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1、SolarEnergy&GreenEnergyCourse:SPH4UTeacher:EvaStudent:HuZhenyang(Khalil)Date:Dec.26,2010A)SolarEnergy&Application1)Definition:a)Originateswiththethermonuclearfusionreactionsoccurringinthesun.b)Representstheentireelectromagneticradiation(visiblelight,infrared,ultraviol
2、et,x-rays,andradiowaves).2)Advantages&Disadvantagesa)Advantages1)General:Sunlightcoverseverywhereandtherearenorestrictions.2)Harmless:Developandusesolarenergywon’tpollutetheenvironment.It’soneofthecleanestenergy.3)Huge:Theamountofreachingtotheearth’ssolarenergyisequal
3、to1.3*10^14tonsofcoals4)Foralongtimeb)Disadvantages1)Sundoesnotshineconsistently.2)Solarenergyisadiffusesource.Toharnessit,wemustconcentrateitintoanamountandformthatwecanuse,suchasheatandelectricity.3)Addressedbyapproachingtheproblemthrough:1)collection,2)conversion,3
4、)storage.3)Applicationa)Generateelectricity1)Light-heat-electric:Usesolarcollectortotransferthermalenergytovapors,themusesteamerleadingelectricitygeneratorgenerateselectric.2)Light-electric:Usephotovoltaiceffecttransfersolarenergytoelectricdirectly.(Solarcell)b)Water-
5、heatingsystem1)Twomethodsofheatingwater:passive(nomovingparts)andactive(pumps).2)Inboth,aflat-platecollectorisusedtoabsorbthesun’senergytoheatthewater.1)Thewatercirculatesthroughouttheclosedsystemduetoconvectioncurrents.2)Tanksofhotwaterareusedasstorage.a)Heatinglivin
6、gspace1)Efficientheatingstartswithproperinsulationonexternalwalls,roof,andthefloors.Thedoors,windows,andventsmustbedesignedtominimizeheatloss.2)Collection:south-facingwindowsandappropriatelandscaping.3)Storage:Thermalmass—holdsheat.b)Solarcell1)A solarcell isa solidst
7、ate devicethatconvertstheenergyof sunlightdirectlyinto electricity bythe photovoltaiceffect.Assembliesofcellsareusedtomake solarmodules,alsoknownas solarpanels.Theenergygeneratedfromthesesolarmodules,referredtoas solarpower,isanexampleofsolarenergy.Photovoltaics isthe
8、fieldoftechnologyandresearchrelatedtothepracticalapplicationofphotovoltaiccellsinproducingelectricityfromlight,thoughitisoft
