能源储存课件(英文版).pptx

《能源储存课件(英文版).pptx》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、EnergyChemicalBingWangQinghaiUniversity1.Whatshouldwedoabouttheenergycrisis?EnergysavingRenewableEnergyEnergyStorageenergyefficiencyWhichoneisthemostimportant?ChemicalEnergyStorageMagneticEnergyStorage.ThermalEnergyStorage.MechanicalEnergyStorageEnergyStorageSystem(ESS)canbe

2、classifiedas01MechanicalEnergyStoragePrinciple:EnergyisstoredintheformofMechanicalEnergy.Lightweightfibercompositematerialsareusedtoincreaseefficiency.Energydensity=0.05MJ/Kg,η=0.8FlyWheelsCompressedAirEnergyStorageOperation:Usesoff-peakelectricitytocompressairandstoreitinai

3、rtightundergroundcaverns.Whentheairisreleasedfromstorage,itexpandsthroughacombustionturbinetocreateelectricity.Energydensity=0.2~2MJ/Kg,η=0.5Advantagesanddisadvantages:Faststart-up.Drawback-GeologicalstructurereliancePumpedHydroelectricEnergyStorageOperation:Itconsistsoftwol

4、argereservoirslocatedatdifferentelevations.Duringpeakdemand,waterisreleasedfromtheupperreservoir.IfProductionexceedsDemand,waterispumpedupandstoredintheupperreservoir.PumpusedisaCombinedMotorandDynamo.Advantagesanddisadvantages:Mosteffectivewithlargestcapacityofelectricity(o

5、ver2000 MW).Energydensity=0.001MJ/Kg,η=0.8Geographicaldependence.Thecapitalcostismassive.Soilerosion,landinundation,Siltingofdams.02MagneticEnergyStoragePrinciple:Atlow-temperatures,electriccurrentsencounteralmostnoresistance.Storesenergyinthemagneticfield.Environmentalfrien

6、dlyandHighlyefficient.ReactorSuperCapacitorsPrinciple:Thedistancebetweenthetwochargedlayersisverysmall,resultinginaverylargecapacitanceLongservicelife,quickchargeanddischarge03ElectrochemicalEnergyStorageLeadacidBatterylithiumbatteryPrinciple:Theyuseachemicalreactiontodowork

7、onchargeandproduceavoltagebetweentheiroutputterminals.Energydensityis0.6MJ/Kg.Comparisonofdifferentbatteryenergystoragesystems04ThermalEnergyStorage.Asalthydrateactsasacoolheatsinkfortheairconditionerworkingfluid.Thestoredheatisrejectedfromthesalthydrateduringnighttoheatthes

8、urroundingair.Energydensity=0.25MJ/Kg,η=0.8E.g.:SodiumSulfateDecahydrateAdv