Buildings.Examples.VAVReheat

Variable air volume flow system with terminal reheat and five thermal zones

Information

Extends from Modelica.Icons.ExamplesPackage (Icon for packages containing runnable examples).

Package Content

Name Description
Buildings.Examples.VAVReheat.ASHRAE2006 ASHRAE2006 Variable air volume flow system with terminal reheat and five thermal zones
Buildings.Examples.VAVReheat.Guideline36 Guideline36 Variable air volume flow system with terminal reheat and five thermal zones
Buildings.Examples.VAVReheat.Controls Controls Package with controller models
Buildings.Examples.VAVReheat.ThermalZones ThermalZones Package with models for the thermal zones
Buildings.Examples.VAVReheat.BaseClasses BaseClasses Package with base classes for Buildings.Examples.VAVReheat

Buildings.Examples.VAVReheat.ASHRAE2006 Buildings.Examples.VAVReheat.ASHRAE2006

Variable air volume flow system with terminal reheat and five thermal zones

Buildings.Examples.VAVReheat.ASHRAE2006

Information

This model consist of an HVAC system, a building envelope model and a model for air flow through building leakage and through open doors.

The HVAC system is a variable air volume (VAV) flow system with economizer and a heating and cooling coil in the air handler unit. There is also a reheat coil and an air damper in each of the five zone inlet branches. The figure below shows the schematic diagram of the HVAC system

image

See the model Buildings.Examples.VAVReheat.BaseClasses.PartialOpenLoop for a description of the HVAC system and the building envelope.

The control is an implementation of the control sequence VAV 2A2-21232 of the Sequences of Operation for Common HVAC Systems (ASHRAE, 2006). In this control sequence, the supply fan speed is regulated based on the duct static pressure. The return fan controller tracks the supply fan air flow rate. The duct static pressure is adjusted so that at least one VAV damper is 90% open. The economizer dampers are modulated to track the setpoint for the mixed air dry bulb temperature. Priority is given to maintain a minimum outside air volume flow rate. In each zone, the VAV damper is adjusted to meet the room temperature setpoint for cooling, or fully opened during heating. The room temperature setpoint for heating is tracked by varying the water flow rate through the reheat coil. There is also a finite state machine that transitions the mode of operation of the HVAC system between the modes occupied, unoccupied off, unoccupied night set back, unoccupied warm-up and unoccupied pre-cool. In the VAV model, all air flows are computed based on the duct static pressure distribution and the performance curves of the fans. Local loop control is implemented using proportional and proportional-integral controllers, while the supervisory control is implemented using a finite state machine.

A similar model but with a different control sequence can be found in Buildings.Examples.VAVReheat.Guideline36.

References

ASHRAE. Sequences of Operation for Common HVAC Systems. ASHRAE, Atlanta, GA, 2006.

Extends from Modelica.Icons.Example (Icon for runnable examples), Buildings.Examples.VAVReheat.BaseClasses.PartialOpenLoop (Partial model of variable air volume flow system with terminal reheat and five thermal zones).

Parameters

TypeNameDefaultDescription
VolumeVRooCorAFloCor*flo.hRooRoom volume corridor [m3]
VolumeVRooSouAFloSou*flo.hRooRoom volume south [m3]
VolumeVRooNorAFloNor*flo.hRooRoom volume north [m3]
VolumeVRooEasAFloEas*flo.hRooRoom volume east [m3]
VolumeVRooWesAFloWes*flo.hRooRoom volume west [m3]
AreaAFloCorflo.cor.AFloFloor area corridor [m2]
AreaAFloSouflo.sou.AFloFloor area south [m2]
AreaAFloNorflo.nor.AFloFloor area north [m2]
AreaAFloEasflo.eas.AFloFloor area east [m2]
AreaAFloWesflo.wes.AFloFloor area west [m2]
AreaAFlo[numZon]{flo.cor.AFlo,flo.sou.AFlo,f...Floor area of each zone [m2]
MassFlowRatemCor_flow_nominal6*VRooCor*convDesign mass flow rate core [kg/s]
MassFlowRatemSou_flow_nominal6*VRooSou*convDesign mass flow rate perimeter 1 [kg/s]
MassFlowRatemEas_flow_nominal9*VRooEas*convDesign mass flow rate perimeter 2 [kg/s]
MassFlowRatemNor_flow_nominal6*VRooNor*convDesign mass flow rate perimeter 3 [kg/s]
MassFlowRatemWes_flow_nominal7*VRooWes*convDesign mass flow rate perimeter 4 [kg/s]
MassFlowRatem_flow_nominal0.7*(mCor_flow_nominal + mSo...Nominal mass flow rate [kg/s]
Anglelat41.98*3.14159/180Latitude [rad]
TemperatureTHeaOn293.15Heating setpoint during on [K]
TemperatureTHeaOff285.15Heating setpoint during off [K]
TemperatureTCooOn297.15Cooling setpoint during on [K]
TemperatureTCooOff303.15Cooling setpoint during off [K]
PressureDifferencedpBuiStaSet12Building static pressure [Pa]
RealyFanMin0.1Minimum fan speed
BooleanallowFlowReversaltrue= false to simplify equations, assuming, but not enforcing, no flow reversal
Booleanuse_windPressuretrueSet to true to enable wind pressure
Experimental (may be changed in future releases)
BooleansampleModeltrueSet to true to time-sample the model, which can give shorter simulation time if there is already time sampling in the system model

Connectors

TypeNameDescription
BusweaBusWeather Data Bus
ControlBuscontrolBus 

Modelica definition

model ASHRAE2006 "Variable air volume flow system with terminal reheat and five thermal zones" extends Modelica.Icons.Example; extends Buildings.Examples.VAVReheat.BaseClasses.PartialOpenLoop( heaCoi(show_T=true), cooCoi(show_T=true)); Modelica.Blocks.Sources.Constant TSupSetHea(y( final quantity="ThermodynamicTemperature", final unit="K", displayUnit="degC", min=0), k=273.15 + 10) "Supply air temperature setpoint for heating"; Controls.FanVFD conFanSup(xSet_nominal(displayUnit="Pa") = 410, r_N_min= yFanMin) "Controller for fan"; Controls.ModeSelector modeSelector; Controls.ControlBus controlBus; Controls.Economizer conEco( dT=1, VOut_flow_min=0.3*m_flow_nominal/1.2, Ti=600, k=0.1) "Controller for economizer"; Controls.RoomTemperatureSetpoint TSetRoo( final THeaOn=THeaOn, final THeaOff=THeaOff, final TCooOn=TCooOn, final TCooOff=TCooOff); Controls.DuctStaticPressureSetpoint pSetDuc( nin=5, controllerType=Modelica.Blocks.Types.SimpleController.PI, pMin=50) "Duct static pressure setpoint"; Controls.CoolingCoilTemperatureSetpoint TSetCoo "Setpoint for cooling coil"; Controls.RoomVAV conVAVCor "Controller for terminal unit corridor"; Controls.RoomVAV conVAVSou "Controller for terminal unit south"; Controls.RoomVAV conVAVEas "Controller for terminal unit east"; Controls.RoomVAV conVAVNor "Controller for terminal unit north"; Controls.RoomVAV conVAVWes "Controller for terminal unit west"; Buildings.Controls.Continuous.LimPID heaCoiCon( yMax=1, yMin=0, Td=60, initType=Modelica.Blocks.Types.InitPID.InitialState, controllerType=Modelica.Blocks.Types.SimpleController.PI, k=0.02, Ti=300) "Controller for heating coil"; Buildings.Controls.Continuous.LimPID cooCoiCon( reverseAction=true, Td=60, initType=Modelica.Blocks.Types.InitPID.InitialState, yMax=1, yMin=0, controllerType=Modelica.Blocks.Types.SimpleController.PI, Ti=600, k=0.1) "Controller for cooling coil"; Buildings.Controls.OBC.CDL.Logical.Switch swiHeaCoi "Switch to switch off heating coil"; Buildings.Controls.OBC.CDL.Logical.Switch swiCooCoi "Switch to switch off cooling coil"; Buildings.Controls.OBC.CDL.Continuous.Sources.Constant coiOff(k=0) "Signal to switch water flow through coils off"; Buildings.Controls.OBC.CDL.Logical.Or or2; equation connect(TSupSetHea.y, heaCoiCon.u_s); connect(fanSup.port_b, dpDisSupFan.port_a); connect(controlBus, modeSelector.cb); connect(min.y, controlBus.TRooMin); connect(ave.y, controlBus.TRooAve); connect(TRet.T, conEco.TRet); connect(TMix.T, conEco.TMix); connect(conEco.TSupHeaSet, TSupSetHea.y); connect(TSetRoo.controlBus, controlBus); connect(dpDisSupFan.p_rel, conFanSup.u_m); connect(pSetDuc.y, conFanSup.u); connect(TSetCoo.TSet, cooCoiCon.u_s); connect(TSetCoo.TSet, conEco.TSupCooSet); connect(TSupSetHea.y, TSetCoo.TSetHea); connect(modeSelector.cb, TSetCoo.controlBus); connect(conEco.VOut_flow, VOut1.V_flow); connect(conEco.yOA, eco.yOut); connect(conVAVCor.TRoo, TRooAir.y5[1]); connect(conVAVSou.TRoo, TRooAir.y1[1]); connect(TRooAir.y2[1], conVAVEas.TRoo); connect(TRooAir.y3[1], conVAVNor.TRoo); connect(TRooAir.y4[1], conVAVWes.TRoo); connect(conVAVCor.yDam, pSetDuc.u[1]); connect(conVAVSou.yDam, pSetDuc.u[2]); connect(pSetDuc.u[3], conVAVEas.yDam); connect(conVAVNor.yDam, pSetDuc.u[4]); connect(conVAVCor.TDis, TSupCor.T); connect(TSupSou.T, conVAVSou.TDis); connect(TSupEas.T, conVAVEas.TDis); connect(TSupNor.T, conVAVNor.TDis); connect(TSupWes.T, conVAVWes.TDis); connect(conVAVWes.yDam, pSetDuc.u[5]); connect(cor.yVAV, conVAVCor.yDam); connect(cor.yVal, conVAVCor.yVal); connect(conVAVSou.yDam, sou.yVAV); connect(conVAVSou.yVal, sou.yVal); connect(conVAVEas.yVal, eas.yVal); connect(conVAVEas.yDam, eas.yVAV); connect(conVAVNor.yDam, nor.yVAV); connect(conVAVNor.yVal, nor.yVal); connect(conVAVCor.TRooHeaSet, controlBus.TRooSetHea); connect(conVAVCor.TRooCooSet, controlBus.TRooSetCoo); connect(conVAVSou.TRooHeaSet, controlBus.TRooSetHea); connect(conVAVSou.TRooCooSet, controlBus.TRooSetCoo); connect(conVAVEas.TRooHeaSet, controlBus.TRooSetHea); connect(conVAVEas.TRooCooSet, controlBus.TRooSetCoo); connect(conVAVNor.TRooHeaSet, controlBus.TRooSetHea); connect(conVAVNor.TRooCooSet, controlBus.TRooSetCoo); connect(conVAVWes.TRooHeaSet, controlBus.TRooSetHea); connect(conVAVWes.TRooCooSet, controlBus.TRooSetCoo); connect(conVAVWes.yVal, wes.yVal); connect(wes.yVAV, conVAVWes.yDam); connect(occSch.tNexOcc, controlBus.dTNexOcc); connect(occSch.occupied, controlBus.occupied); connect(pSetDuc.TOut, TOut.y); connect(TOut.y, controlBus.TOut); connect(conEco.controlBus, controlBus); connect(modeSelector.yFan, conFanSup.uFan); connect(conFanSup.y, fanSup.y); connect(modeSelector.yFan, swiCooCoi.u2); connect(swiCooCoi.u1, cooCoiCon.y); connect(swiHeaCoi.u1, heaCoiCon.y); connect(coiOff.y, swiCooCoi.u3); connect(coiOff.y, swiHeaCoi.u3); connect(TSup.T, cooCoiCon.u_m); connect(TSup.T, heaCoiCon.u_m); connect(gaiHeaCoi.u, swiHeaCoi.y); connect(gaiCooCoi.u, swiCooCoi.y); connect(eco.yExh, conEco.yOA); connect(eco.yRet, conEco.yRet); connect(freSta.y, or2.u1); connect(or2.u2, modeSelector.yFan); connect(or2.y, swiHeaCoi.u2); end ASHRAE2006;

Buildings.Examples.VAVReheat.Guideline36 Buildings.Examples.VAVReheat.Guideline36

Variable air volume flow system with terminal reheat and five thermal zones

Buildings.Examples.VAVReheat.Guideline36

Information

This model consist of an HVAC system, a building envelope model and a model for air flow through building leakage and through open doors.

The HVAC system is a variable air volume (VAV) flow system with economizer and a heating and cooling coil in the air handler unit. There is also a reheat coil and an air damper in each of the five zone inlet branches.

See the model Buildings.Examples.VAVReheat.BaseClasses.PartialOpenLoop for a description of the HVAC system and the building envelope.

The control is based on ASHRAE Guideline 36, and implemented using the sequences from the library Buildings.Controls.OBC.ASHRAE.G36_PR1 for multi-zone VAV systems with economizer. The schematic diagram of the HVAC and control sequence is shown in the figure below.

image

A similar model but with a different control sequence can be found in Buildings.Examples.VAVReheat.ASHRAE2006. Note that this model, because of the frequent time sampling, has longer computing time than Buildings.Examples.VAVReheat.ASHRAE2006. The reason is that the time integrator cannot make large steps because it needs to set a time step each time the control samples its input.

Extends from Modelica.Icons.Example (Icon for runnable examples), Buildings.Examples.VAVReheat.BaseClasses.PartialOpenLoop (Partial model of variable air volume flow system with terminal reheat and five thermal zones).

Parameters

TypeNameDefaultDescription
VolumeVRooCorAFloCor*flo.hRooRoom volume corridor [m3]
VolumeVRooSouAFloSou*flo.hRooRoom volume south [m3]
VolumeVRooNorAFloNor*flo.hRooRoom volume north [m3]
VolumeVRooEasAFloEas*flo.hRooRoom volume east [m3]
VolumeVRooWesAFloWes*flo.hRooRoom volume west [m3]
AreaAFloCorflo.cor.AFloFloor area corridor [m2]
AreaAFloSouflo.sou.AFloFloor area south [m2]
AreaAFloNorflo.nor.AFloFloor area north [m2]
AreaAFloEasflo.eas.AFloFloor area east [m2]
AreaAFloWesflo.wes.AFloFloor area west [m2]
AreaAFlo[numZon]{flo.cor.AFlo,flo.sou.AFlo,f...Floor area of each zone [m2]
MassFlowRatemCor_flow_nominal6*VRooCor*convDesign mass flow rate core [kg/s]
MassFlowRatemSou_flow_nominal6*VRooSou*convDesign mass flow rate perimeter 1 [kg/s]
MassFlowRatemEas_flow_nominal9*VRooEas*convDesign mass flow rate perimeter 2 [kg/s]
MassFlowRatemNor_flow_nominal6*VRooNor*convDesign mass flow rate perimeter 3 [kg/s]
MassFlowRatemWes_flow_nominal7*VRooWes*convDesign mass flow rate perimeter 4 [kg/s]
MassFlowRatem_flow_nominal0.7*(mCor_flow_nominal + mSo...Nominal mass flow rate [kg/s]
Anglelat41.98*3.14159/180Latitude [rad]
TemperatureTHeaOn293.15Heating setpoint during on [K]
TemperatureTHeaOff285.15Heating setpoint during off [K]
TemperatureTCooOn297.15Cooling setpoint during on [K]
TemperatureTCooOff303.15Cooling setpoint during off [K]
PressureDifferencedpBuiStaSet12Building static pressure [Pa]
RealyFanMin0.1Minimum fan speed
BooleanallowFlowReversaltrue= false to simplify equations, assuming, but not enforcing, no flow reversal
Booleanuse_windPressuretrueSet to true to enable wind pressure
VolumeFlowRatemaxSysPriFlom_flow_nominal/1.2Maximum expected system primary airflow rate at design stage [m3/s]
VolumeFlowRateminZonPriFlo[numZon]{mCor_flow_nominal,mSou_flow...Minimum expected zone primary flow rate [m3/s]
TimesamplePeriod120Sample period of component, set to the same value as the trim and respond that process yPreSetReq [s]
PressureDifferencedpDisRetMax40Maximum return fan discharge static pressure setpoint [Pa]
Experimental (may be changed in future releases)
BooleansampleModeltrueSet to true to time-sample the model, which can give shorter simulation time if there is already time sampling in the system model

Connectors

TypeNameDescription
BusweaBusWeather Data Bus

Modelica definition

model Guideline36 "Variable air volume flow system with terminal reheat and five thermal zones" extends Modelica.Icons.Example; extends Buildings.Examples.VAVReheat.BaseClasses.PartialOpenLoop; parameter Modelica.SIunits.VolumeFlowRate maxSysPriFlo=m_flow_nominal/1.2 "Maximum expected system primary airflow rate at design stage"; parameter Modelica.SIunits.VolumeFlowRate minZonPriFlo[numZon]={ mCor_flow_nominal,mSou_flow_nominal,mEas_flow_nominal,mNor_flow_nominal, mWes_flow_nominal}/1.2 "Minimum expected zone primary flow rate"; parameter Modelica.SIunits.Time samplePeriod=120 "Sample period of component, set to the same value as the trim and respond that process yPreSetReq"; parameter Modelica.SIunits.PressureDifference dpDisRetMax=40 "Maximum return fan discharge static pressure setpoint"; Buildings.Controls.OBC.ASHRAE.G36_PR1.TerminalUnits.Controller conVAVCor( V_flow_nominal=mCor_flow_nominal/1.2, AFlo=AFloCor, final samplePeriod=samplePeriod) "Controller for terminal unit corridor"; Buildings.Controls.OBC.ASHRAE.G36_PR1.TerminalUnits.Controller conVAVSou( V_flow_nominal=mSou_flow_nominal/1.2, AFlo=AFloSou, final samplePeriod=samplePeriod) "Controller for terminal unit south"; Buildings.Controls.OBC.ASHRAE.G36_PR1.TerminalUnits.Controller conVAVEas( V_flow_nominal=mEas_flow_nominal/1.2, AFlo=AFloEas, final samplePeriod=samplePeriod) "Controller for terminal unit east"; Buildings.Controls.OBC.ASHRAE.G36_PR1.TerminalUnits.Controller conVAVNor( V_flow_nominal=mNor_flow_nominal/1.2, AFlo=AFloNor, final samplePeriod=samplePeriod) "Controller for terminal unit north"; Buildings.Controls.OBC.ASHRAE.G36_PR1.TerminalUnits.Controller conVAVWes( V_flow_nominal=mWes_flow_nominal/1.2, AFlo=AFloWes, final samplePeriod=samplePeriod) "Controller for terminal unit west"; Buildings.Controls.OBC.ASHRAE.G36_PR1.AHUs.MultiZone.Controller conAHU( numZon=numZon, maxSysPriFlo=maxSysPriFlo, minZonPriFlo=minZonPriFlo, AFlo=AFlo, yFanMin=yFanMin, pMaxSet=410) "AHU controller"; Buildings.Controls.OBC.ASHRAE.G36_PR1.TerminalUnits.ModeAndSetPoints TSetZon( THeaOn=THeaOn, THeaOff=THeaOff, TCooOff=TCooOff, numZon=numZon) "Zone temperature set points"; Modelica.Blocks.Routing.Multiplex5 TDis "Discharge air temperatures"; Modelica.Blocks.Routing.Multiplex5 VBox_flow "Air flow rate at the terminal boxes"; Buildings.Controls.OBC.CDL.Integers.MultiSum TZonResReq(nin=5) "Number of zone temperature requests"; Buildings.Controls.OBC.CDL.Integers.MultiSum PZonResReq(nin=5) "Number of zone pressure requests"; Buildings.Controls.OBC.CDL.Continuous.Sources.Constant yOutDam(k=1) "Outdoor air damper control signal"; Buildings.Controls.OBC.CDL.Logical.Switch swiFreSta "Switch for freeze stat"; Buildings.Controls.OBC.CDL.Continuous.Sources.Constant freStaSetPoi1(k=273.15 + 3) "Freeze stat for heating coil"; Buildings.Controls.OBC.CDL.Continuous.Sources.Constant yFreHeaCoi(final k=1) "Flow rate signal for heating coil when freeze stat is on"; equation connect(fanSup.port_b, dpDisSupFan.port_a); connect(conVAVCor.TRoo, TRooAir.y5[1]); connect(conVAVSou.TRoo, TRooAir.y1[1]); connect(TRooAir.y2[1], conVAVEas.TRoo); connect(TRooAir.y3[1], conVAVNor.TRoo); connect(TRooAir.y4[1], conVAVWes.TRoo); connect(conVAVCor.TDis, TSupCor.T); connect(TSupSou.T, conVAVSou.TDis); connect(TSupEas.T, conVAVEas.TDis); connect(TSupNor.T, conVAVNor.TDis); connect(TSupWes.T, conVAVWes.TDis); connect(cor.yVAV, conVAVCor.yDam); connect(cor.yVal, conVAVCor.yVal); connect(conVAVSou.yDam, sou.yVAV); connect(conVAVSou.yVal, sou.yVal); connect(conVAVEas.yVal, eas.yVal); connect(conVAVEas.yDam, eas.yVAV); connect(conVAVNor.yDam, nor.yVAV); connect(conVAVNor.yVal, nor.yVal); connect(conVAVCor.TRooHeaSet, TSetZon.THeaSet[1]); connect(conVAVCor.TRooCooSet, TSetZon.TCooSet[1]); connect(conVAVSou.TRooHeaSet, TSetZon.THeaSet[2]); connect(conVAVSou.TRooCooSet, TSetZon.TCooSet[2]); connect(conVAVEas.TRooHeaSet, TSetZon.THeaSet[3]); connect(conVAVEas.TRooCooSet, TSetZon.TCooSet[3]); connect(conVAVNor.TRooHeaSet, TSetZon.THeaSet[4]); connect(conVAVNor.TRooCooSet, TSetZon.TCooSet[4]); connect(conVAVWes.TRooHeaSet, TSetZon.THeaSet[5]); connect(conVAVWes.TRooCooSet, TSetZon.TCooSet[5]); connect(conVAVWes.yVal, wes.yVal); connect(wes.yVAV, conVAVWes.yDam); connect(TSetZon.uOcc, occSch.occupied); connect(occSch.tNexOcc, TSetZon.tNexOcc); connect(TSetZon.TZon, flo.TRooAir); connect(conAHU.THeaSet, TSetZon.THeaSet[1]); connect(conAHU.TCooSet, TSetZon.TCooSet[1]); connect(conAHU.TZon, flo.TRooAir); connect(conAHU.TOut, TOut.y); connect(TRet.T, conAHU.TOutCut); connect(conAHU.TSup, TSup.T); connect(dpDisSupFan.p_rel, conAHU.ducStaPre); connect(conAHU.uOpeMod, TSetZon.yOpeMod); connect(conAHU.TDis, TDis.y); connect(conAHU.VBox_flow, VBox_flow.y); connect(conVAVCor.uOpeMod, TSetZon.yOpeMod); connect(conVAVSou.uOpeMod, TSetZon.yOpeMod); connect(conVAVEas.uOpeMod, TSetZon.yOpeMod); connect(conVAVNor.uOpeMod, TSetZon.yOpeMod); connect(conVAVWes.uOpeMod, TSetZon.yOpeMod); connect(conAHU.uZonTemResReq, TZonResReq.y); connect(conVAVCor.yZonTemResReq, TZonResReq.u[1]); connect(conVAVSou.yZonTemResReq, TZonResReq.u[2]); connect(conVAVEas.yZonTemResReq, TZonResReq.u[3]); connect(conVAVNor.yZonTemResReq, TZonResReq.u[4]); connect(conVAVWes.yZonTemResReq, TZonResReq.u[5]); connect(conVAVCor.yZonPreResReq, PZonResReq.u[1]); connect(conVAVSou.yZonPreResReq, PZonResReq.u[2]); connect(conVAVEas.yZonPreResReq, PZonResReq.u[3]); connect(conVAVNor.yZonPreResReq, PZonResReq.u[4]); connect(conVAVWes.yZonPreResReq, PZonResReq.u[5]); connect(conAHU.uZonPreResReq, PZonResReq.y); connect(VSupCor_flow.V_flow, VBox_flow.u1[1]); connect(VSupSou_flow.V_flow, VBox_flow.u2[1]); connect(VSupEas_flow.V_flow, VBox_flow.u3[1]); connect(VSupNor_flow.V_flow, VBox_flow.u4[1]); connect(VSupWes_flow.V_flow, VBox_flow.u5[1]); connect(TSupCor.T, TDis.u1[1]); connect(TSupSou.T, TDis.u2[1]); connect(TSupEas.T, TDis.u3[1]); connect(TSupNor.T, TDis.u4[1]); connect(TSupWes.T, TDis.u5[1]); connect(conAHU.yOutDamPos, eco.yOut); connect(conVAVCor.VDis, VSupCor_flow.V_flow); connect(VSupSou_flow.V_flow, conVAVSou.VDis); connect(VSupEas_flow.V_flow, conVAVEas.VDis); connect(VSupNor_flow.V_flow, conVAVNor.VDis); connect(VSupWes_flow.V_flow, conVAVWes.VDis); connect(TSup.T, conVAVCor.TSupAHU); connect(TSup.T, conVAVSou.TSupAHU); connect(TSup.T, conVAVEas.TSupAHU); connect(TSup.T, conVAVNor.TSupAHU); connect(TSup.T, conVAVWes.TSupAHU); connect(VOut1.V_flow, conAHU.VOut_flow); connect(fanSup.y, conAHU.ySupFanSpe); connect(conAHU.yCoo, gaiCooCoi.u); connect(conAHU.TMix, TMix.T); connect(conAHU.yRetDamPos, eco.yRet); connect(yOutDam.y, eco.yExh); connect(conAHU.yHea, swiFreSta.u3); connect(swiFreSta.y, gaiHeaCoi.u); connect(freSta.y, swiFreSta.u2); connect(yFreHeaCoi.y, swiFreSta.u1); end Guideline36;