COMPARISONOFASHRAESTANDARD-9011891ANDIECCC

COMPARISONOFASHRAESTANDARD-90.1,189.1ANDIECCCODESFORLARGEOFFICEBUILDINGSINTEXASJayaMukhopadhyayJuan-CarlosBaltazar,Ph.D.HyojinKim,JeffS.Haberl,Ph.D.,P.E.,CyndiLewis,BahmanYazdani,P.E.EnergySystemsLaboratoryTexasA&MUniversity20thOctober2011NewYorkEnergySystemsLaboratoryTexasA&MUniversitySystemOctober2011ESL-TR-11-10-10STRUCTUREBACKGROUNDMETHODOLOGYCLIMATEZONEDECRIPTIONBASECASEDESCRIPTIONRESULTSSUMMARYEnergySystemsLaboratory20112/30ESL-TR-11-10-10BACKGROUNDCodescompared:ASHRAE90.1-1989ASHRAE90.1-1999ASHRAE90.1-2004ASHRAE90.1-2007IECC2009ASHRAE90.1-2010ASHRAE189.1-2009ThepurposeistoassessthestringencyofeachcodeASHRAE90.1-1989selectedasthebase-caseEnergySystemsLaboratory20113/30ESL-TR-11-10-10METHODOLOGYPerformanceoptionoutlinedinthecodesusedtodesignthebasecaseDOE-2.1eusedforsimulationsAnalysisconductedforSiteenergyusageSourceenergyusageEnergySystemsLaboratory20114/30ESL-TR-11-10-10CLIMATEZONESThreecountiesselectedforanalysisEachcountyrepresentsaclimatezoneHarris(ClimateZone2A)Tarrant(ClimateZone3A)Potter(ClimateZone4B)Thecountiescoverthemajorpopulationhubsinthestate5/30EnergySystemsLaboratory2011POTTERTARRANTHARRISESL-TR-11-10-10BASE-CASETheinputwascategorizedintothefollowingcategories:ProgramFormFabricEquipmentEnergySystemsLaboratory20116/3000.10.20.30.40.50.60.70.80.91123456789101112131415161718192021222324FRACTIONOFOCCUPANCYHOUROFDAY00.10.20.30.40.50.60.70.80.91123456789101112131415161718192021222324FRACTIONOFOCCUPANCYHOUROFDAYESL-TR-11-10-1000.10.20.30.40.50.60.70.80.91123456789101112131415161718192021222324FRACTIONOFPOWERHOUROFDAY00.10.20.30.40.50.60.70.80.91123456789101112131415161718192021222324FRACTIONOFOCCUPANCYHOUROFDAYOperatingSchedules00.10.20.30.40.50.60.70.80.91123456789101112131415161718192021222324FRAC.OFWATERUSAGEHOUROFDAYBASE-CASE:ProgramSchedulesinclude:OccupancyInfiltrationServicehotwaterdemandLightingEquipmentHVACsystem&fanASHRAE90.1-1989usedasreferenceAssumedsameforallcodes,exceptASHRAE90.1-2010equipmentschedulesmodifiedtoreflect50%ofreceptacleoutletsswitchedoffwhennotinuseEnergySystemsLaboratory20117/30OCCUPANCYLIGHTING&EQUIPMENTSHWUSAGEESL-TR-11-10-10BASE-CASE:ProgramSpaceTemperatures70°Fforspaceheating75°FforspacecoolingThermostatsetbackof5°FEnergyCodeVer.ofASHRAE62.1cfm/per.cfm/sqftResultantOAcfmASHRAE90.1-198919815-1625ASHRAE90.1-1999198920-6500ASHRAE90.1-2004199920-6500ASHRAE90.1-2007200450.066983ASHRAE90.1-2010200750.066983IECC2009200750.066983ASHRAE189.1-2009200750.066983+EnergySystemsLaboratory20118/30VentilationRequirementsPeakoccupancy:275sq.ft./personASHRAE62.1usedtocalculatetheventilationrequirementsESL-TR-11-10-10BASE-CASE:FormSixstoryofficebuilding:Footprintarea:14,884sq.ft.Totalfloorarea:89,304sq.ft.Floortofloorheight:13ft.Floortoceilingheight:9ft.Windowtowallarearatio:40%NoshadingexceptASHRAE189.1-2009(PFforSouth:0.50)Aspectratio:ForASHRAE90.1-1989:2.5:1Forothermodels:1.5:1Fourperimeterzones&corezoneforeachfloor:15ft.deepEnergySystemsLaboratory20119/30ESL-TR-11-10-10BASE-CASE:FabricASHRAE90.1-1989requires0.038cfm/sq.ft.NospecificationsforwholebuildinginfiltrationinASHRAE90.1-1999,2004,2007orIECC2009Air-barriersmandatoryintheASHRAE90.1-2010&ASHRAE189.1-2009EnergyCodeOperatingHoursACHNon-OperatingHoursACHASHRAE90.1-1989–2007&IECC2009CoreZones0.0430.170PerimeterZones0.0700.280ASHRAE90.1-2010&189.1-2009CoreZones0.00950.0375PerimeterZones0.01550.0618InfiltrationEnergySystemsLaboratory201110/30AirChangemethodusedWhenHVACsystemON,infiltrationreducedby75%ESL-TR-11-10-10BASE-CASE:FabricBuildingEnvelopeCharacteristicsSteelframewallsRoofinsulationentirelyabovemetaldeckSlab-on-gradeforthefloorEnergySystemsLaboratory201111/30ClimateZoneASHRAE90.11989ASHRAE90.11999ASHRAE90.12007IECC2009ASHRAE90.12010ASHRAE189.12009SteelFrameWalls2AR-6.5R-13R-13R-13R-13R-13+R-5c.i3AR-6.5R-13R-13+R3.8c.iR-13+R3.8c.iR-13+R3.8c.iR-13+R-5c.i4BR-16.5R-13R-13+R7.5c.iR-13+R7.5c.iR-13+R7.5c.iR-13+R10c.iInsulationEntirelyAboveRoof2AR-13.5c.iR-15c.iR-20c.iR-20c.iR-20c.iR-25c.i3AR-15.75c.iR-15c.iR-20c.iR-20c.iR-20c.iR-25c.i4BR-15.5c.iR-15c.iR-20c.iR-20c.iR-20c.iR-25c.iMetalFrameWindowU-Value2AU-1.15U-1.22U-0.75U-0.75U-0.75U-0.753AU-1.15U-1.22U-0.65U-0.65U-0.65U-0.654BU-0.81U-0.46U-0.55U-0.55U-0.55U-0.45WindowSHGC2A0.610.170.250.250.250.253A0.610.150.250.250.250.254B0.610.250.400.400.400.40SlabOnGrade2AN.RN.RN.RN.RN.RN.R3AN.RN.RN.RN.RN.RN.R4BN.RN.RN.RN.RN.RR-10at4ft.IncreaseinStringencyESL-TR-11-10-10BASE-CASE:FabricRoof&WallAbsorptanceRoof&WallEmittanceEnergySystemsLaboratory201112/30EnergyCodeRoof/WallAbsorptanceASHRAE90.1-19890.7/0.7ASHRAE90.1-1999ASHRAE90.1-2004ASHRAE90.1-2007IECC20090.75/0.75ASHRAE90.1-2010CZ2&3:0.45/0.7CZ4:0.7/0.7ASHRAE189.1-20090.55/0.7EnergyCodeRoof/WallEmittanceASHRAE90.1-19890.9/0.9ASHRAE90.1-1999ASHRAE90.1-2004ASHRAE90.1-2007IECC20090.75/0.75ASHRAE90.1-20100.9/0.9ASHRAE189.1-2009ESL-TR-11-10-10PlugLoadsBASE-CASE:EquipmentEnergyCodeLightingPowerDensity(W/sq.ft.)ASHRAE90.1-19891.57ASHRAE90.1-19991.3ASHRAE90.1-20041ASHRAE90.1-