Sustainable Hybrid AC UPS By Jim Heidenreich/ Mark Alrutz Alpha Technologies Inc./ CommScope Inc. The Next Generation Critical Facility Increased Reliability with Renewable Energy While Maintaining Best Cost Practices Reference ID # 0070‐000318 Derek DiGiacomo – SCTE Corporate, 610‐594‐7310, [email protected] – Senior Director, Information Systems & Energy Management Programs Merle Seeman – CommScope Energy Solutions, 610‐363‐6888, [email protected] – Product Line Manager Jim Heidenreich – Alpha Technologies, 360‐392‐2672, [email protected] – VP Product Management & Customer Fulfillment 3767 Alpha Way Bellingham WA 98226 360 647 2360 www.alpha.com 140 Philips Rd Exton, PA 19341 610‐363‐6888 www.scte.org 1100 CommScope Pl SE Hickory, NC 28602 828‐324‐2200 www.commscope.com
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SustainableHybridACUPSBy
JimHeidenreich/MarkAlrutzAlphaTechnologiesInc./CommScopeInc.
TheNextGenerationCriticalFacilityIncreasedReliabilitywithRenewableEnergy
WhileMaintainingBestCostPractices
ReferenceID#0070000318DerekDiGiacomo
SCTECorporate,6105947310,[email protected] SeniorDirector,InformationSystems&EnergyManagementPrograms
MerleSeeman
CommScopeEnergySolutions,6103636888,[email protected] ProductLineManager
JimHeidenreich
AlphaTechnologies,3603922672,[email protected] VPProductManagement&CustomerFulfillment
3767AlphaWay
BellinghamWA982263606472360
www.alpha.com
140PhilipsRdExton,PA193416103636888www.scte.org
1100CommScopePlSEHickory,NC286028283242200
www.commscope.com
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SCTEispositionedasthegotoresourcefortechnicaloperationssurroundingpowerandavailability.Werealizetheimportanceofhardeningournetworktoensurecommunicationavailability.Takingthesixsigmaapproachofstrivingtoachievethe"59's"ofavailabilityforwebsite,network,communicationsandservicesavailability;SCTEbeganwiththefoundationofavailabilitypower.Takingtheforwardthinkingapproachwhileperformingatotalcostofownershipanalysis,SCTEselectedtopioneerahybridpowersysteminlieuoftraditionaldieselgeneratorbackuppower.CasestudiespresentedduringSCTE'sSmartEnergyManagementInitiative(SEMI)meetingsprovidedoverwhelmingevidencethatforthecriticalloadleveloflessthan2kW;solar,batteryandahydrogenfuelcellwouldbethesimplest,mostreliableandcertainlymostsustainableselectionforcriticalpowerbackupneeds.Thefollowingwhitepaperreviewstheengineeringconceptsofhowthesystemsupportsthecriticalloadinbothdaytodayoperationsaswellasduringagridoutage.Overview:TheSCTEisleadingtheindustrybyimplementingaSustainableHybridACGridtiedemergencypoweringsystemtosimultaneouslyservedualpurposes
(1)toprovideRedundantpowerforDisasterRecovery(2)tooffsetUtilityCostsusingRenewableEnergy.
ThisparticularsolutionisappropriateforSmalltoMediumsized1kWto3.5kWCriticalLoadsandTelecommunicationsDataCenters.ThePoweringSystemutilizesmultipleintegratedbackupsubsystemsasdescribedbelow.OthersystemdesignscanbesizedwithlargerACUPSGridTieinvertersupto8kWtotakefulladvantageofthe8kWFuelCellsystem.ThisHybridACUPSsystemaddressesdisasterpreparednessbyprovidingatotalautonomyof96hours(4Days)+SolarAssisttimeduringdaylighthours.TheSolarAssisttimevarieswithseasonsandsolaravailabilitysoitshouldnotbereliedupontoextendedruntimesbutdoesofferupsidetothe4Dayautonomy.
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TheHybridACUPSsystemreducesoperationsexpensesbysupportingthecriticalloadwiththe2.88kWsolararrayshowninthephotobelow.Sharp235WattpanelsxQty12.
PVmodulesconvertlighttoelectricityatanatomiclevel,therearenomovingparts.SolarPanels(PVmodules)aredesignedtogenerateelectricityforthirtyyearsormore.
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HybridGridTieACUPSwithFuelCell,BatteryandPhotoVoltaic(PV)Subsystems
NormalUtilityNoPVPresentPowerFlowYellow Blue
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PhotoVoltaic(PV)PanelsusinganadvancedMPPT(MaximumPowerPointTracking)ChargeControllertechnologywhichprovides97%solarharvestefficiencytoprovidearenewableenergyoutputof48VoltDCpowertofeedtheGridTied/DCBackedInverter.NormalUtilitywithPVOffsetPowerFlow=Green Blue(feedstheinvertersupportingtheload) Green Yellow(excessPVbackfeedstheUtilityMeter)
2.88kWArrayproduces
12.67kW/DayintheSummer8.04kW/DayintheWinter
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Incasesofanextendedgridpoweroutage,SCTEhasinstalledaCommScopehydrogenfuelcelltoprovideyetanotherlayerofreliableandcosteffectivebackuppower.Thissolutionoffersmanybenefitstoboththesocietyandtheenvironmentquiet,cleanandsustainableenergy.Hydrogenfuelcellsaredevicesthatenableadirectelectrochemicalreaction,withoutmechanicalconversionsooftenassociatedwithelectricalgeneration.TheCommScopefuelcelldeployedbySCTEutilizesProtonExchangeMembrane(PEM)fuelcelltechnology.Hydrogenisappliedtotheanodicsideofacatalystlayerwhereitisionized,allowingtheprotonstopassthroughthemembranewhiletheelectronstraveltothecathode,completingacircuit.Onthecathodicside,thehydrogeniscombinedwithoxygenfromtheair,formingpurewaterasabyproduct.ThehydrogenfuelcelldeployedislocatedinanoutdoorCommScopecabinet,soitdoesnotconsumevaluableenvironmentallycontrolledindoorarea.InthecaseofMSOfacilities,thefuelcellcanreplacelargeandcostlyUPSsystems,freeingspaceforrevenuegeneratingequipmentorsimplyreducingtheHVACloadoncriticalfacilities.TheCommScopefuelcelloutputis48VDC.ThisoutputfeedstheDCbackedinverterwhichsupportsthecriticalACload.WhentheCommScopefuelcellssystemcontrollerdetectsabatteryvoltagedropcombinedwiththeabsenceofgridpower,thefuelcellswitchesonbyopeningthesupplyofhydrogentothefuelcellstack.Givenasteadysupplyofhydrogen,thefuelcellcanruncontinuouslyforaslongasanoutageoccurs.Foran8kWload,8cylindersofhydrogenwilllast8hours.Inthiscase,SCTEhasalowerloadrequirementof1.5kW,thefuelcellwith(16)hydrogencylindersrunningwithoutsolarassistwilllastapproximately85hours.Giventhepresenceofsolarassistandbatteries,theavailabilityofthesystemismuchlonger.
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PowerOutagewithFuelCellBackupPowerFlow=Purple Blue****RedshownasBridgefor90secondsuntilFuelCellstarts
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ADual48VStringofAlphaCellREbatteriesprovidesa90secondbridgefortheHydrogenFuelCelltostart.(PowerFlow=Purple+Red Blue).OncestartedtheHydrogenFuelCellsuppliesthefirststageemergencybackupinunisonwithsolarassistifpresent(PowerFlow=Green+Purple Blue).IftheHydrogensourceisexhaustedthenthebatteriesprovideanadditionallastlineofruntimedefenseprovidinganadditional11hoursofemergencybackupruntime(PowerFlow=Green+Red Blue).PowerOutagewithFuelCellBackupandPVOffsetPowerFlow=Purple Blue** **Redshownas90secondBridgeforFuelCellstarts =Green Blue(PVAssisttoAugmentRuntime)
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PowerOutagewithBatteryBackupOnlyPowerFlow=Red Blue
QQty248VDCStringsofAlphaCell170REBatteriesprovide11hoursbackuptimetothe1.5kWCriticalLoad
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PowerOutagewithBatteryBackupandPVAssistAddedRuntimePowerFlow=Red Blue =Green Blue =Green Red(PVfeedsloadandcouldrechargebatteries)
2.88kWArrayGenerates:Summer12.32kWh/Day
Qty248VDCStringsofAlphaCell170REBatteriesprovide11hoursbackuptimetothe1.5kWCriticalLoad
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ACommScopeCabinetbasedHydrogenFuelCellsubsystemlocatedoutsideofthebuildingwhichprovidesemergencybackuppowerduringACUtilityMainsfailurebyconvertingHydrogentoa48VoltDC.ThisoutputfeedstheDCBackedInverterwhichsupportsthecriticalload.Thecurrentloadof1.5kWwillbesupportedfor85hourswithfullyfilledHydrogentanksandnosolarassist.TheBatterybackupadds11hoursforatotalof96hours4Daysbackup.PowerOutagewithFuelCellandBatteryBackupPowerFlow=Purple Blue =Red Blue
Qty248VDCStringsofAlphaCell170REBatteries
provide11hoursbackuptimetothe1.5kWCriticalLoad
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ACommScopeCabinetbasedHydrogenFuelCellsubsystemlocatedoutsideofthebuildingwhichprovidesemergencybackuppowerduringACUtilityMainsfailurebyconvertingHydrogentoa48VoltDC.ThisoutputfeedstheDCBackedInverterwhichsupportsthecriticalload.Thecurrentloadof1.5kWwillbesupportedfor85hourswithfullyfilledHydrogentanksandnosolarassist.TheBatterybackupadds11hoursforatotalof96hours4Daysbackup.DuringtheSummerthe2.88kWPVsystemwilladdapproximately19.8hours.DuringtheWinterthe2.88kWPVsystemwilladdapproximately8.34hours.PowerOutagewithFuelCell,BatteryBackupandPVAssistPowerFlow=Purple Blue =Red Blue =Green Blue
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SustainableHybridACUPSThissystemaddressDisasterPreparednessbyprovidingatotalautonomyof96hours(4Days)+SolarAssisttimeduringdaylighthoursanditreducesOperationExpenses(OpEx)byutilizingrenewableenergysourcesintheprimarypoweringinfrastructure.Longerruntimeisachievableifsolarassistand/orhydrogensupplyremainavailable.SummaryCommScope8kWHydrogenFuelCell(upto85hoursofruntimeunder1.5kWload)2.8kWPhotoVoltaicSharpPanelsprovideoffsettoutilitycostsandaugmentsbackupruntime3.5(kW)OutbackDCtoACGridTiedInvertersupportscriticalloadFM80(80Amp)OutbackChargeControllerregulatesPVinputtotheDCbusQty8AlphaCell170AHREBatteriesproviding11hoursofruntimeunder1.5kWload
3767AlphaWayBellinghamWA98226
3606472360www.alpha.com
140PhilipsRdExton,PA193416103636888www.scte.org
1100CommScopePlSEHickory,NC286028283242200
www.commscope.com
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