外文文献原文.pdf_第1页
外文文献原文.pdf_第2页
外文文献原文.pdf_第3页
外文文献原文.pdf_第4页
外文文献原文.pdf_第5页
已阅读5页,还剩10页未读 继续免费阅读

外文文献原文.pdf.pdf 免费下载

版权说明:本文档由用户提供并上传,收益归属内容提供方,若内容存在侵权,请进行举报或认领

文档简介

HIGHLIGHTSHYDROGENFORPERFORMANCEPRINCIPLEBASEDWITHCHARGEANDTOTALTRIPLENGTHFORECASTASAFUNCTIONOFAMOVINGAVERAGEOFPASTCYCLESPEEDTHESTRATEGYWEPROPOSEAIMSATACHIEVINGAREALTIMESUBROADTRANSPORTATIONAND,PARTICULARLY,ROADVEHICLESARENOWAINNOVATIVESOLUTIONS,AIMEDATREDUCINGCOSTSANDEMISSIONS2ELECTRICVEHICLESEVSARESTILLTOOFARFROMBEINGAVALIDSOLUTIONFORTHEPROBLEM,BOTHFORREDUCEDDRIVINGRANGEANDLONGCHARGINGTIMEPROMISINGSOLUTIONSALREADYWIDELYPROPOSEDANDANALYZEDAREPLUGINHYBRIDELECTRICVEHICLESPHEVS,CHARACTERIZEDBYVEHICLESFCVS,WHICHGENERALLYMAKEUSEOFPOLYMERELECTROLYTEOFFURTHERRANGEWITHOUT5INFACT,COMPAREDTOICEPROPELLEDVEHICLES,BOTHCONVENTIONALORELECTRICONES,FCVSARE,LOCALLY,ZEROEMISSIONVEHICLESAND,INCIPLE,IFTHEFUELINGHYDROGENCOULDBEDERIVEDFROMRENEWABLEENERGYSOURCES,THESEVEHICLESCOULDALLOWFORZEROPOLLUTANTEMISSIONSALSOATAGLOBALLEVELTHEREFORE,THESEVEHICLESCANGIVEAVALIDCONTRIBUTIONTOMAKETHETRANSPORTATIONSUSTAINABLEINTHELONGTERMANDGOVERNMENTSARESTRONGLYSTRIVINGTOWARDSTHESESOLUTIONS6,7NONETHELESS,EVENBEINGARELATIVELYMATURETECHNOLOGY,THEREARESTILLSOMEDISADVANTAGESRELATEDTOTHEUSEOFFUELCELLSFORVEHICLES,SUCHASHIGHCOSTS,LOWPOWERDENSITY,ANDLACKOFCORRESPONDINGAUTHOREMAILADDRESSESLAURATRIBIOLIUNICUSANOITLTRIBIOLI,RAFFAELLOCOZZOLINOUNICUSANOITRCOZZOLINO,DANIELECHIAPPINIUNICUSANOITDCHIAPPINI,PAOLOIORAUNIBSITPIORAAPPLIEDENERGY1842016140154CONTENTSLISTSAVAILABLEAPPLIEDSEVIDAYSPROVEDTOBEONEOFTHEMAINCONTRIBUTORSTOPOLLUTANTANDGLOBALGREENHOUSEGASEMISSIONS1THIS,TOGETHERWITHTHERISINGOFFUELPRICE,ISSTRIVINGTHEAUTOMOTIVESECTORRESEARCHTOWARDSMEMBRANEFUELCELLSPEMFCS,WITHTHEPOSSIBILITYREDUCINGPOLLUTANTEMISSIONS,GIVINGASATISFACTORYTHENEEDOFANINTERNALCOMBUSTIONENGINEICEHTTP/DXDOIORG/101016/JAPENERGY20161001503062619/C2112016ELSEVIERLTDALLRIGHTSRESERVEDWHENHYBRIDPRINKEYWORDSENERGYMANAGEMENTHTPEMFCONBOARDFUELPROCESSORPONTRYAGINSMINIMUMPRINCIPLEADAPTIVECONTROLLEROPTIMALSOLUTIONOFTHECONTROLPROBLEMWHICHISCASTINTOTHEMINIMIZATIONOFTHECONSUMEDFUELTHEVEHICLEISALSOEQUIPPEDBYANAUTOTHERMALREFORMERAND,INORDERTOMINIMIZETHEHYDROGENBUFFERSIZE,THECONTROLALGORITHMISSUBJECTTOCONSTRAINTSONTHEMAXIMUMHYDROGENBUFFERLEVELACOMPARATIVEANALYSISOFTHEPROPOSEDSTRATEGYAGAINSTTHEOPTIMALONEISCONDUCTEDANDRESULTSAREREPORTEDTHEOBTAINEDFUELCONSUMPTIONSAREALSOCOMPAREDTOTHOSEOBTAINEDBYTHESAMEVEHICLE,POWEREDBYANINTERNALCOMBUSTIONENGINEANDBYAPLUGINHYBRIDELECTRICPOWERTRAINC2112016ELSEVIERLTDALLRIGHTSRESERVED1INTRODUCTIONHIGHOVERALLEFFICIENCY,SHORTTRANSIENTS,LONGRANGEANDLOWROADLOADDEPENDENCY3,4THESAMEADVANTAGESAPPLYFORFUELCELLAVAILABLEONLINE12OCTOBER2016INFORMATIONONTHESTATEOFINFORMATIONABOUTTHEDRIVINGC15MODELBASEDSIMULATORFORENERGYMANAGEMENTC15FUELPROCESSOROPTIMIZATIONFORONBOARDC15ELECTROCHEMICALMODELOFAHTPEMFCC15DESIGNOFREALTIMEPONTRYAGINSMINIMUMC15RESULTSCOMPARISONAGAINSTTHESAMEVEHICLEARTICLEINFOARTICLEHISTORYRECEIVED22APRIL2016RECEIVEDINREVISEDFORM9SEPTEMBER2016ACCEPTED2OCTOBER2016OFPARALLELFUELCELL/BATTERYVEHICLEPRODUCTIONANDSTORAGECURVESDETERMINATIONADAPTIVECONTROLLERCONVENTIONALANDHYBRIDPOWERTRAINABSTRACTTHISPAPERDESCRIBESTHEENERGYMANAGEMENTCONTROLLERDESIGNOFAMIDSIZEDVEHICLEDRIVENBYAFUELCELL/BATTERYPLUGINHYBRIDPOWERTRAIN,WHEREANEXPERIMENTALLYVALIDATEDHIGHTTEMPERATUREPOLYMERELECTROLYTEMEMBRANEFUELCELLMODELISUSEDTHEPOWERMANAGEMENTSTRATEGYISDERIVEDBYTHEAPPLICATIONOFTHEPONTRYAGINSMINIMUMPRINCIPLE,WHERETHECONTROLPARAMETERISADAPTEDBYUSINGFEEDBACKADEPTOFINDUSTRIALENGINEERING,UNIVERSITDIROMANICCOLCUSANO,ITALYBDEPTOFMECHANICALANDINDUSTRIALENGINEERING,UNIVERSITDIBRESCIA,ITALYENERGYMANAGEMENTOFAPLUGINFUELCELL/BATTERYONBOARDFUELPROCESSINGLAURATRIBIOLIA,RAFFAELLOCOZZOLINOA,DANIELECHIAPPINIJOURNALHOMEPAGEWWWELHYBRIDVEHICLEWITHA,PAOLOIORABATSCIENCEDIRECTENERGYERCOM/LOCATE/APENERGYPROVIDING100OFVEHICLETRACTIONPOWERNEVERTHELESS,THECOOPERATIONWITHANENERGYSTORAGESYSTEM,SUCHASABATTERY,CANENERGYHYDROGENINFRASTRUCTURES6THELATTERISSUECOULDBESOLVEDBYUSINGANONBOARDFUELPROCESSORFORONSITEHYDROGENPRODUCTIONFROMHYDROCARBONFUELSTHISSOLUTIONHASBEENOFTENINVESTIGATEDFORTHEUSEOFHYDROGENENRICHEDFUELDIRECTLYININTERNALCOMBUSTIONENGINES8,9EARLYPROTOTYPESFORFUELPROCESSORSTOBEUSEDDIRECTLYINVEHICLESWEREOBTAINEDBYSCALINGDOWNALREADYEXISTINGINDUSTRIALTECHNOLOGIESINTHISCASE,GASOLINE,ETHANOLANDOTHERAUTOMOTIVEFUELSCOULDBESUCCESSFULLYPROCESSED,BUTTHEPROTOTYPESSTILLREQUIREDVOLUMEANDMASSNOTSUITABLEFORAUTOMOTIVEAPPLICATIONSINTHEUS,ON2004,THESEISSUESANDTHECOMPETITIONWITHMOREMATURETECHNOLOGIES,SUCHASGASOLINE/BATTERYHYBRIDVEHICLES,HAVECONVINCEDTHEDOEONBOARDFUELPROCESSINGGO/NOGODECISIONTEAMTOTERMINATETHERESEARCHONONBOARDFUELPROCESSINGFORFCVS10INEUROPE,INTHEEARLY2000S,DAIMLERCHRYSLERSTARTEDTESTINGMETHANOLPROCESSORSFORTHEFUELINGOFFUELCELLVEHICLEPROTOTYPESNECAR5,BASEDONTHEACLASSMERCEDESDESIGN,WASTHELASTLAUNCHEDPROTOTYPE,WHICHUSEDA75KWBALLARDFUELCELLSHOWINGIMPRESSIVEPERFORMANCE11IN2004,RENAULT/NUVERAPRESENTEDAFOURYEARPROJECTFORAFUELPROCESSORFORONBOARDHYDROGENPRODUCTIONSMALLENOUGHANDPOWERFULENOUGHFORUSEONAVEHICLE,BUTALSOTHISPROGRAMENDEDIN2008WITHNOFURTHERDEVELOPMENTS12INTHESEEARLYPROJECTS,ONBOARDFUELPROCESSINGHADBEENCONSIDEREDFORFUELCELLSPROVIDING100OFVEHICLETRACTIONPOWER,WITHREFORMERSIZEANDSYSTEMCOSTSWHICHMADETHISSOLUTIONUNWORTHYAFTERWARDS,ONBOARDFUELPROCESSINGWASINVESTIGATEDAGAINFORCOUPLINGWITHFUELCELLSUSEDASAUXILIARYPOWERUNITSAPUSINFACT,WHENAFUELCELLISUSEDASAPU,ITSPOWERISREDUCED,THESYSTEMCANBEMORECOMPACTANDHYDROGENSTORAGEUNITISNOTREQUIREDTECHNOLOGICALFEATURESANDCHALLENGESOFONBOARDREFORMINGOFHEAVYHYDROCARBONFUELSTOFEEDSOLIDOXIDEFUELCELLSSOFCSASAPUSHAVEBEENSUMMARIZEDBY13,UNDERLININGTHEBENEFITSOFAUTOTHERMALREFORMINGATROVERPARTIALOXIDATIONPOXANDSTEAMREFORMINGSRATRHASBEENAGAINCOUPLEDTOSOFCSBY14,WHOEVALUATEDTHEEFFECTOFOFFGASRECYCLEONOVERALLSYSTEMEFFICIENCYALBEITTHELOWEREFFICIENCYANDPOORERFUELQUALITY15,ATRISRECOGNIZEDTOBETHEBESTSOLUTIONFORTRANSPORTATIONAPPLICATIONSINFACT,REACTIONSARECONSIDEREDTOBETHERMALLYSELFSUSTAINING,ANDTHEREFORE,THEYDONOTPRODUCEORCONSUMEEXTERNALTHERMALENERGY,UNLIKEPOXORSRINTHEAUTOMOTIVESECTOR,THOUGH,POLYMERELECTROLYTEMEMBRANEFUELCELLSAREPREFERREDTOSOFCSBEINGMORERELIABLEANDHAVINGFASTERTRANSIENTSONBOARDFUELPROCESSINGFORANAPUBASEDONALOWTEMPERATUREPOLYMERELECTROLYTEMEMBRANEFUELCELLLTPEMFCHASBEENINVESTIGATEDBY16HOWEVER,THESEDEVICESAREAFFECTEDBYCOPOISONING15,1719ANDREQUIREHIGHPURITYHYDROGEN,WHICHCANASKFORMORETHANONEWATERGASSHIFTUNITSANDFORAPREFERENTIALOXIDATIONREACTORORSEPARATIONMEMBRANESSUCHACOMPLEXANDSPACECONSUMINGSYSTEMISRATHERUNSUITABLEFORAPPLICATIONSLIKESMALLORMEDIUMSIZECARSINSTEAD,HIGHTEMPERATUREPEMFUELCELLSHTPEMFCSAREMORETOLERANTTOCARBONMONOXIDEANDMAYCOPEWITHANINCREASEDCOLEVELINTHESYNGAS20,AVOIDINGTHENEEDOFWATERGASSHIFTUNITSANDPREFERENTIALOXIDATIONREACTORHTPEMFCSCANALSOBEOPERATEDWITHOUTEXTERNALGASHUMIDIFICATIONFURTHERSIMPLIFYINGSYSTEMCOMPLEXITYANDMANAGEMENTANDHAVETHEADVANTAGEOFAMOREEFFICIENTHEATDISSIPATIONANDOFABETTERINTEGRATIONINTHESYSTEMTHERMALMANAGEMENT21MOREOVER,THEINCREASEDELECTRODEKINETICSRESULTINGFROMTHEHIGHEROPERATINGTEMPERATURESALLOWUSINGALTERNATIVECATALYSTSFORTHEELECTRODES,THUSREDUCINGCOSTS22THERESULTISASIGNIFICANTREDUCTIONINSYSTEMCOMPLEXITY,SIZEANDCOSTANEXTENSIVEREVIEWOFHTPEMFCBASEDAUXILIARYPOWERUNITSHASBEENPROPOSEDBY22FORDIESELPOWEREDROADVEHICLES,SHOWINGTHEIRGREATPOTENTIALLTRIBIOLIETAL/APPLIEDBESIDETHESEAPPLICATIONS,RECENTDEVELOPMENTSINAUTOTHERMALREACTORSAREJUSTIFYINGTHECOMEBACKTOTHEUSEOFONBOARDPROCESSORSINVEHICLESWHERETHEFUELCELLISUSEDFORTRACTIONPURPOSESREDUCETHEFUELCELLSIZEAND,CONSEQUENTLY,THEREFORMERSIZEFUELCELLSIZECANBEFURTHERREDUCEDBYEMPLOYINGAPLUGINSOLUTION,WHICHGIVESTHEPOSSIBILITYOFCHARGINGTHEBATTERYBYMEANSOFANEXTERNALSOURCE,EXTENDINGITSOPERATINGRANGEHOWEVER,THEREALBENEFITSOFSUCHASOLUTIONCANONLYBEEMPHASIZEDWITHAPROPERENERGYMANAGEMENTOFALLTHEINVEHICLEPOWERSOURCES25SEVERALENERGYMANAGEMENTCONTROLSTRATEGIESHAVEBEENALREADYPROPOSEDFORFUELCELLVEHICLE,SUCHASHEURISTICSTRATEGIES2628,EQUIVALENTCONSUMPTIONMINIMIZATIONSTRATEGYECMS29,30ANDSTRATEGIESBASEDONOPTIMALCONTROLTHEORY3135NONETHELESS,THESEANALYSESAREALLAPPLIEDTOFUELCELLVEHICLESWITHHYDROGENPRODUCEDOFFLINEANDSTOREDONBOARD,WHILETHEENERGYMANAGEMENTOFVEHICLESWITHONBOARDFUELPROCESSINGISUSUALLYBASEDONOPERATIONOFTHEFUELCELLATCONSTANTPOWER,DERIVEDFROMTHESTANDALONEOPTIMIZATIONOFTHEATR/FCSYSTEMEFFICIENCYASYSTEMEFFICIENCYOF251HASBEENEVALUATEDFORAMETHANOLBASEDONBOARDREFORMERFORPEMFUELCELLBY23,WHILE36OBTAINEDASYSTEMEFFICIENCYUPTO41,FORAFUELCELLSYSTEMWITHAUTOTHERMALETHANOLREFORMEREVENCLAIMINGTHEPOSSIBILITYOFUSINGTHESYSTEMONVEHICLE,THOSERESULTSWEREOBTAINEDWITHASTANDALONESYSTEMALSOIN24,ASTANDALONEHYDROGENPRODUCTIONUNITFROMREFORMINGOFETHANOLFORLTPEMFCISSIMULATEDFORONBOARDPURPOSESTHEREISNOEVIDENCEOFSTUDIESONTHEENERGYMANAGEMENTOFFUELCELLVEHICLESWITHANONBOARDPROCESSORANDVARIABLEFUELCELLLOADCONSTRAINTSDERIVEDFROMTHEHYDROGENAVAILABILITYMUSTBECONSIDEREDINTHEENERGYMANAGEMENTINTHISCASEINTHISPAPER,THEDESIGNOFACONTROLLERFORTHEENERGYMANAGEMENTOFAPARALLELFUELCELL/BATTERYVEHICLEWITHANONBOARDFUELPROCESSORISPROPOSEDTHEAPPLICATIONISAVEHICLEEQUIPPEDBYANAUTOTHERMALREFORMERPRODUCINGASYNGASFROMISOOCTANE,CONSIDEREDASGASOLINESURROGATEASPENPLUSTMHASBEENUSEDFORTHEFUELPROCESSORMODELING,INORDERTOFINDTHEOPERATINGPOINTWHICHMAXIMIZESTHECONVERSIONEFFICIENCYANDPROPERLYEVALUATESTHESYNGASCOMPOSITIONTHEFUELCELLISAHTPEMFC,WHOSEPERFORMANCEASAFUNCTIONOFTHESYNGASCOMPOSITIONHAVEBEENCAREFULLYEVALUATEDBYMEANSOFASELFMADESEMIEMPIRICALCODE,REALIZEDBYTHEAUTHORSANDPRESENTEDIN37,38ASTHEFUELCELLLOADCANVARY,THEFUELPROCESSORCANNOTSATISFYTHEHYDROGENDEMANDINREALTIMEAND,THEREFORE,ASYNGASBUFFERISPLACEDBETWEENTHEFUELPROCESSORANDTHEFUELCELLTHESTRATEGYDERIVESFROMTHEAPPLICATIONOFTHEFRAMEWORKPROPOSEDIN39TOFUELCELLVEHICLESANDCONSIDERSTHEDYNAMICOFTHESYNGASBUFFERANDTHECONSTRAINTSDERIVEDFROMTHEHYDROGENAVAILABILITYMOREOVER,THEADAPTATIONLAWPROPOSEDINTHEPREVIOUSALGORITHMHASALSOBEENIMPROVEDBYUSINGTHEINFORMATIONONTHEDRIVINGCYCLEAVERAGESPEED,AVERAGEDONPASTDRIVINGCONDITIONS,FORPATTERNTYPOLOGYRECOGNITIONINORDERTODEMONSTRATETHEEFFECTIVENESSOFTHEPROPOSEDALGORITHM,ACOMPARATIVEANALYSISOFTHEALGORITHMAGAINSTTHEOPTIMALONEISCONDUCTEDANDMAINRESULTSAREREPORTEDTHEMODELHASBEENVALIDATEDBYCOMPARINGTHERESULTSTOTHEFUELCONSUMPTIONOFTHEORIGINALCONVENTIONALVEHICLE,NAMELYTHECHEVROLETMALIBU,ANDTOAPLUGINHYBRIDELECTRICPOWERTRAINIMPLEMENTEDONTHESAMEVEHICLECHASSISINAPASTWORK402VEHICLEMODEL23,24INPARTICULAR,ASMENTIONEDABOVE,EARLYPROJECTSFAILEDBECAUSETHEYFOCUSEDONTHEONBOARDFUELPROCESSINGFORFUELCELLS1842016140154141THESIMULATORUSEDFORTHESTUDYISAQUASISTATICFORWARDLOOKINGSIMULATOR,DEVELOPEDINMATLABSIMULINKANDDERIVEDFROMAPASTSTUDY40THEDRIVERMODELISBASEDONAPIDCONTROLLER,THATCOMPARESTHEACTUALVELOCITYOFTHEVEHICLEWHICHISACONSEQUENCEOFTHEEQUILIBRIUMBETWEENTHETORQUEDELIVEREDBYTHEPOWERTRAINTOTHEWHEELSANDTHERESISTANCESTOTHEVEHICLEAERODYNAMICRESISTANCEANDROADSLOPETHEMAINPARAMETERSUSEDEQUIVALENTVEHICLEMASSISINVOLVEDTOTAKEINTOACCOUNTTHEROTAPOWERDIRECTLYTOTHEELECTRICMOTORORTOTHEBATTERYAND,IFREQUIRED,THEBATTERYANDTHEFCCANPROVIDEPOWERTOTHEFRONTTEMPERATUREWATERSHIFTREACTORWGSRINWHICHCOREACTSWITHH2OH2ANDCO2ARETHEPRODUCTSCONSIDEREDC15HEATRECOVERYLINESINCETHETHERMALEFFICIENCYOFTHEFUELPROCESSORUNITDEPENDSSTRONGLYONREACTANTSPREHEATINGTEMPERATURES,ASREPORTEDIN42,AHEATRECOVERYLINEISDEFINEDBYCOOLINGTHESYNGASSTREAMTEMPERATUREINTWOHEATEXCHANGERSINPARTICULAR,THEWATERANDISOOCTANEREQUIREDBYTHESTEAMREFORMINGREACTIONAREPREHEATEDINHEX2BYCOOLINGTHESYNGASSTREAM,ANDTHENHEATEDINTHEHEX1THEOXYGENSENTTOTHEAUTOTHERMALREACTORISALREADYHEATEDUPTO351C176CASTHEMEMBRANESEPARATIONPROCESSREQUIRESCOMPRESSEDAIRAT10BAR,ANDTHECOMPRESSIONHEATSTHEOXYGENC15SEPARATIONUNITSEP1MEMBRANESEPARATIONUNITWHERETHEPUREOXYGENISPRODUCEDHERETHEAIRISCOMPRESSEDUPBYC1TO10BARANDTHENTHROUGHTHEMEMBRANETHEOXYGENISSEPARATEDFROMNITROGENWITHA95REMOVALEFFICIENCY43C15INTERREFRIGERATEDCOMPRESSIONLINEIRCLLASTSTAGEOFTHESYNGASPRODUCTIONLINETHISISEQUIPPEDWITHTHREECOMPRESSORSANDTWOHEATEXCHANGERSANDITISNEEDEDINORDERTOINCREASETHESYNGASPRESSUREUPTOTHEHYDROGENBUFFERPRESSURE,IE250BAR,REPRESENTEDASICCOMPRESSIONSECTIONINFIG3142LTRIBIOLIETAL/APPLIEDENERGY1842016140154MOTOR,TOGETHERTHEFRONTMOTORISAGVM210150PERMANENTMAGNETELECTRICMACHINEANDHASBEENMODELEDBYMEANSOFITSEFFICIENCYMAP,DEPICTEDINFIG2,ANDOTHERPERFORMANCEDATAAVAILABLEFROMTHEMANUFACTURER41THEPOWERTRAINSPECIFICATIONSARELISTEDINTABLE2UNLIKE40,WHERETHEFUELCELLWASALTPEMFC,NOWTHESTACKISCOMPOSEDBY325CELLSINSERIES,EACHOFANEFFECTIVEAREAOF120CM2ASTORAGEBUFFERISPLACEDBETWEENTHEATRANDFCSTACK,WHERETHEHYDROGENPRODUCEDBYTHEATRISSTOREDTOBEUSEDBYTHEFUELCELLWHENITISREQUIREDTHISWAY,THEATRCANWORKATAFIXEDOPTIMIZEDOPERATINGPOINTTHEATRHASBEENPROPERLYMODELEDINORDERTOEVALUATETHEISOOCTANEDERIVEDSYNGASCOMPOSITIONANDTHEMODELISDESCRIBEDINSECTION21AFTERWARDS,AZERODIMENSIONALELECTROCHEMICALMODELOFAHTPEMFC,PROPOSEDIN37,38ANDBRIEFLYDESCRIBEDINSECTION22,MAKESUSEOFTHEOBTAINEDSYNGASCOMPOSITIONFORTHEDETERMINATIONOFTHEFCSTACKEFFICIENCYANDTHEVOLTAGECURRENTDENSITYCURVEFORASINGLECELL21ATRMODELTHEAIMOFTHISSECTIONISTODEFINETHEOPERATINGCONDITIONSTHATMAXIMIZETHEEFFICIENCYOFATRBASEDFUELPROCESSORFEDBYISOOCTANEASPENPLUSTMHASBEENUSEDFORTHEFUELPROCESSORMODELING,INORDERTOFINDTHEOPERATINGPOINTWHICHMAXIMIZESTHECONVERSIONEFFICIENCYTHEGENERALREFORMINGREACTIONMECHANISMCANBEWRITTENASC8H18AH2OCO2377CN2PRODUCTS1WHEREAANDCARETHESTOICHIOMETRICCOEFFICIENTSOFWATERANDAIRRESPECTIVELYTHEONLYPRODUCTSCONSIDEREDINTHEGLOBALREACTION1AREH2COCO2CH4CSANDH2OINORDERTOOBTAINMAXIMUMHYDROGENPRODUCTION,THEREFORMINGREACTIONHASTOBECARRIEDOUTINTWOSTEPSTABLE1MAINPARAMETERSFORVEHICLEDYNAMICSCALCULATIONSTIONALINERTIAOFALLTHECOMPONENTSOFTHEDRIVELINEANDISAPPROXIMATIVELYESTIMATEDINANINCREASEOF10OFTHEOVERALLVEHICLEMASS,EVALUATEDFROMTHEMAINCOMPONENTSMASSESANDTHECARSHELLANDFRAMETHEFCVPOWERTRAIN,SKETCHEDINFIG1,CONSISTSOFAHTPEMFC,ADC/DCCONVERTERANDALIION105S2PBATTERYPACK,LINKEDTOGETHERTOANELECTRICMOTORBYMEANSOFADC/ACINVERTERTHANKSTOTHESPECIFICEFFICIENCYMAP,THEMOTORCANBEDIRECTLYLINKEDTOTHEFRONTWHEELSWITHOUTANYTRANSMISSIONRATIOTHEFCSUPPLIESFORTHEVEHICLEDYNAMICSCALCULATIONSAREGIVENINTABLE1ANMOTIONWITHTHEDESIREDVELOCITYTHECONTROLLEROUTPUTSTHEACCELERATORORTHEBRAKEPEDALPOSITION,WITHTHESIMULATORCHOOSINGTHEFIRSTORTHESECONDIFTHETORQUEATTHEWHEELSISPOSITIVEORNEGATIVETHEACTUALVEHICLESPEEDISCOMPUTEDBYSOLVINGTHELONGITUDINALVEHICLEDYNAMICS,WHICHTAKESINTOACCOUNTALLTHERESISTANCESTOTHEVEHICLEMOTION,SUCHASROLLINGRESISTANCEATTIRES,CURBWEIGHTFRONTALAREADRAGCOEFFICIENT1500KG2M2035C15HIGHTEMPERATURESTEPREFORMINGREACTION,INWHICHISOOCTANEISCONVERTEDINTOAGASEOUSMIXTUREOFH2COCO2CH4CSANDUNREACTEDH2OC15LOWTEMPERATURESTEPWATERGASSHIFTREACTION,INWHICHCOISREACTEDWITHH2OTOWARDSH2ANDCO2THEMAINCOMPONENTSOFTHEPROCESS,REPRESENTEDINFIG3,AREC15AUTOTHERMALREACTORATRREFORMINGREACTORINWHICHTHEISOOCTANEISCONVERTEDINTOAGASEOUSMIXTUREOFH2COCO2,ANDH2OTHEATRISFEDBYISOOCTANE,STEAMANDOXYGENANDITISMAINTAINEDUNDERADIABATICCONDITIONSC15WATERGASSHIFTREACTORWGSRWATERGASSHIFTREACTORLOWFIG1VEHICLEPOWERTRAINSCHEMATICROLLINGRESISTANCECOEFFICIENTWHEELRADIUS001302MENERGY5010015020025001502025030450606507075080808508509095LTRIBIOLIETAL/APPLIEDDUETOTHECOMPLEXITYOFTHEREACTIONSYSTEM,THETHERMODYNAMICEQUILIBRIUMANALYSISISDETERMINEDBYTHENONSTOICHIOMETRICAPPROACH15INTHISAPPROACHTHEEQUILIBRIUMCOMPOSITIONOFTHESYSTEMISFOUNDBYTHEDIRECTMINIMIZATIONOFTHEGIBBSFREEENERGYFORAGIVENSETOFSPECIESWITHOUTANYSPECIFICATIONOFTHEPOSSIBLEREACTIONSTHATMIGHTTAKEPLACEINTHESYSTEMTHUS,ITISASSUMEDTHATTHECARBONINTHEFUELISREFORMEDONLYTOCH4COORCO2ANDCSTHEEQUILIBRIUMCOMPOSITIONSHAVEBEENCALCULATEDFORAGIVENOPERATINGCONDITIONAND,INORDERTODETERMINETHECHEMICALEFFICIENCY,THEMASSANDENERGYBALANCES010002000300040002502001501005000150202503045055060650707509095ELECTRICMOTORSPEEDRPMELECTRICMOTORTORQUENMFIG2ELECTRICMOTOREFFICIENCYTABLE2POWERTRAINCOMPONENTSSPECIFICATIONSELECTRICMOTORBATTERYPACKRATEDPOWER75KWENERGYCAPACITY13KWPEAKTORQUE270NM30004200RPMNOMVOLTAGE340RATEDTORQUE130NM05000MAXCURRENT180MINCURRENTC060FIG3ATRSYSTEM0150504505509EFFICIENCYMAX/MINTORQUE1842016140154143ARESOLVEDFOREACHCONFIGURATIONTHECHEMICALEFFICIENCYOFTHEATRSYSTEMCANBEWRITTENASGCHEMATRNH2C1LHVH2NC8H18C1LHVC8H182WHERENH2MOL/SISTHENUMBEROFMOLESOFHYDROGENPRODUCED,NC8H18MOL/STHENUMBEROFMOLESOFISOOCTANECONSUMED,LHVH2J/MOLANDLHVC8H18J/MOLTHELOWERHEATINGVALUESOFHYDROGENANDISOOCTANE,RESPECTIVELY500060007000800020203035040506065070750808509MAP41FUELCELLH2BUFFERHRATEDPOWER21KWVOLUME80LVCELLSNO325H2STOREDMASS1KGAACTIVEAREA120CM2H2PRESSURE250BARALAYOUTINORDERTOIDENTIFYTHETHERMODYNAMICALLYFAVORABLEOPERATINGCONDITIONSOFTHEATRSYSTEMFORTHEMAXIMUMCONVERSIONEFFICIENCY,ASENSITIVITYANALYSISHASBEENCARRIEDOUTBYVARYINGC15THESTEAMTOCARBONRATIOS/CATTHEAUTOTHERMALREACTOR,DEFINEDASTHERATIOBETWEENTHEMOLEFLOWRATEOFTHESTEAMFEEDINGTHEREACTORANDTHECARBONMOLEFLOWRATEOFTHEFEEDINGISOOCTANE,INTHERANGE0236C15THEOXYGENTOCARBONRATIOO/CATTHEAUTOTHERMALREACTOR,DEFINEDASTHERATIOBETWEENTHEMOLEFLOWRATEOFTHEOXYGENFEEDINGTHEREACTORANDTHECARBONMOLEFLOWRATEOFTHEFEEDINGISOOCTANE,INTHERANGE1317C15THEPREHEATTEMPERATUREOFISOOCTANEANDWATERFEEDINGTHEAUTOTHERMALREACTOR,RECOVERINGTHEHEATINTERNALLYINTHEPROCESSFOREACHSIMULATIONAC8H18MASSFLOWEQUALTO894C110C04KGSHASBEENIMPOSEDASACONSTRAINT,INORDERTOHAVEANATRSYSTEMINPUTPOWEREQUALTO40KW,WHILETHEOTHEROPERATINGPARAMETERSAREPRESENTEDINFIG3REFERRINGTOTHECARBONDEPOSITIONINTHEATRREACTOR,WHICHISHIGHLYUNDESIRABLEBECAUSEITDEACTIVATESTHECATALYSTANDREDUCESPROCESSEFFICIENCY,THEANALYSISCARRIEDOUTTOPREDICTTHETHERMO144LTRIBIOLIETAL/APPLIEDENERGYDYNAMICALLYCARBONFREEREGIONOFREFORMINGOPERATIONS15HASINDICATEDTHATTHEPRESENCEOFSOLIDCARBONSTRONGLYDEPENDSONTHES/CVALUEANDONREFORMINGTEMPERATUREASARESULTOFTHISANALYSISTHES/CMOLARRATIOCONSIDEREDHERE,FOREVERYREFORMINGTEMPERATURE,ARETHOSEATWHICHCARBONDEPOSITIONISAVOIDEDS/CANDO/CMOLARRATIOSAREIMPORTANTPARAMETERSFORTHEPROCESSTHESEPARAMETERSSHOULDBECHOSENWITHTHEAIMOFAVOIDINGTHEFORMATIONOFCARBONACEOUSDEPOSITSANDMAXIMUMHYDROGENPRODUCTIONEFFICIENCYFIG4SHOWSTHEATREFFICIENCYCALCULATEDWITHRESPECTTODIFFERENTS/CANDO/CRATIOSITCANBEHIGHLIGHTEDTHATTHEMAXIMUMEFFICIENCYVALUEABOUT800ISOBTAINEDFORAS/CANDO/CRATIOEQUALTO12AND16RESPECTIVELYATTHISCONDITIONTHEPREHEATTEMPERATUREFORISOOCTANEANDWATERFEEDINGTHEREACTORISEQUALTO261C176C,WHILETHEOPERATINGREACTORTEMPERATUREISEQUALTO713C176CTHESYNGASCOMPOSITIONLEAVINGTHEREACTORATTHISCONDITIONAFTERTHEFIG4ATRCHEMICALE

温馨提示

  • 1. 本站所有资源如无特殊说明,都需要本地电脑安装OFFICE2007和PDF阅读器。图纸软件为CAD,CAXA,PROE,UG,SolidWorks等.压缩文件请下载最新的WinRAR软件解压。
  • 2. 本站的文档不包含任何第三方提供的附件图纸等,如果需要附件,请联系上传者。文件的所有权益归上传用户所有。
  • 3. 本站RAR压缩包中若带图纸,网页内容里面会有图纸预览,若没有图纸预览就没有图纸。
  • 4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
  • 5. 人人文库网仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对用户上传分享的文档内容本身不做任何修改或编辑,并不能对任何下载内容负责。
  • 6. 下载文件中如有侵权或不适当内容,请与我们联系,我们立即纠正。
  • 7. 本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。

评论

0/150

提交评论