Lecture-18-Energyplus-Templates-and-Autosizing

Lecture18:TemplateSystemsandAutosizingMaterialpreparedbyGARDAnalytics,Inc.andUniversityofIllinoisatUrbana-ChampaignundercontracttotheNationalRenewableEnergyLaboratory.AllmaterialCopyright2002-2003U.S.D.O.E.-Allrightsreserved2PurposeofthisLectureIntroduceTemplates—atimesavingfeaturePuttinganactualsystemtogetherinEnergyPlus(byhand)canbedifficultandtimeconsumingTemplatesprovideshorthandwayofdescribingsystemsIntroduceAutosizingSomecomponentsrequiresizesthattheusermaynotknowimmediatelyAutosizingasksEnergyPlustosizetheseautomatically3HVACSystemTemplatesTemplatePurposeCurrentTemplatesFutureTemplatesTemplateConceptsUsingHVACTemplatesHVACTemplateStructureTypicalHVACSystemsTemplateExampleInputs/Results4TemplatePurposeHVACsystemtemplatesprovideashorthandwayofdescribingselectedstandardHVACsystemconfigurations5CurrentTemplatesZoneThermostatPurchasedAirFourPipeFanCoilVAVSingleDuctw/ReheatPackagedFurnacew/DXAirConditioner6CurrentTemplates(cont’d)PurchasedHotandChilledWaterSupplyLoopsSingleBoilerandChillerSupplyLoops7FutureTemplatesConstantVolumeDualDuctVariableVolumeDualDuctVAVw/PowerInductionUnitHeatPumpsAddautomaticautosizingtoalltemplatesProvide“IDFSegments”fortemplatesystemsMultipleBoilerandChillerSupplyLoopsMultipleEquipmentCondenserLoop8TemplateConceptsBeneficialforsettinguptheloops,branches,andnodesNotasbeneficialforfans,pumps,chillers,coils,etc.,Theonlyautomaticfieldsaretheobjectname,nodenames,andmaybeflowrates.Forautosizedtemplatesthedefaultsarealreadyspecified9TemplateConcepts(Non-Autosized)UserassignsatemplatevariableforeachoftheremainingfieldsintheobjectforFans,Coils,Chillers,etc…Advantage:order-independentkeywordstoassignvaluestoDisadvantage:mappingthevariablenamestoobjectfieldsismessy,andthentheuserhastogofindtheobjectdocumentationtounderstandwhatthevariablesreallymean10UsingHVACTemplatesTodescribetypicalHVACsystemconfigurations,acombinationofsystemmacrocommandsisusedalongwiththerequiredmacrovariabledefinitionspriortoeachcommand11HVACTemplateStructureInputFile.imf##includeHVACTemplates.imfRegularEnergyPlusobjectsRUNPERIOD,1,1,12,31;...HVACTemplatecommands:##set1ZoneName=RESISTIVEZONE##set1AvailSched=FanAndCoilAvailSched##set1HeatSuppAirTemp=50##set1CoolSuppAirTemp=13##set1HeatSuppAirHR=0.015##set1CoolSuppAirHR=0.010PurchAirZone[]...EP-Macro.exeEPMIDFFileRegularEnergyPlusobjectsaftermacroprocessing(“CleanIDFfile”)EnergyPlus.exeEnergyPlusoutputfilesEnergyPlusoutputfilesEnergyPlusoutputfilesEP-LaunchorRunEplus.bat12TypicalHVACSystemsPurchasedAirSystemZoneThermostat[](onceforeachzone)PurchAirZone[](onceforeachzone)PackagedFurnacew/DXCoolingZoneThermostat[](onceforeachzone)DirectAirZone[](onceforeachzone)UnitaryAirLoop[]13TypicalHVACSystems(cont’d)Single-DuctVAVSystemw/OAOptionZoneThermostat[](onceforeachzone)VAVZone[](onceforeachzone)VAVAirLoop[]ChilledWaterDemand[]HotWaterDemand[]14TypicalHVACSystems(cont’d)SingleChillerSupplyPlantChillerSupply1[]Condenser1[]SingleBoilerSupplyPlantBoilerSupply1[]15TemplateExampleInputs-Thermostat##includeHVACTemplates.imf!Commandtoinserttemplatemasterfile!MasterZone##set1ZoneName=RESISTIVEZONE!Zonename##set1ZoneCtrlSched=Zone-Control-Type-Sched!CntrlTypeSched##set1SnglHeatSPSched=Heating-Setpoints!SingleHeatSPSched##set1SnglCoolSPSched=Cooling-Setpoints!SingleCoolSPSched##set1SnglHtClSPSched=None!SingleHeat/CoolSPSch##set1DualSPHeatSched=None!DualSPHeatSPSched##set1DualSPCoolSched=None!DualSPCoolSPSchedZoneThermostat[]!Triggerthezonethermostatmacro16TemplateExampleResults-ThermostatZONECONTROL:THERMOSTATIC,RESISTIVEZONEThermostat,RESISTIVEZONE,Zone-Control-Type-Sched,SingleHeatingSetpoint,RESISTIVEZONESingleHeatSPSched,SingleCoolingSetPoint,RESISTIVEZONESingleCoolSPSched;SINGLEHEATINGSETPOINT,RESISTIVEZONESingleHeatSPSched,Heating-Setpoints;SINGLECOOLINGSETPOINT,RESISTIVEZONESingleCoolSPSched,Cooling-Setpoints;17TemplateExampleInputs–DirectAirZone##set1ZoneName=RESISTIVEZONE!Zonename##set1AvailSched=FanAndCoilAvailSched!SystemAvailSched##set1ZoneSuppAirFlow=2.0!Supplyairflow[m3/s]DirectAirZone[]!Triggerthedirectairzonemacro18TemplateExampleResults–DirectAirZoneCONTROLLEDZONEEQUIPCONFIGURATION,RESISTIVEZONE,!zonenameRESISTIVEZONEEquipment,!zoneequipmentlistRESISTIVEZONEInlets,!inletnodelist,!exhaustnodelistRESISTIVEZONEZoneNode,!zonenodeRESISTIVEZONEOutletNode;!zoneoutletnodeZONEEQUIPMENTLIST,RESISTIVEZONEEquipment,!nameDIRECTAIR,RESISTIVEZONEDirectAir,1,1;NODELIST,RESISTIVEZONEInlets,!nameRESISTIVEZONEAirTermInletNode;!zoneinletisthedirectairDIRECTAIR,RESISTIVEZONEDirectAir,!-DirectAirNameFanAndCoilAvailSched,!-Schedulenameforon/offscheduleRESISTIVEZONEAirTermInletNode,!-ZoneSupplyAirNodeName2.0;!-Maximumairflowrate{m3/s}19HVACSizingOptionsComponentSizingZoneSizingSystemSizingPlantSizing20ComponentSizingComponentsaretypicallyautosizedbasedonspecifiedsummerandwinterdesigndays.GlobalsizingfactoroptionalSizingfactortypically1.0Sizingfactorcanbeanyvalue0Default1.0SIZINGPARAMETERS,1.2;!-sizingfactor21ZoneSizingCalculatesrequire