太阳能空气吸热器及其在太阳能热发电中的应用课件

太阳能空气吸热器及其在太阳能热发电中的应用

SolarairreceiveranditsapplicationinCSPOutlineIntroductionSolarAirReceiverLiteraturereviewTheR&DofSolarairreceiverinChinaThermalcycletestPressuredropInterfacialheattransferExperimentalStudyofaReceiverAmacroscopicmodelConclusion/OutlookAirConcentratedSolarRadiationTsTfTOutlineIntroductionSolarAirReceiverLiteraturereviewTheR&DofSolarairreceiverinChinaThermalcycletestPressuredropInterfacialheattransferExperimentalStudyofaReceiverAmacroscopicmodelConclusion/OutlookAirConcentratedSolarRadiationTsTfTBPIEANBSCReleasedateJun2010Jul2010Feb2010China21.99

22.52

21.32USA21.82

21.70

21.76①

Difference0.78%3.78%-2.02%①TheaverageofIEAandBP’sdata.②Unit:100milliontonsofoilequivalentTable1energyuseofChina&USA

1.IntroductionNo.1energyconsumingcountry！？Solution:SolarenergySolarenergy:PVorCSP?PVCSPEnergyStorageNoteconomicallyviable6-12hpossibleCombinationwithconventionalpowerplantsnoyesDailyEnergypatternMaximumpoweraroundmiddayMaximumpowercanbeextendedtothenightComplexityLimitedamountofdifferentpieces,electricityonlyLargeamountofpieces,electricityandhydraulicsConstructionQuickandFlexible.Componentsreadilyavailable.Gridconnectioncanoccurinseveralsteps.Longandcomplexconstruction.Purchaseofcomponentssometimestakes2yearsOperationRemoteoperation,littlemaintenances.TechnicalStaffneededontheplantforoperationandmaintenanceWaterusagenoDependontheturbineandthecoolingmethod

Table2ComparisonofPVandCSP②Notmuchdifference:Arearequirement,InvestmentcostsandElectricityProductioncosts.②Lecoufle,D.SolarPACES2009:Berlin,Germany.OutlineIntroductionSolarAirReceiverLiteraturereviewTheR&DofSolarairreceiverinChinaThermalcycletestPressuredropInterfacialheattransferExperimentalStudyofaReceiverAmacroscopicmodelConclusion/OutlookAirConcentratedSolarRadiationTsTfTNREL,ETH,DLR,CNRS,WIS……2.1LiteraturereviewProjectYearPowerAbsorberMaterialOutlettemperatureEfficiencySulzerBros.Ltd1987200KWmetallicwirepack550°C65~70%PHOEBUS-TSA1987~2.5MWWiremeshes700°CSulzerBros.Ltd1989Stainlesssteelwiremesh600°C75~85%SandiaNationalLaboratories1990Ceramicfoam700°C60~75%REFOS-SOLGATE1997350KWCeramicfoam800°C75%Solair2000~SiC-honeycombs1000°CJülichTower20081.5MWSiC-honeycombs680°C85%Table3Theairreceiverprototypesintheworld

OutlineIntroductionSolarAirReceiverLiteraturereviewTheR&DofSolarairreceiverinChinaThermalcycletestPressuredropInterfacialheattransferExperimentalStudyofaReceiverAmacroscopicmodelConclusion/OutlookAirConcentratedSolarRadiationTsTfTConcentratedsolarradiationε~0.7-0.85d~1mmT、P、V……Developamodel:Topredictthepressure,temperatureandvelocitydistributionintheabsorber2.2TheR&DofSolarairreceiverinChinaOurworksWorkThermalcycleConvectiveheattransferPressuredropExperimentCFDExperiment&CFDMethodThemaintools:SolarFurnace(Odeillo,France),FLUENTPredictiveModelObjectiveSolarairreceiverExperimentOpticalpropertiesAnti-oxidizationThermo-mechanicalproperties2types：

with/withoutanti-oxidizationcoating2

Tmax：

1250℃，1350℃2.2.1ThermalcycletestWithanti-oxidizationcoatingWithoutanti-oxidizationcoatingThermalcycletimeAbsorptivity“Absorptivity”VS“Thermalcycletime”Result:absorptivity1250℃Withoutanti-oxidizationcoating1350℃With/Withoutanti-oxidizationcoatingResult:SEMTherearemanycorrelationsinliterature:Ergun(1949),DuPlessis(1994),Macdonald(1999),Moreira,2004……Darcylaw:(Re<10)ModifiedDarcylaw:(Re>10)Testrig:2.2.2PressuredropTheproposedmodelComparisonwith:experimentalresultAndothercorrelationsParametricstudy:d,ε,uTsTfThermalNon-equilibrium1.Solarirradianceonsolidsurface(radiationtoheat)Air△T2.Convectiveheattransfer(heatfromsolidtofluid)Ofcourse:2equationsmodelSolarFlux2.2.3InterfacialheattransferInterfacialheattransfercoefficient:Parametricstudy:d,ε,uResultanddiscussionW/(m2K)W/(m2K)W/(m2K)Alltherelationshipsarenon-linear!空气Objective：Thetemperaturedistributionoftheabsorber,anditsinfluencingfactorsThethermalefficiencyofthereceiveranditsinfluencingfactorsPorosity：0.7，0.8Meancellsize：1～2mmThick：25mm，50mm2.2.4ExperimentalStudyofaReceiverTestrigTemperature:frontsurfaceTemperaturehistory6Result:overallefficiencymomentumLTE

LNTEEnergyThreemethods：a、LTE：Rosseland

modelb、LTNE：Rosseland

modelc、LTNE：P1

modelContinuity2.2.5AmacroscopicmodelcouplefluidsolidClosuremodelEffectiveconductivitytensorPorescaleLocalscaleorREVvolueaveragingSolvingtomacroscopicscale:fictivezoneAvg:microscopicscale:dispersedzoneGoverningequationsLTE/LTNERosseland/P1Non-uniformheatfluxUniformheatfluxModelcomparisonOutlineIntroductionSolarAirReceiverLiteraturereviewTheR&DofSolarairreceiverinChinaThermalcycletestPressuredropInterfacialheattransferExperimentalStudyofaReceiverAmacroscopicmodelConclusi