Commontypesofenergyandenergyclassification
[Point]theknowledgeofthecommontypesofenergyare:coal,oil,naturalgas,ethanol,hydrogen,solar,nuclear,wind,electrical,chemical,water,tidalandgeothermal.
Energyclassificationofavarietyofways,differentclassificationcriteria,thesub-categoryisdifferent.Nowmainlydescribesthefollowingfourkinds:
1.Pressrenewableenergyclassifiedas:
(1)renewableenergy.Innature,therearesomeenergycanberecycled,knownasrenewableenergy.Forexample,wind,solar,hydro,biomass,geothermalandoceanenergyandothernon-fossilenergysources.
(2)non-renewableenergysources.Innature,someenergycannotberecycledenergycallednon-renewableenergy(oncetheyareconsumed,itisimpossibleforhundredsandeventhousandsofyearstoregenerate).Forexample,coal,oilandnaturalgasandotherfossilfuels,thisisourplanetcurrentlythemostwidelyusedenergy.
2.Accordingtotheenvironmentalimpactofenergyuseisclassifiedas:
(1)cleanenergy.Inthecourseofenergyontheenvironmentdoesnotcausepollution,knownascleanenergy.Forexample,solarenergy,windenergy,oceanenergy,hydropowerandgeothermal.
(2)non-cleanenergy.Inthecourseofenergyontheenvironmentpollution,knownasnon-cleanenergy.Forexample,coal,oilandnaturalgasandotherfossilfuels.Withthedevelopmentofscienceandtechnology,peoplecanbeanon-cleanenergyclean.Theultimategoalofhumanenergyuseiscarbon-freeeconomy.
3.Accordingtothedegreeofprocessingenergyclassifiedas:
(1)primaryenergy.Existinginnature,unprocessednaturalenergyconversiondirectlycalledprimaryenergy.Forexample,coal,oil,gas,solar,wind,hydro,geothermalandnuclearenergy.
(2)secondaryenergy.Bytheprimaryenergyconversionfromanotherformofenergythatpeopleneedproductscalledsecondaryenergy.Forexample,electricity,gas,steamandvariouspetroleumprodu

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