简介:稳固的氧化物燃料房间(SOFC)为海洋的力量系统作为一种有效、干净的其他的选择被识别了。这份报纸在在海洋的操作情形之上基于的SOFC力量系统和它的表演的动态建模上强调。一个SOFC力量系统模型就热力学、电气化学的反应机制而言被提供了。锂离子电池,力量调节单位,栈结构和控制器的子部件集成于模型。系统的动态反应根据它的子部件和控制器的惯性被识别。以稳定的状态和运输时期的整个系统模拟的确认被介绍,有关thermo惯性,控制策略和航海的环境的效果。模拟结果显示出合理精确性与实验室测试作比较。模型能被用来预言一个SOFC力量系统的性能并且当部件参数的部分被调整时,识别系统反应。
简介:为稳固的氧化物的NiO/SDCcomposites和Ni/SDC金属陶瓷造成房间(SOFC)阳极应用程序从氧化镍(NiO)被准备,samaria做了由粉末冶金学的粉末处理的二氧化铈(SDC)。NiO/SDCcomposites和Ni/SDC金属陶瓷的物理、机械的性质,以及微观结构被调查。NiO/SDCcomposites和NiO内容的sintering温度在决定NiO/SDCcomposites的微观结构和性质起一个重要作用,这被显示出,接着,它影响Ni/SDC金属陶瓷的微观结构,电的传导性,和机械性质。Thepresent学习表明了那篇作文并且(进程参数必须适当地被选择优化微观结构,为稳固的氧化物的NiO/SDC材料的性质造成房间应用程序。
简介:Thispaperpresentsanapplicationofiterativelearningcontrol(ILC)techniquetothevoltagecontrolofsolidoxidefuelcell(SOFC)stack.Tomeetthedemandsofthecontrolsystemdesign,anautoregressivemodelwithexogenousinput(ARX)isestablished.Firstly,byregulatingthevariationofthehydrogenflowrateproportionaltothatofthecurrent,thefuelutilizationoftheSOFCiskeptwithinitsadmissiblerange.Then,basedontheARXmodel,threekindsofILCcontrollers,i.e.P-,PI-andPD-typearedesignedtokeepthevoltageatadesiredlevel.SimulationresultsdemonstratethepotentialoftheARXmodelappliedtothecontroloftheSOFC,andprovetheexcellenceoftheILCcontrollersforthevoltagecontroloftheSOFC.
简介:现代先进能源系统普遍具有复杂性和多尺度特性,其模拟研究存在的最大问题是计算代价过高.为了提高计算效率,将非结构化自适应建表法(insituadaptivetabulation,isat)与动力学蒙特卡洛法(kineticsmontecarlo,kmc)相结合,在误差允许的范围内,通过采用近似插值计算代替部分耗时的微观模拟过程,达到减少计算时间的目的.以固体氧化物燃料电池(solidoxidefuelcell,sofc)为例,对其在不同参数条件下氢氧反应过程进行仿真研究.仿真结果表明,在满足精度要求的前提下,所建立起的混合方法相比于单独使用kmc能够有效的缩短计算时间,提高计算效率.
简介:Inco-ionicconductingsolidoxidefuelcell(SOFC),bothoxygenion(O2)andproton(H+)cantransportthroughtheelectrolyte,generatingsteaminboththean-odeandcathode.ThusthemasstransportphenomenonintheelectrodesisquitedifferentfromthatinconventionalSOFCwithoxygenionconductingelectrolyte(O-SOFC)orwithprotonconductingelectrolyte(H-SOFC).Thegenerationofsteaminbothelectrodesalsoaffectstheconcentrationover-potentiallossandfurthertheSOFCperformance.However,nodetailedmodelingstudyonSOFCswithco-ionicelectrolytehasbeenreportedyet.Inthispaper,anewmathematicalmodelforSOFCbasedonco-ionicelectrolytewasdevelopedtopredictitsactualperformanceconsideringthreemajorkindsofoverpotentials.Ohm'slawandtheButler-Volmerformulawereusedtomodeltheionconductionandelectrochemicalreactions,respectively.Thedustygasmodel(DGM)wasemployedtosimulatethemasstransportprocessesintheporouselectrodes.Parametricsimulationswereperformedtoinvestigatetheeffectsofprotontransfernumber(tH)andcurrentdensity(jtotal)onthecellperformance.Itisinterestingtofindthattheco-ionicconductingSOFCcouldperformbetterthanO-SOFCandH-SOFCbychoosinganappropriateprotontransfernumber.Inaddition,theco-ionicSOFCshowssmallerdifferencebetweentheanodeandcathodeconcentrationoverpotentialsthanO-SOFCandH-SOFCatcertaintHvalues.TheresultscouldhelpmaterialselectionforenhancingSOFCperformance.
简介:ThispaperreportstheuseofAufilmstoimprovetheperformanceofthestackedsolidoxidefuelcell(SOFC)basedonthecharacterizationoftheinterfaceandtheadhesionbetweentheelectrodesoftheSOFCsandtheAgpaste.Thespecimensweremanufacturedtoperformtheexperimentasfollows.ASiO2waferwitha300mmnotchwasattachedtotheelectrodesofaSOFCbyaAgpasteandAufilm,whichweredepositedontheelectrodesbysputteringfor1minor5mindepositiontimeandannealedat300Cfor1h.Thefour-pointbendingtestwasperformed,whichresultedintheformationofanextendedcrackatthetiponthewafernotch,andthecrackpropagationwasobservedusingastereomicroscopeequippedwithacharge-coupleddevice(CCD).Consequently,theinterfacialadhesionenergyandtheeffectoftheAufilmbetweentheeachelectrodeandtheAgpastecanbeevaluated.Onthecathode,theinterfacialadhesionenergywithoutAufilmwas2.59J/m2(uppervalue)andtheadhesionenergyincreasedto11.59J/m2(uppervalue)and15.89J/m2(lowervalue)withtheAufilm.Ontheanode,theinterfacialadhesionenergywithoutAufilmwas1.74J/m2(uppervalue),whichincreasedto11.07J/m2(uppervalue)and14.74J/m2(lowervalue)withtheAufilm.Inaddition,theinterfaceareaswereanalyzedbyscanningelectronmicroscopy(SEM)andenergydispersivespectroscopy(EDS)toestimatetheinterfacedelamination.
简介:Inthispaper,anapplicationofanonlinearpredictivecontrollerbasedonaselfrecurrentwaveletnetwork(SRWN)modelforadirectinternalreformingsolidoxidefuelcell(DIR-SOFC)ispresented.Asoperatingtemperatureandfuelutilizationaretwoimportantparameters,theSOFCisidentifiedusinganSRWNwithinletfuelflowrate,inletairflowrateandcurrentasinputs,andtemperatureandfuelutilizationasoutputs.ToimprovetheoperatingperformanceoftheDIR-SOFCandguaranteeproperoperatingconditions,thenonlinearpredictivecontrolisimplementedusingtheoff-linetrainedandon-linemodifiedSRWNmodel,tomanipulatetheinletflowratestokeepthetemperatureandthefuelutilizationatdesiredlevels.SimulationresultsshowsatisfactorypredictiveaccuracyoftheSRWNmodel,anddemonstratetheexcellenceoftheSRWN-basedpredictivecontrollerfortheDIR-SOFC.
简介:采用自蔓延高温合成技术(SHS)制备固体氧化物燃料电池(SOFC)阴极材料La1-xSrxMnO3(LSM);研究成形压力、稀释剂添加量等参数对反应过程及合成产物性能的影响;采用XRD、ICP研究SHS法合成LSM的物相和晶型结构.结果表明:自蔓延高温合成产物为钙钛矿结构菱方晶系La1-xSrxMnO3,Sr含量的变化引起合成产物特征峰的位置和半峰宽变化;随着Sr含量的增加,合成的LSM粉末粒度变细,晶格常数a和c减小.
简介:Strongrestrictionsonemissionsfrommarinepowerplants(particularlySOx,NOx)willprobablybeadoptedinthenearfuture.Inthispaper,acombinedsolidoxidefuelcell(SOFC)andsteamturbinefuelledbynaturalgasisproposedasanattractiveoptiontolimittheenvironmentalimpactofthemarinesector.TheanalyzedvariantofthecombinedcycleincludesaSOFCoperatedwithnaturalgasfuelandasteamturbinewithasingle-pressurewasteheatboiler.ThecalculationswereperformedfortwotypesoftubularandplanarSOFCs,eachwithanoutputpowerof18MW.Thispaperincludesadetailedenergyanalysisofthecombinedsystem.Massandenergybalancesareperformednotonlyforthewholeplantbutalsoforeachcomponentinordertoevaluatethethermalefficiencyofthecombinedcycle.Inaddition,theeffectsofusingnaturalgasasafuelonthefuelcellvoltageandperformanceareinvestigated.Ithasbeenfoundthatahighoverallefficiencyapproaching60%maybeachievedwithanoptimumconfigurationusingtheSOFCsystem.Thehybridsystemwouldalsoreduceemissions,fuelconsumption,andimprovethetotalsystemefficiency.