expandable connector Bus "Control bus for air handler" extends Modelica.Icons.SignalBus; Buildings.Templates.Components.Interfaces.Bus fanSup "Supply fan points"; Buildings.Templates.Components.Interfaces.Bus fanRel "Relief fan points"; Buildings.Templates.Components.Interfaces.Bus fanRet "Return fan points"; Buildings.Templates.Components.Interfaces.Bus coiHea "Heating coil (preheat or reheat position, only one coil allowed) points"; Buildings.Templates.Components.Interfaces.Bus coiCoo "Cooling coil points"; Buildings.Templates.Components.Interfaces.Bus damOut "OA damper points"; Buildings.Templates.Components.Interfaces.Bus damOutMin "Minimum OA damper points"; Buildings.Templates.Components.Interfaces.Bus damRel "Relief damper points"; Buildings.Templates.Components.Interfaces.Bus damRet "Return damper points"; end Bus;

partial model PartialAirHandler "Interface class for air handler" inner replaceable package MediumAir=Buildings.Media.Air constrainedby Modelica.Media.Interfaces.PartialMedium "Air medium"; inner replaceable package MediumChiWat=Buildings.Media.Water constrainedby Modelica.Media.Interfaces.PartialMedium "CHW medium"; inner replaceable package MediumHeaWat=Buildings.Media.Water constrainedby Modelica.Media.Interfaces.PartialMedium "HHW medium"; parameter Buildings.Templates.AirHandlersFans.Types.Configuration typ "Type of system"; replaceable parameter Buildings.Templates.AirHandlersFans.Configuration.PartialAirHandler cfg( final typ=typ, final typFanSup=typFanSup, final typFanRel=typFanRel, final typFanRet=typFanRet, final have_souChiWat=have_souChiWat, final have_souHeaWat=have_souHeaWat) "Configuration parameters"; inner parameter Integer nZon(min=1) "Number of served zones"; replaceable parameter Buildings.Templates.AirHandlersFans.Data.PartialAirHandler dat( cfg=cfg) "Design and operating parameters"; final parameter String id=dat.id "System tag"; parameter Boolean have_porRel= typ==Buildings.Templates.AirHandlersFans.Types.Configuration.ExhaustOnly "Set to true for relief (exhaust) fluid port"; parameter Boolean have_souChiWat "Set to true if system uses CHW"; parameter Boolean have_souHeaWat "Set to true if system uses HHW"; inner parameter Buildings.Templates.Components.Types.Fan typFanSup "Type of supply fan"; inner parameter Buildings.Templates.Components.Types.Fan typFanRet "Type of return fan"; inner parameter Buildings.Templates.Components.Types.Fan typFanRel "Type of relief fan"; parameter Integer nFanSup "Number of supply fans"; parameter Integer nFanRet "Number of return fans"; parameter Integer nFanRel "Number of relief fans"; // Design parameters final parameter Modelica.Units.SI.MassFlowRate mAirSup_flow_nominal= dat.mAirSup_flow_nominal "Supply air mass flow rate"; final parameter Modelica.Units.SI.MassFlowRate mAirRet_flow_nominal= dat.mAirRet_flow_nominal "Return air mass flow rate"; parameter Modelica.Units.SI.MassFlowRate mChiWat_flow_nominal "Total CHW mass flow rate"; parameter Modelica.Units.SI.MassFlowRate mHeaWat_flow_nominal "Total HHW mass flow rate"; parameter Modelica.Units.SI.HeatFlowRate QChiWat_flow_nominal "Total CHW heat flow rate"; parameter Modelica.Units.SI.HeatFlowRate QHeaWat_flow_nominal "Total HHW heat flow rate"; parameter Modelica.Fluid.Types.Dynamics energyDynamics= Modelica.Fluid.Types.Dynamics.DynamicFreeInitial "Type of energy balance: dynamic (3 initialization options) or steady state"; final parameter Boolean allowFlowReversalAir=true "= true to allow flow reversal, false restricts to design direction - Air side"; parameter Boolean allowFlowReversalLiq=true "= true to allow flow reversal, false restricts to design direction - CHW and HW side"; parameter Boolean show_T = false "= true, if actual temperature at ports of subcomponents is computed"; Modelica.Fluid.Interfaces.FluidPort_a port_Out( redeclare final package Medium = MediumAir, m_flow(min=if allowFlowReversalAir then -Modelica.Constants.inf else 0), h_outflow(start=MediumAir.h_default, nominal=MediumAir.h_default)) if typ <> Buildings.Templates.AirHandlersFans.Types.Configuration.ExhaustOnly "Outdoor air intake"; Modelica.Fluid.Interfaces.FluidPort_b port_Sup( redeclare final package Medium =MediumAir, m_flow(max=if allowFlowReversalAir then +Modelica.Constants.inf else 0), h_outflow(start=MediumAir.h_default, nominal=MediumAir.h_default)) if typ == Buildings.Templates.AirHandlersFans.Types.Configuration.SupplyOnly or typ == Buildings.Templates.AirHandlersFans.Types.Configuration.SingleDuct "Supply air"; Modelica.Fluid.Interfaces.FluidPort_b port_SupCol( redeclare final package Medium =MediumAir, m_flow(max=if allowFlowReversalAir then +Modelica.Constants.inf else 0), h_outflow(start=MediumAir.h_default, nominal=MediumAir.h_default)) if typ == Buildings.Templates.AirHandlersFans.Types.Configuration.DualDuct "Dual duct cold deck air supply"; Modelica.Fluid.Interfaces.FluidPort_b port_SupHot( redeclare final package Medium =MediumAir, m_flow(max=if allowFlowReversalAir then +Modelica.Constants.inf else 0), h_outflow(start=MediumAir.h_default, nominal=MediumAir.h_default)) if typ == Buildings.Templates.AirHandlersFans.Types.Configuration.DualDuct "Dual duct hot deck air supply"; Modelica.Fluid.Interfaces.FluidPort_a port_Ret( redeclare final package Medium =MediumAir, m_flow(min=if allowFlowReversalAir then -Modelica.Constants.inf else 0), h_outflow(start=MediumAir.h_default, nominal=MediumAir.h_default)) if typ <> Buildings.Templates.AirHandlersFans.Types.Configuration.SupplyOnly "Return air"; Modelica.Fluid.Interfaces.FluidPort_b port_Rel( redeclare final package Medium = MediumAir, m_flow(max=if allowFlowReversalAir then +Modelica.Constants.inf else 0), h_outflow(start=MediumAir.h_default, nominal=MediumAir.h_default)) if typ <> Buildings.Templates.AirHandlersFans.Types.Configuration.SupplyOnly and have_porRel "Relief (exhaust) air"; Modelica.Fluid.Interfaces.FluidPort_b port_bChiWat( redeclare final package Medium = MediumChiWat, m_flow(max=if allowFlowReversalLiq then +Modelica.Constants.inf else 0), h_outflow(start=MediumChiWat.h_default, nominal=MediumChiWat.h_default)) if have_souChiWat "CHW return port"; Modelica.Fluid.Interfaces.FluidPort_a port_aChiWat( redeclare final package Medium = MediumChiWat, m_flow(min=if allowFlowReversalLiq then -Modelica.Constants.inf else 0), h_outflow(start=MediumChiWat.h_default, nominal=MediumChiWat.h_default)) if have_souChiWat "CHW supply port"; Modelica.Fluid.Interfaces.FluidPort_b port_bHeaWat( redeclare final package Medium = MediumHeaWat, m_flow(max=if allowFlowReversalLiq then +Modelica.Constants.inf else 0), h_outflow(start=MediumHeaWat.h_default, nominal=MediumHeaWat.h_default)) if have_souHeaWat "HHW return port"; Modelica.Fluid.Interfaces.FluidPort_a port_aHeaWat( redeclare final package Medium = MediumHeaWat, m_flow(min=if allowFlowReversalLiq then -Modelica.Constants.inf else 0), h_outflow(start=MediumHeaWat.h_default, nominal=MediumHeaWat.h_default)) if have_souHeaWat "HHW supply port"; Buildings.Templates.AirHandlersFans.Interfaces.Bus bus "AHU control bus"; Buildings.BoundaryConditions.WeatherData.Bus busWea "Weather bus"; Buildings.Templates.ZoneEquipment.Interfaces.Bus busTer[nZon] "Terminal unit control bus"; end PartialAirHandler;