SustainableHybridACUPSBy

JimHeidenreich/MarkAlrutzAlphaTechnologiesInc./CommScopeInc.

TheNextGenerationCriticalFacilityIncreasedReliabilitywithRenewableEnergy

WhileMaintainingBestCostPractices

ReferenceID#0070000318DerekDiGiacomo

SCTECorporate,6105947310,ddigiacomo@scte.org SeniorDirector,InformationSystems&EnergyManagementPrograms

MerleSeeman

CommScopeEnergySolutions,6103636888,mseeman@commscope.com ProductLineManager

JimHeidenreich

AlphaTechnologies,3603922672,jheidenreich@alpha.com VPProductManagement&CustomerFulfillment

3767AlphaWay

BellinghamWA982263606472360

www.alpha.com

140PhilipsRdExton,PA193416103636888www.scte.org

1100CommScopePlSEHickory,NC286028283242200

www.commscope.com

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.

TheHybridACUPSsystemreducesoperationsexpensesbysupportingthecriticalloadwiththe2.88kWsolararrayshowninthephotobelow.Sharp235WattpanelsxQty12.

PVmodulesconvertlighttoelectricityatanatomiclevel,therearenomovingparts.SolarPanels(PVmodules)aredesignedtogenerateelectricityforthirtyyearsormore.

HybridGridTieACUPSwithFuelCell,BatteryandPhotoVoltaic(PV)Subsystems

NormalUtilityNoPVPresentPowerFlowYellow Blue

PhotoVoltaic(PV)PanelsusinganadvancedMPPT(MaximumPowerPointTracking)ChargeControllertechnologywhichprovides97%solarharvestefficiencytoprovidearenewableenergyoutputof48VoltDCpowertofeedtheGridTied/DCBackedInverter.NormalUtilitywithPVOffsetPowerFlow=Green Blue(feedstheinvertersupportingtheload) Green Yellow(excessPVbackfeedstheUtilityMeter)

2.88kWArrayproduces

12.67kW/DayintheSummer8.04kW/DayintheWinter

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.

PowerOutagewithFuelCellBackupPowerFlow=Purple Blue****RedshownasBridgefor90secondsuntilFuelCellstarts

ADual48VStringofAlphaCellREbatteriesprovidesa90secondbridgefortheHydrogenFuelCelltostart.(PowerFlow=Purple+Red Blue).OncestartedtheHydrogenFuelCellsuppliesthefirststageemergencybackupinunisonwithsolarassistifpresent(PowerFlow=Green+Purple Blue).IftheHydrogensourceisexhaustedthenthebatteriesprovideanadditionallastlineofruntimedefenseprovidinganadditional11hoursofemergencybackupruntime(PowerFlow=Green+Red Blue).PowerOutagewithFuelCellBackupandPVOffsetPowerFlow=Purple Blue** **Redshownas90secondBridgeforFuelCellstarts =Green Blue(PVAssisttoAugmentRuntime)

PowerOutagewithBatteryBackupOnlyPowerFlow=Red Blue

QQty248VDCStringsofAlphaCell170REBatteriesprovide11hoursbackuptimetothe1.5kWCriticalLoad

PowerOutagewithBatteryBackupandPVAssistAddedRuntimePowerFlow=Red Blue =Green Blue =Green Red(PVfeedsloadandcouldrechargebatteries)

2.88kWArrayGenerates:Summer12.32kWh/Day

=+7.8HoursRuntime@1.5kWWinter7.97kWh/Day

=+5.2HoursRuntime@1.5kW

Qty248VDCStringsofAlphaCell170REBatteriesprovide11hoursbackuptimetothe1.5kWCriticalLoad

ACommScopeCabinetbasedHydrogenFuelCellsubsystemlocatedoutsideofthebuildingwhichprovidesemergencybackuppowerduringACUtilityMainsfailurebyconvertingHydrogentoa48VoltDC.ThisoutputfeedstheDCBackedInverterwhichsupportsthecriticalload.Thecurrentloadof1.5kWwillbesupportedfor85hourswithfullyfilledHydrogentanksandnosolarassist.TheBatterybackupadds11hoursforatotalof96hours4Daysbackup.PowerOutagewithFuelCellandBatteryBackupPowerFlow=Purple Blue =Red Blue

Qty248VDCStringsofAlphaCell170REBatteries

provide11hoursbackuptimetothe1.5kWCriticalLoad

ACommScopeCabinetbasedHydrogenFuelCellsubsystemlocatedoutsideofthebuildingwhichprovidesemergencybackuppowerduringACUtilityMainsfailurebyconvertingHydrogentoa48VoltDC.ThisoutputfeedstheDCBackedInverterwhichsupportsthecriticalload.Thecurrentloadof1.5kWwillbesupportedfor85hourswithfullyfilledHydrogentanksandnosolarassist.TheBatterybackupadds11hoursforatotalof96hours4Daysbackup.DuringtheSummerthe2.88kWPVsystemwilladdapproximately19.8hours.DuringtheWinterthe2.88kWPVsystemwilladdapproximately8.34hours.PowerOutagewithFuelCell,BatteryBackupandPVAssistPowerFlow=Purple Blue =Red Blue =Green Blue

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