能源储存课件(英文版)资料讲解

EnergyChemicalBingWangQinghaiUniversity第一页，共18页。1.Whatshouldwedoabouttheenergycrisis?第二页，共18页。EnergysavingRenewableEnergyEnergyStorageenergyefficiencyWhichoneisthemostimportant?第三页，共18页。ChemicalEnergyStorageMagneticEnergyStorage.ThermalEnergyStorage.MechanicalEnergyStorageEnergyStorageSystem(ESS)canbeclassifiedas第四页，共18页。01MechanicalEnergyStorage第五页，共18页。Principle:EnergyisstoredintheformofMechanicalEnergy.Lightweightfibercompositematerialsareusedtoincreaseefficiency.Energydensity=0.05MJ/Kg,η=0.8FlyWheels第六页，共18页。CompressedAirEnergyStorageOperation:Usesoff-peakelectricitytocompressairandstoreitinairtightundergroundcaverns.Whentheairisreleasedfromstorage,itexpandsthroughacombustionturbinetocreateelectricity.Energydensity=0.2~2MJ/Kg,η=0.5

Advantagesanddisadvantages:Faststart-up.Drawback-Geologicalstructurereliance第七页，共18页。PumpedHydroelectricEnergyStorageOperation:Itconsistsoftwolargereservoirslocatedatdifferentelevations.Duringpeakdemand,waterisreleasedfromtheupperreservoir.IfProductionexceedsDemand,waterispumpedupandstoredintheupperreservoir.PumpusedisaCombinedMotorandDynamo.Advantagesanddisadvantages:Mosteffectivewithlargestcapacityofelectricity(over2000

MW).Energydensity=0.001MJ/Kg,η=0.8Geographicaldependence.Thecapitalcostismassive.Soilerosion,landinundation,Siltingofdams.第八页，共18页。02MagneticEnergyStorage第九页，共18页。Principle:Atlow-temperatures,electriccurrentsencounteralmostnoresistance.Storesenergyinthemagneticfield.EnvironmentalfriendlyandHighlyefficient.ReactorSuperCapacitorsPrinciple:Thedistancebetweenthetwochargedlayersisverysmall,resultinginaverylargecapacitanceLongservicelife,quickchargeanddischarge第十页，共18页。03ElectrochemicalEnergyStorage第十一页，共18页。LeadacidBatterylithiumbatteryPrinciple:Theyuseachemicalreactiontodoworkonchargeandproduceavoltagebetweentheiroutputterminals.Energydensityis0.6MJ/Kg.第十二页，共18页。Comparisonofdifferentbatteryenergystoragesystems第十三页，共18页。04ThermalEnergyStorage第十四页，共18页。.Asalthydrateactsasacoolheatsinkfortheairconditionerworkingfluid.Thestoredheatisrejectedfromthesalthydrateduringnighttoheatthesurroundingair.Energydensity=0.25MJ/Kg,η=0.8E.g.:SodiumSulfateDecahydrate第十五页，共18页。Advantages:NogreenhousegasesNotmuchpoliticaldependenceMoreoperatingtime. Disadvantages:StorageofHydrogenduetohighlyinflammablenatureofH2.HighcapitalcostduetoPlatinumcatalystusedintheprocess.FuelCells第十六页，共18页。Whichisbetter???1.Comparingonemethodofenergystoragewithanotherispointless.Thereason-Noneofthemareoptimalforallpurposes2.Flywheelshaveanarrowrangeandarenotananswerforlargescaleoperations.3.Differentstoragemethodsdifferincapacityandmaximumusablestoragetime.

4.ForlargescalestorageUndergroundthermal,pumpedhydroandcompressedairenergystoragesystemsarepreferable.5.Supercon