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HELiOSEESim™

PerformanceSimulationforEnergyEfficiencyRetrofitProjects

ValidationReportinaccordancewithASHRAESTANDARD140-2011

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Contents

OverviewofHELiOSEESimASHRAE140-2011Tests..................................................................................3

ASHRAE140TestingOverview....................................................................................................................3

TestingScope...............................................................................................................................................3

Case600–BaseCaseLowMassBuilding...............................................................................................4

Case610–SouthShadingTestforLowMassBuilding...........................................................................4

Case620–East/WestWindowOrientationTestforLowMassBuilding..............................................5

Case630–East/WestShadingTestforLowMassBuilding...................................................................5

Case640–ThermostatSetbackTestforLowMassBuilding.................................................................5

TestingResults.............................................................................................................................................5

Summary......................................................................................................................................................8

References...................................................................................................................................................9

AboutHeliosExchange..............................................................................................................................10

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HELiOSEESimValidationReportinaccordancewithASHRAESTANDARD140-2011

OverviewofHELiOSEESimASHRAE140-2011Tests

ThisreportdescribesthebuildingthermalenvelopeandfabrictestingresultsinaccordancewithASHRAE140-2011titledStandardMethodofTestfortheEvaluationofBuildingEnergyAnalysisComputerProgramswithHELiOSEESim.ThetestingresultsofHELiOSEESimarecomparedwithBESTESTresultsthatsimulatedthesametestcasesfromotherwholebuildingenergyanalysisprogramsapprovedbyDOE.ThereportshowsthatcomputingresultsusingHELiOSEESimarereasonablecomparedtootherenergysimulationapplications.

ASHRAE140TestingOverview

ASHRAEStandard140-2011providesthestandardmethodoftestfortheevaluationofbuildingenergyanalysiscomputerprogramstocompareaprogramtoitselfortootherenergysimulationapplications.Therearemanyenergysimulationprogramsdevelopedtomodelaspectsofthewholebuildingenergyperformance.Itisimportanttotestthevalidityofsuchprograms.TheUnitedStatesDepartmentofEnergy’sNationalRenewableEnergyLaboratory(NREL)hasdevelopedanoverallmethodologytoevaluatetheaccuracyofwhole-buildingenergysimulationprograms,andtoidentifyanddiagnosedifferencesinsimulationpredictionsthatmaybecausedbyalgorithmicdifferences,modelinglimitations,codingerrors,orinputerrors(NREL2006).ThismethodhasbeenadoptedbyANSI/ASHRAEStandard140-2001and2004:MethodofTestfortheEvaluationofBuildingEnergyAnalysisComputerPrograms(ASHRAE2001,2004).ThemethodhasbeenenhancedinANSI/ASHRAE140-2011(ASHRAE2011).ASHRAE140Standardisforbenchmarkingenergyengineresultsbyanalyzingmultipletestcases,andcomparingresultsagainstaspecifiedsetofengines,whichprovidesanacceptablerangeoftestingresultscomparingresultsofotherenergysimulationenginestestedtothesamemethodology(ASHRAE,2011).

TestingScope

HELiOSEESimvalidationfollowstheASHRAE140ClassItestproceduresthatrequiretheenergysimulationwith:1)time-stepsofonehourorless,2)fullannualsimulation,and3)weatherdata,DRYCOLD.TMYfile.TheweatherfileusedforallsimulationsisprovidedalongwithStandard140-2011,whichcontainshourlyweatherforanentireyearwhichischaracterizedas“coldclearwinters/hotdrysummers.”

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Figure1:ASHRAE140StandardGeometry

Thebasebuildingplanshallbea48m²floorarea,singlestory,lowmassbuildingwithrectangularshapegeometryand12m²ofsouth-facingwindowsasshowninFigure1.PleaserefertoASHRAE140-2011Section5formodelingassumptiondetails.

Thisreportprovidesthetestingdescriptionandresultsofthebuildingthermalenvelopeandfabricloadtests:basecase(Case600)andbasiclowmasstests(Case610to640).

Comparisonmeasuresarethecalculatedthermalloads:

• AnnualheatinginMWh• AnnualcoolinginMWh• PeakheatinginkW• PeakcoolinginkW

ThethermalloadsimulationresultsfromHELiOSEESimarecomparedtoseetheresultsfallwithintherangeofspreadofresultsforotherwholebuildingenergysimulationprogramsthatincludeBLAST,DOE2.1D,DOE2.1E,EnergyPlus8.0,ESP,SRE/SUN,SERIRES,S3PAS,TASE,andTRNSYS.

Case600–BaseCaseLowMassBuilding

Thebasictestbuilding(Figure1)isarectangularsinglezone(8mwidex6mlongx2.7mhigh)withnointeriorpartitionsand12m2ofwindowsonthesouthexposure.Thebuildingisoflightweightconstructionwithcharacteristicsasdescribedbelow.ForfurtherdetailsrefertoSection5.2.1ofANSI/ASHRAEStandard140-2011.

Case610–SouthShadingTestforLowMassBuilding

Case610usestheBaseBuildingmodeledinCase600andaddsa1mhorizontaloverhangacrosstheentirelengthofsouthwalloverthesouthfacingwindowsattherooflevel.SeeFigure2.AllothercharacteristicsofthebuildingwereidenticaltotheBaseCasebuilding.Thiscaseteststheabilityofaprogramtotreatshadingofasouthexposedwindow.

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Case620–East/WestWindowOrientationTestforLowMassBuilding

Case620usestheBaseBuildingmodeledinCase600withthefollowingchanges:a)ThewindoworientationwasmodifiedasshowninFigure3suchthat6m2b)Thesouthwindowswereeliminatedandreplacedwiththewallconstructionusedthroughoutthebuildingofwindowareawasaddedtoboththeeastandwestwalls.ThewindowpropertiesareexactlythesameasinCase600

Case630–East/WestShadingTestforLowMassBuilding

Case630isexactlythesameasCase620exceptthatashadeoverhangandshadefinswereaddedaroundtheeastandwestwindow.SeeFigure4.A1mhorizontaloverhangislocatedattherooflevelandextendsacrossthe3mwidthofeachwindow.The1mwiderightandleftverticalshadefinsarelocatedaedgeofeachwindowandextendfromtheroofdowntotheground.

Case640–ThermostatSetbackTestforLowMassBuilding

Case640isidenticaltotheBaseCasebuildingofCase600exceptthefollowingheatingandcoolingtemperaturesetbackschedulewithanon-proportionalthermostatwasused:

a) From2300hoursto0700hours,heat=onifzonetemperature<10°Cb) From0700hoursto2300hours,heat=onifzonetemperature<20°Cc) Allhours,cool=onifzonetemperature>27°Cd) Otherwise,mechanicalequipmentisoff.e) SeeFigure1forschematicofbuilding.

Figure2IsometricViewofASHRAE140-2011TestingCases

TestingResults

TheenergysimulationresultsfromHELiOSEESimarecomparedwiththesuiteoftestsbasedonBuildingEnergySimulationTest(BESTEST)(IEA1995)andEnergyPlus8.0(GARDAnalytics2013).Figures3,4,5,6,and7showthetestingresults.ThecomputingresultsofEESimarecomparedtothatofBESTTESTminimum,maximumandEnergyPlus.Eachcomparesannualheatingandcooling,peakheatingandcooling.

Case600 Case610 Case620 Case630

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Figure3CASE600results


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Summary

HELiOSEESimistheenergysimulationenginethatmodelsthewholebuildingfortheenergyperformanceevaluation.ASHRAE140-2011testingwasconductedusingEESimtoevaluatethevalidityofthesimulationengine.ThetestingresultsforbuildingthermalenvelopeandfabricloadusingEESimareallwithintherangeofBESTESTminimumandmaximum.

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References

ASHARE.2001.ANSI/ASHRAEStandard140-2001,StandardMethodofTestfortheEvaluationofBuildingEnergyAnalysisComputerPrograms.Atlanta,GA:ASHRAE.

ASHARE.2004.ANSI/ASHRAEStandard140-2004.StandardMethodofTestfortheEvaluationofBuildingEnergyAnalysisComputerPrograms.Atlanta,GA:ASHRAE.

ASHARE.2011.ANSI/ASHRAEStandard140-2011.StandardMethodofTestfortheEvaluationofBuildingEnergyAnalysisComputerPrograms.Atlanta,GA:ASHRAE.

IEA.1995.BuildingEnergySimulationTest(BESTEST)andDiagnosticMethod,NREL,Golden,Colorado,February1995.

GARDAnalytics.2013.EnergyPlusTestingwithBuildingThermalEnvelopeandFabricLoadTestsfromANSI/ASHRAEStandard140-2011

NREL.2006.ModelValidationandTesting:TheMethodologicalFoundationofASHRAEStandard140.NREL/CP-550-40360

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AboutHeliosExchange

HeliosExchangeistheworld’sfirstcommercialrealestateplatformforenergyretrofitprojectdevelopment,insuranceandfinancing.Heliosprovidesbuildingownersandfacilitymanagerswithturnkeysolutionstodiscover,insureandfinancetheirenergyimprovementprojectswitheaseandconfidence,andcapturetheresultinggreenpremiumonassetvaluation.TherapidlygrowingHelios’databasecoversover150,000commercialproperties,15BillionsquarefeetofsmalltolargesizecommercialrealestateinmajorU.S.citieswithhigh-energyprices,stringentenergydisclosureandimprovementmandates,andlegislativesupportforinnovativecleanenergyprojectfinancingsuchasPACEprograms.

Thankstoitscity-scalesmartbuildingenergyanalytics,HeliosExchangehasidentifiedover$10Billioninannualenergysavingsandprofilecompellingbusinesscases.Throughitsnetworkoffinancingpartners,Helioscanprovideupto$500Millioninprojectfinanceacrossavarietyoffinancingmodelsforsmalltolargescalecleanenergyprojects.Heliospartnerswithanation-widenetworkofEnergyServiceProfessionalstocomplementthemwithenergyanalytics,insuranceandfinancing,enablingthemtoclosemorebusiness.WiththematuringoffinancingmodelssuchasEnergySavingsAgreementsandPACEfinancing,theemergenceofbigdataanalytics,andourinnovativetechnologytoquantifytheperformanceriskofcleanenergyprojects,Helioscanofferzero-downfinancingsolutions,insuretheperformancerisktobringconfidencetotheretrofittransactions,anddothisatcity-scale.

FoundedbysustainableinvestingpioneersPierreTrevet,formerHeadofSustainabilityFinanceatC3EnergyandHewsonBaltzell,formerManagingDirectoratMSCI,HeliosExchangehasofficesinSanFranciscoandNewYorkCity.

helios eesim™ performance simulation for energy …...thanks to its city-scale smart building...

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