availability_managers.rb

require 'openstudio'
require 'lib/baseline_model'

model = BaselineModel.new

#make a 2 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 ASHRAE System type 03, PSZ-AC
model.add_hvac({"ashrae_sys_num" => '03'})

schedule = OpenStudio::Model::ScheduleRuleset.new(model)
day_schedule = schedule.defaultDaySchedule();
day_schedule.addValue(OpenStudio::Time.new(0,6,0,0),0.0)
day_schedule.addValue(OpenStudio::Time.new(0,22,0,0),1.0)
day_schedule.addValue(OpenStudio::Time.new(0,24,0,0),0.0)

# In order to produce consistent results, because zones and systems may not
# be in the same order in the resulting OSM on subsequent runs,
# We sort the AirLoopHVAC by the (unique in each AirLoopHVAC) thermal zone names
# We'll ensure we assign the same AVMs to the same Zone!
systems = model.getAirLoopHVACs.sort_by{|a| a.thermalZones[0].name.to_s}
systems.each_with_index do |system,i|
  system.setAvailabilitySchedule(schedule)
  if i == 0
    avm = OpenStudio::Model::AvailabilityManagerNightVentilation.new(model)
    ventilationTemperatureSchedule = OpenStudio::Model::ScheduleRuleset.new(model)
    ventilationTemperatureSchedule.defaultDaySchedule().addValue(OpenStudio::Time.new(0,24,0,0),18.0);
    avm.setVentilationTemperatureSchedule(ventilationTemperatureSchedule);
    system.setAvailabilityManager(avm)

  elsif i == 1
    avm = OpenStudio::Model::AvailabilityManagerOptimumStart.new(model)
    system.setAvailabilityManager(avm)

  elsif i == 2
    avm = OpenStudio::Model::AvailabilityManagerHybridVentilation.new(model)
    system.setAvailabilityManager(avm)

  elsif i == 3
    system.setNightCycleControlType("CycleOnAny");
  end
end


# Swap the coils so that the heating coil is before the DX to avoid frost
# conditions on the DX cooling coil
=begin
     nmodel.getAirLoopHVACs.each do |a|
     n  hc = a.supplyComponents("OS_Coil_Heating_Gas".to_IddObjectType)[0].to_CoilHeatingGas.get
     n  m_node = a.mixedAirNode.get
     n  hc.addToNode(m_node)
     nend
=end

#add thermostats
model.add_thermostats({"heating_setpoint" => 24,
                      "cooling_setpoint" => 28})

#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()

#save the OpenStudio model (.osm)
model.save_openstudio_osm({"osm_save_directory" => Dir.pwd,
                           "osm_name" => "in.osm"})