第1页共8页编号：时间：2021年x月x日书山有路勤为径，学海无涯苦作舟页码：第1页共8页ChemicaltreatmentofcrystallinesiliconsolarcellsasamethodofrecoveringpuresiliconfromphotovoltaicmodulesRenewableEnergyPhotovoltaictechnologyisusedworldwidetoprovidereliableandcost-effectiveelectricityforindustrial,commercial,residentialandcommunityapplications.TheaveragelifetimeofPVmodulescanbeexpectedtobemorethan25years.ThedisposalofPVsystemswillbecomeaprobleminviewofthecontinuallyincreasingproductionofPVmodules.Thesecanberecycledforaboutthesamecostastheirdisposal.Photovoltaicmodulesincrystallinesiliconsolarcellsaremadefromthefollowingelements,inorderofmass:glass,aluminiumframe,EVAcopolymertransparenthermetisinglayer,photovoltaiccells,installationbox,Tedlar®protectivefoilandassemblybolts.Fromaneconomicpointofview,takingintoaccountthepriceandsupplylevel,puresilicon,whichcanberecycledfromPVcells,isthemostvaluableconstructionmaterialused.Recoveringpuresiliconfromdamagedorend-of-lifePVmodulescanleadtoeconomicandenvironmentalbenefits.Becauseofthehighqualityrequirementfortherecoveredsilicon,chemicalprocessingisthemostimportantstageoftherecyclingprocess.Thechemicaltreatmentconditionsneedtobepreciselyadjustedinordertoachievetherequiredpurityleveloftherecoveredsilicon.ForPVsystemsbasedoncrystallinesilicon,aseriesofetchingprocesseswascarriedoutasfollows:etchingofelectricconnectors,anti-reflectivecoatingandn-pjunction.Thechemistryofetchingsolutionswasindividuallyadjustedforthedifferentsiliconcelltypes.Effortsweremadetoformulateauniversalcompositionfortheetchingsolution.Theprincipaltaskatthispointwastooptimisetheetchingtemperature,timeandalkaliconcentrationinsuchawaythatonlyasmuchsiliconwasremovedasnecessary.Engineering,institutions,andthepublicinterest:EvaluatingproductqualityintheKenyan第2页共8页第1页共8页编号：时间：2021年x月x日书山有路勤为径，学海无涯苦作舟页码：第2页共8页solarphotovoltaicsindustryEnergyPolicySolarsalesinKenyaareamongthehighestpercapitaamongdevelopingcountries.WhilethiscommercialsuccessmakestheKenyamarketagloballeader,productqualityproblemshavebeenapersistentconcern.Inthispaper,wereportperformancetestresultsfrom2004to2005forfivebrandsofamorphoussilicon(a-Si)photovoltaic(PV)modulessoldintheKenyamarket.Threeofthefivebrandsperformedwell,buttwoperformedwellbelowtheiradvertisedlevels.Theseresultssupportpreviousworkindicatingthathigh-qualitya-SiPVmodulesareagoodeconomicvalue.Thepresenceofthelowperformingbrands,however,confirmsaneedformarketinstitutionsthatensurethequalityofallproductssoldinthemarket.Priorworkfrom1999indicatedasimilarqualitypatternamongbrands.Thisconfirmsthepersistentnatureoftheproblem,andtheneedforvigilant,long-termapproachestoqualityassuranceforsolarmarketsinKenyaandelsewhere.Followingthereleaseofour2004/2005testresultsinKenya,theKenyaBureauofStandardsmovedtoimplementandenforceperformancestandardsforbothamorphousandcrystallinesiliconPVmodules.ThisappearstorepresentapositivesteptowardstheinstitutionalizationofqualityassuranceforproductsintheKenyasolarmarket.ElectricalperformanceresultsfromphysicalstresstestingofcommercialPVmodulestotheIEC61215testsequenceSolarEnergyMaterialsandSolarCellsThispaperpresentsstatisticalanalysisofthebehaviouroftheelectricalperformanceofcommercialcrystallinesiliconphotovoltaic(PV)modulestestedintheSolarTestInstallationoftheEuropeanCommission'sJ...
