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ESPTaskPackage3SolarradiationonEarthisverylarge,about40minutesofsolarIrradiationonearth.It'ssufficientforpeopleallovertheworlduseforoneyear.Solarenergyisinexhaustible.Solarpowerisabsolutelyclean,andthereisnoharm.Sosolarpowerisanidealsourceofenergy照射在地球上的太阳能非常巨大，大约40分钟照射在地球上的太阳能，足以供全球人类使用一年。太阳能是取之不尽、用之不竭的。而且太阳能发电绝对干净，不产生危害。所以太阳能发电是理想的能量来源。SolarpowersystemconsistsofSolarbatteries太阳能电池组Solarcontroller太阳能控制器Storagebattery蓄电池Inverter逆变器Solarcontroller(太阳能控制器):controltheentiresystemstate,playaroleofbatterychargeprotection,overdischargeprotection(过充电保护).Intheplaceoflargetemperaturedifference(温差较大)，theControlleralsohasthefunctionoftemperaturecompensation(补偿).Battery(蓄电池):StoretheenergyIssued(发出的能量)bythesolarpanelsandreleased(释放)whenneeded.Inverter(逆变器):ChangetheDCenergyIssuedbythesolarpowersystemintoACenergy.组成及作用Solarpanel(太阳能电池板):Core(核心),Itwillchangethesun‘sradiation(放射、照射)energyintoelectricalenergyWhenthesurfaceofsolarcellsexposedtolight,thepartofthephotonabsorbed(吸收)bysiliconmaterial(硅材料);photon'senergytransfertothesiliconatom(原子),Theelectronelectronictransition(跃迁)andbecomeafreeelectron,onbothsidesofP-Njunction-N结)agglomeration(集聚)andformed(形成)apotentialdifference(电位差),whentheexternalaccessthroughthecircuit(电路),undertheeffectofthevoltage,Therewillbeacurrentflowthroughtheexternalcircuitandproduceaoutputpower.Theessence(本质)ofthisprocess:photonenergyintoelectricalenergy.(Photovoltaiceffect光伏效应)基本原理英文版Disadvantages(1)Thedensityofradiationissmall,buttakeupahugearea(2)Gettingenergyisrelatedtotheweather(3)Instabilities(4)Lowefficientandhighcost照射的能量分布密度小，即要占用巨大面积获得能源与天气有关不稳定性：效率低和成本高优点Advantages①Noriskofdepletion②Absolutelyclean③Unrestrictedusage④Highqualityenergy⑤Priceacceptable⑥Time-savingA.无枯竭危险B.绝对干净C.使用不受限制D.能源质量高E.使用者容易接受F.节省时间Asearlyas1980,NASAandtheDepartmentofEnergyhaveaproposedideas,that'stobuildingasolarpowerstationsinspace,早在1980年美国宇航局和能源部就提出在空间建设太阳能发电站设想，准备在同步轨道上放一个长10公里、宽5公里的大平板，上面布满太阳电池，这样便可提供500万千瓦电力。但这需要解决向地面无线输电问题。Theywanttoputinthesynchronousorbitalargeplatewhichwouldbe10kminlengthand5kminwidth,coveredwithsolarcells,Itwillprovide500millionkilowattsofelectricity.Butthisneedtosolvetheterrestrialwirelesstransmissionproblems.1.我们正在研究新能源的应用。2.可使用的新能源其实有很多。TranslateandReadWeareresearchingtheutilizationofnewenergy.Therearemanynewenergyresourcesavailable.3.大多数新能源都是用之不尽的，比如说风能、太阳能、水能等等。4.中国的宁夏省有丰富的地热能。TranslateandReadMostofnewenergiesarewasteless,suchaswindenergy,solarenergy,waterenergyandsoon.NingxiaprovinceofChinaisrichingeothermalenergy.5.生物质能是一种由生物质产生的能量。6.生物质能是可再生的。TranslateandReadThebioenergyisakindofenergythatisgeneratedbybiomass.Thebioenergyisrenewable.•太阳能发电•水力、风力发电•地热发电•生物质能发电TypesoftheGenerationbyGreenEnergySourcesSolarPowerGenerationWaterandWindPowerGenerationGeothermalPowerGenerationBiomassEnergyGenerationListen&LearnEmily:Toacquire_______fromsolarenergy,weneedrealizethe_________________conversionthroughsolar________.Its____________principlediffersfromotherresources’completely.Lily:Couldyoutellusindetail?Emily:Ithasuniquecharacteristicssuchasnoriskof_____________,absolute____________,unlimitedgeographical____________,generating____________nearbytheconsumerandsoon.powerListenandCompletelight-to-currentbatterygeneratingexhaustingcleannessdistributionelectricity•光电变换•太阳电池•发电原理•无枯竭风险•不受资源分布地域的限制•在用电处就近发电LearnandRepeatLoudlylight-to-currentconversionsolarbatterygeneratingprinciplenoriskofexhaustingunlimitedgeographicaldistributiongeneratingelectricitynearbytheconsumer