSummerDesignDaySchedule(always_on_sch_summer)
+always_on_sch.summerDesignDaySchedule.setName('Always_On_Summer_Design_Day')
+always_on_sch.summerDesignDaySchedule.addValue(os_time, 1)
+# All other days
+always_on_sch.defaultDaySchedule.setName('Always_On_Default')
+always_on_sch.defaultDaySchedule.addValue(os_time, 1)
+
+# Add ZoneHVACBaseboardRadiantConvectiveSteam
+zoneHVACBaseboardRadiantConvectiveSteam = OpenStudio::Model::ZoneHVACBaseboardRadiantConvectiveSteam.new(model)
+baseboard_coil = zoneHVACBaseboardRadiantConvectiveSteam.heatingCoil
+hotSteamPlant.addDemandBranchForComponent(baseboard_coil)
+zoneHVACBaseboardRadiantConvectiveSteam.addToThermalZone(story_1_core_thermal_zone)
+
+# Add CoilHeatingSteam
+steamReheatCoil = OpenStudio::Model::CoilHeatingSteam.new(model, always_on_sch)
+steamTerminal = OpenStudio::Model::AirTerminalSingleDuctVAVReheat.new(model, always_on_sch, steamReheatCoil)
+airLoopHVAC.addBranchForHVACComponent(steamTerminal)
+hotSteamPlant.addDemandBranchForComponent(steamReheatCoil)
+airLoopHVAC.addBranchForZone(story_1_north_thermal_zone)
+
+# save the OpenStudio model (.osm)
+model.save_openstudio_osm({ 'osm_save_directory' => Dir.pwd,
+                            'osm_name' => 'in.osm' })

model_tests.rb

@@ -2251,6 +2251,19 @@ def test_zone_hvac2_osm
     result = sim_test('zone_hvac2.osm')
   end
 
+  def test_steam_systems_rb
+    result = sim_test('steam_systems.rb')
+  end
+
+  # def test_steam_systems_py
+  # result = sim_test('steam_systems.py')
+  # end
+
+  # TODO: To be added in the next official release after: 3.10.0
+  # def test_steam_systems_osm
+  # result = sim_test('steam_systems.osm')
+  # end
+
   def test_zone_hvac_cooling_panel_rb
     result = sim_test('zone_hvac_cooling_panel.rb')
   end