case study: 3kw cell tower western australia
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PPTCaseStudyPowercamp®
3kWOff-gridcelltowerinNewman,WesternAustralia
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Location– Irradiation
Ø Hypotheticaltelecomoff-gridsiteinNewman,WA• Latitude23° 21,75’S• Longitude119° 40,22’E• Scaledannualaverageirradiation:6,23kWh/m2/day
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ConsumerLoadProfile
Ø Continuous48Vdc-load• Average:3kW• Peak:3,54kW• ScaledannualAverage:72kWh/day• Annualload:26.280KWh
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Systemset-up
Ø 1unitofTigerPower’sStorager withfollowingkeycomponents:• TigerPower’sEnergyManagementSystemincl.RemoteMonitoring• Rainwatercatchmentsystemof15m2(equalstoca. 4600ltr/yr)• (Rain)watertank1.000ltr• 2.000L/helectrolyser withrainwaterinletfilter• 5kWFuelCellsystem• 4HydrogenStoragetanksof850L• Receptionfacilityfor24H2-cylinersat200bar(back-up)
Ø 4unitsofTigerPower’sproprietarySunfolds• Total installedsolarpanels:18,8kWp• 48Vdcbatterybankswithatotalnominalcapacityof76,8Kwh
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EnergyGeneration
Ø Atthegivenlocation4Sunfolds havetogetherfollowingproductiondata:• Ratedcapacity:18,8kWp• MeanOutput:4,5kW• MeanDailyOutput:108,5kWh• CapacityFactor:24,056%• MaximumOutput:18,7kW• HoursofOperation:4.388h/yr
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Shorttermenergystorage
Ø Thesystemisequippedwitha48Vdcbatterybanktoprovideshorttermenergystorage• Nominalcapacity:76,8Kwh• Usablenominalcapacity:38,4kWh(tolimitDODto50%)• Autonomy:ca.12hours
Ø AnnualStateofChargegraph:
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Long-termenergystorage
Ø ThesystemisequippedwithaHydrogencycletoprovideforlong-termenergystorage:
Ø On-siteHydrogenStorage:• capacity:9,2kg• Tankautonomy:306kWhorca.102hrs
Ø Thebelowgraphsshowsthetankleveltroughtheyear:
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Self-sustainability
Ø AnnualDCload=26.280kWhØ AnnualElectricityProduction:
• PVarray:39.617kWh(directconsumption+battery+on-siteelectrolyser )• FuelCell:2.594KWh
Ø AnnualH2 consumption:165kg• On-siteelectrolyser :149kgor91%• Back-upH2-supply:15kgor9%(duringmonthswithlowerirradiation)
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Ø Energy-wisethesystemhasaself-sustainability ratioof99,2%!Ø ExternalsupplyofH2 islimitedtoone truckdeliveryperyearwith2racks
of8xB50bottles!
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