model ChillerDXHeatingEconomizer "Variable air volume flow system with single themal zone and conventional control" extends Modelica.Icons.Example; extends Buildings.Air.Systems.SingleZone.VAV.Examples.BaseClasses.PartialOpenLoop ( hvac(QCoo_flow_nominal=-10000)); parameter Modelica.SIunits.Temperature TSupChi_nominal=279.15 "Design value for chiller leaving water temperature"; Buildings.Air.Systems.SingleZone.VAV.BaseClasses.ControllerChillerDXHeatingEconomizer con( minAirFlo=0.1, minOAFra=0.4, controllerTypeHea=Buildings.Controls.OBC.CDL.Types.SimpleController.P, controllerTypeCoo=Buildings.Controls.OBC.CDL.Types.SimpleController.P, kCoo=1, TiCoo=120, controllerTypeFan=Buildings.Controls.OBC.CDL.Types.SimpleController.P, kFan=4, controllerTypeEco=Buildings.Controls.OBC.CDL.Types.SimpleController.P, kEco=4, kHea=4, TSupChi_nominal=TSupChi_nominal, TSetSupAir=286.15) "Controller for single zone VAV system"; Buildings.Controls.OBC.CDL.Continuous.Sources.TimeTable TSetRooHea( table=[ 0, 15 + 273.15; 8*3600, 20 + 273.15; 18*3600, 15 + 273.15; 24*3600, 15 + 273.15], smoothness=Buildings.Controls.OBC.CDL.Types.Smoothness.ConstantSegments, extrapolation=Buildings.Controls.OBC.CDL.Types.Extrapolation.Periodic) "Heating setpoint for room temperature"; Buildings.Controls.OBC.CDL.Continuous.Sources.TimeTable TSetRooCoo( table=[ 0, 30 + 273.15; 8*3600, 25 + 273.15; 18*3600, 30 + 273.15; 24*3600, 30 + 273.15], smoothness=Buildings.Controls.OBC.CDL.Types.Smoothness.ConstantSegments, extrapolation=Buildings.Controls.OBC.CDL.Types.Extrapolation.Periodic) "Cooling setpoint for room temperature"; Buildings.Controls.SetPoints.OccupancySchedule occSch(occupancy=3600*{8,18}) "Occupancy schedule"; equation connect(TSetRooHea.y[1], con.TSetRooHea); connect(TSetRooCoo.y[1], con.TSetRooCoo); connect(hvac.uFan, con.yFan); connect(hvac.uHea, con.yHea); connect(con.yCooCoiVal, hvac.uCooVal); connect(hvac.uEco, con.yOutAirFra); connect(con.chiOn, hvac.chiOn); connect(hvac.TSetChi, con.TSetSupChi); connect(hvac.TMix, con.TMix); connect(hvac.TSup, con.TSup); connect(zon.TRooAir, con.TRoo); connect(occSch.occupied, con.uOcc); connect(weaBus.TDryBul, con.TOut); end ChillerDXHeatingEconomizer;

model Guideline36 "Variable air volume flow system with single themal zone and ASHRAE Guideline 36 sequence control" extends Modelica.Icons.Example; extends Buildings.Air.Systems.SingleZone.VAV.Examples.BaseClasses.PartialOpenLoop ( hvac(QCoo_flow_nominal=-10000)); parameter Modelica.SIunits.Temperature TSupChi_nominal=279.15 "Design value for chiller leaving water temperature"; Buildings.Controls.OBC.ASHRAE.G36_PR1.AHUs.SingleZone.VAV.Controller con( have_winSen=true, TZonHeaOn=293.15, TZonCooOff=303.15, kCoo=4, kCooCoi=1, yHeaMax=0.2, AFlo=48, VOutMin_flow=0.0144, VOutDes_flow=0.025, yMin=0.1, kHea=4, kMod=4, have_occSen=false, TZonHeaOff=288.15, TZonCooOn=298.15, TSupSetMax=343.15, TSupSetMin=286.15, yDam_VOutMin_minSpe=0.2304, yDam_VOutMin_maxSpe=0.02304, yDam_VOutDes_minSpe=0.4, yDam_VOutDes_maxSpe=0.04) "VAV controller"; Buildings.Controls.OBC.CDL.Continuous.Hysteresis hysChiPla( uLow=-1, uHigh=0) "Hysteresis with delay to switch on cooling"; Modelica.Blocks.Math.Feedback errTRooCoo "Control error on room temperature for cooling"; Controls.SetPoints.OccupancySchedule occSch(occupancy=3600*{8,18}) "Occupancy schedule"; Modelica.Blocks.Sources.BooleanConstant uWin(k=false) "Window opening signal"; Buildings.Controls.OBC.CDL.Integers.Sources.Constant demLim(final k=0) "Cooling and heating demand imit level"; Buildings.Controls.OBC.CDL.Continuous.Sources.Constant cooWarTim(final k=0) "Cooldown and warm-up time"; protected Modelica.Blocks.Sources.Constant TSetSupChiConst(final k=TSupChi_nominal) "Set point for chiller temperature"; equation connect(con.yFan, hvac.uFan); connect(con.yHeaCoi, hvac.uHea); connect(con.yOutDamPos, hvac.uEco); connect(TSetSupChiConst.y, hvac.TSetChi); connect(errTRooCoo.y, hysChiPla.u); connect(zon.TRooAir, errTRooCoo.u1); connect(hysChiPla.y, hvac.chiOn); connect(weaBus.TDryBul, con.TOut); connect(zon.TRooAir, con.TZon); connect(hvac.TSup, con.TSup); connect(hvac.TMix, con.TMix); connect(occSch.tNexOcc, con.tNexOcc); connect(con.uOcc, occSch.occupied); connect(uWin.y, con.uWin); connect(con.TZonCooSet, errTRooCoo.u2); connect(hvac.TRet, con.TCut); connect(demLim.y, con.uCooDemLimLev); connect(demLim.y, con.uHeaDemLimLev); connect(cooWarTim.y, con.warUpTim); connect(cooWarTim.y, con.cooDowTim); connect(con.yCooCoi, hvac.uCooVal); end Guideline36;