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ID:50318250
大小:2.17 MB
页数:27页
时间:2020-03-08
《实用科技英语教程 第3版 教学课件 作者 盛楠 Unit 5.ppt》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、Unit5EnergySciencesolarpowernuclearpowerbiomassfossilfuelstidalwindpowerwavewater/hydrogeothermalheatEnergycoalnaturalgasesoilcFreetalkDoyouknowanyenergyweusetoday?nuclearpowerbiomasssolarpowergeothermalheatwindpowerfossilfuelsTask1:Identifytheenergiesthefollowingpicturess
2、tandforandfindouthowtheywork.Howitworks?Amirroredstructuretracksthethroughouttheday,focusingsunlightontoathermalreceiverandenginesystemwhichconvertsittoelectricity.undergroundheatwatertoproducesteam.Wedrillholesdowntothehotregion.Steamcomesupandispurifiedtodriveturbines,wh
3、ichdriveelectricgenerators.Various,canbeusedasrawmaterials.Theywillburninananaerobicenvironmenttogeneratevariousbiogases,whichcanbeusedasfuelforgasgenerators,thustogetthefinalelectricity.Recentyearshaveseenanewgenerationoflarge,highwithtwoorthreeimmenseandrelativelyslow-mo
4、vingblades.Thewindblowsthepropellerbladesround,whichturnsageneratortoproduceelectricity.Aparticulartechnologyisrequiredto.Allcurrentmethodsinvolveheatingaworkingfluidsuchaswater,whichisthenconvertedintomechanicalworkforthepurposeofgeneratingelectricityorpropulsion.Theyare
5、currentlythemosteconomically availablesourceofpowerforbothpersonalandcommercialuses. Theymusttoproducesignificantamountsofenergy.sunHotrockshusks,straw,wooddust,canetrashwindextractusableenergybeburned阅读技巧训练---寻找关键词solarpowergeothermalheatbiomasswindpowerfossilfuelsnuclear
6、powerQuestionWhatisthemainenergyweusetoday?(bothindustrial&household)Petroleum/oilNaturalgasCoalFossilfuels化石燃料矿物燃料Task2:DiscussionAdvantagesRenewable/unlimitedsupplysustainableclean/noorlesspollution/greensafe/securebringeconomicbenefitsDisadvantagesLessefficiency/ineffic
7、ientcostlytobuildunreliablelargecoverageoflandTheAdvantagesandDisadvantagesoftheRenewableEnergiesWordPuzzleFEATURESSECUERNEWABLEUNRELIBLECOSLYRESABLEINEFICIENTCLANINEXHAUTIBLEAssignmentTask3:CompoundDictationCoal-firedPowerPlantsTheinventionoftheincandescentlightbulbbyThom
8、asA.Edisonin1879createdademandforacheap,readilyavailablefuelwithwhichtogeneratelargeamoun
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