Lecture-17-Energyplus-VAV-and-TRH

Lecture17:VAVandTerminalReheatSystemsMaterialpreparedbyGARDAnalytics,Inc.andUniversityofIllinoisatUrbana-ChampaignundercontracttotheNationalRenewableEnergyLaboratory.AllmaterialCopyright2002-2003U.S.D.O.E.-Allrightsreserved2PurposeofthisLectureGainanunderstandingofhowto:DefineAirLoopsandZoneEquipmentinputforvarioustypesoffansystemsVAVTerminalReheatReviewvariouskeywordsalreadycoveredandshowhowtheyinteracttoformacompletesystemdefinitionVAVSystemsinEnergyPlus4VAVwithReheatandOutsideAirExampleAirLoopcontainstheMixedAirSystem,SupplyFanandtheCoolingCoilOutsideairsystemwillbediscussedlaterinmoredetailZoneEquipmentLoopcontainstheSplitter,VAVBoxAirDistributionUnit,thezones,andtheReturnAirPathwiththeMixer.NorthZoneEastZoneResistiveZoneSupplyFanReturnAirMixerZoneAirSplitterCCVAVBox:ReHeatVAVBox:ReHeatMixedOutsideAirBoxReliefAirOutsideAirVAVBox:ReHeatNorthZoneEastZoneResistiveZoneSupplyFanReturnAirMixerZoneAirSplitterCCVAVBox:ReHeatVAVBox:ReHeatMixedOutsideAirBoxReliefAirOutsideAirVAVBox:ReHeatChilledWaterReturnChilledWaterSupplyReturnAir5VAVwithReheatAirLoopAirPrimaryLoop,TypicalTerminalReheat1,!-PrimaryAirLoopNameReheatSystem1Controllers,!-Name:ControllerListReheatSystem1AvailList,!-Name:SystemAvailabilityManagerList1.3,!-Primaryairdesignvolumetricflowrate{m3/s}AirLoopBranches,!-AirLoopBranchListName,!-AirLoopConnectorListNameAirLoopInletNode,!-ReturnAirAirLoopInletNodeReturnAirMixerOutletNode,!-ZoneEquipGroupOutletNodeZoneEquipmentInletNode,!-SupplyAirPathZoneEquipGroupInletNodesAirLoopOutletNode;!-AirLoopOutletNodesSupplyFanCCMixedOutsideAirBoxReliefAirOutsideAirSupplyFanCCMixedOutsideAirBoxReliefAirOutsideAirChilledWaterReturnChilledWaterSupplyReturnAir6VAVwithReheatControllerandBranchListsCONTROLLERLIST,ReheatSystem1Controllers,!-NameController:Simple,!-ControllerType1MainCoolingCoilController;!-ControllerName1BRANCHLIST,AirLoopBranches,!-BranchListNameAirLoopMainBranch;!-BranchName1SupplyFanCCMixedOutsideAirBoxReliefAirOutsideAirSupplyFanCCMixedOutsideAirBoxReliefAirOutsideAirChilledWaterReturnChilledWaterSupplyReturnAir7VAVwithReheatMainBranchBRANCH,AirLoopMainBranch,!-BranchName1.3,!-MaximumBranchFlowRate{m3/s}OUTSIDEAIRSYSTEM,!-Comp1TypeOASys1,!-Comp1NameAirLoopInletNode,!-Comp1InletNodeNameMixedAirNode,!-Comp1OutletNodeNamePASSIVE,!-Comp1BranchControlTypeFAN:SIMPLE:VariableVolume,!-Comp2TypeVarVolSupplyFan1,!-Comp2NameMixedAirNode,!-Comp2InletNodeNameCoolingCoilAirInletNode,!-Comp2OutletNodeNameACTIVE,!-Comp2BranchControlTypecont’donnextslideSupplyFanCCMixedOutsideAirBoxReliefAirOutsideAirSupplyFanCCMixedOutsideAirBoxReliefAirOutsideAirChilledWaterReturnChilledWaterSupplyReturnAir8VAVwithReheatMainBranch(cont’d)COIL:Water:DetailedFlatCooling,!-Comp3TypeDetailedCoolingCoil,!-Comp3NameCoolingCoilAirInletNode,!-Comp3InletNodeNameAirLoopOutletNode,!-Comp3OutletNodeNamePASSIVE;!-Comp3BranchControlTypeSupplyFanCCMixedOutsideAirBoxReliefAirOutsideAirSupplyFanCCMixedOutsideAirBoxReliefAirOutsideAirChilledWaterReturnChilledWaterSupplyReturnAir9VAVwithReheatSystemAvailabilityManagerSYSTEMAVAILABILITYMANAGERLIST,ReheatSystem1AvailList,!-NameSYSTEMAVAILABILITYMANAGER:SCHEDULED,!-SystemAvailabilityManagertype1ReheatSystem1Avail;!-SystemAvailabilityManagername1SYSTEMAVAILABILITYMANAGER:SCHEDULED,ReheatSystem1Avail,!-NameFanAndCoilAvailSched;!-SchedulenameSupplyFanCCMixedOutsideAirBoxReliefAirOutsideAirSupplyFanCCMixedOutsideAirBoxReliefAirOutsideAirChilledWaterReturnChilledWaterSupplyReturnAir10VAVwithReheatSupplyFanFAN:SIMPLE:VariableVolume,VarVolSupplyFan1,!-FanNameCoolingCoilAvailSched,!-AvailableSchedule0.7,!-FanTotalEfficiency600.0,!-DeltaPressure{Pa}1.3,!-MaxFlowRate{m3/s}0.20,!-MinFlowRate{m3/s}0.9,!-MotorEfficiency1.0,!-MotorInAirstreamFraction0.35071223,!-FanCoefficient10.30850535,!-FanCoefficient2-0.54137364,!-FanCoefficient30.87198823,!-FanCoefficient40.000,!-FanCoefficient5AirLoopInletNode,!-Fan_Inlet_NodeCoolingCoilAirInletNode;!-Fan_Outlet_NodeSupplyFanCCMixedOutsideAirBoxReliefAirOutsideAirSupplyFanCCMixedOutsideAirBoxReliefAirOutsideAirChilledWaterReturnChilledWaterSupplyReturnAir11VAVwithReheatCoolingCoilCOIL:Water:SimpleCooling,MainCoolingCoil1,!-CoilNameCoolingCoilAvailSched,!-AvailableScheduleautosize,!-UAoftheCoil{W/K}autosize,!-MaxWaterFlowRateofCoil{m3/s}0.9,!-LeavingRelativeHumidityofCoilMainCoolingCoil1WaterInletNode,!-Coil_Water_Inlet_NodeMainCoolingCoil1WaterOutletNode,!-Coil_Water_Outlet_NodeMixedAirNode1,!-Coil_Air_Inlet_NodeMainCoolingCoil1OutletNode;!-Coil_Air_Outlet_NodeSupplyFanCCMixedOutsideAirBoxReliefAirOutsideAirSupplyFanCCMixedOutsideAirBoxReliefAirOutsideAirChilledWaterReturnChilledWaterSupplyReturnAir12VAVwithReheatCoolingCoilControllerController:Simple,MainCoolingCoilController,!-NameTEMP,!-ControlvariableReverse,!-ActionFLOW,!-ActuatorvariableAirLoopOutletNode,!-Control_NodeCoolingCoilWaterInletNode,!-Actuator_Node0.001,!-ControllerConvergenceTolerance:deltatempfromsetpoint{C}0.0011,!-MaxActuatedFlow{m3/s}0.0;!-MinActuatedFlow{m3/s}SupplyFanCCMixedOutsideAirBoxReliefAirO