甲醇裂解气对点燃式发动机性能影响的试验研究

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1、硕士学位论文甲醇裂解气对点燃式发动机性能影响的试验研究(本研究得到国家自然科学基金重点项目资助，编号：20533040)ExperimentinvestigationonperformanceofSpakIgnitionEnginefueledwithmethanoldecompositiongas(SuppoSedbyKeyProjectoftheNationalNaturalScienceFoundationofChina,NO．20533040)学科专业：动力机械及工程研究生：张勇指导教师：姚

2、春德教授天津大学机械工程学院二零零八年五月ABSTRACTAtpresent，energyshortageandenvironmentprotectionaretwoissuesintheICEindustry．Itisakeywaytodevelopcleanandsufficientalternationfuels．Methanol’SC／Hratioislowandcontainingoxygen，causingcompletecombustionwithlittlesmokeandasign

3、ificantreductionofthespecificC02emissions．MethanolisefficientlyproducedatlowcostfromcoalthatisveryabundantinChina．Thereforemethanolisapromisingliquidenergycarrierforcleanburing．Theenginewasfueldwithdissociatedmethanolgaswhichwascatalyticallydissociated

4、frommethanolheatedbyexhaustgas．Theenginecanoperateatleanerfuel-airmixtureduetowiderflammablelimits，higherflamespeedandlowerignitionenergyofthehydrogeninDM．Itwasanalysedthattheapproachofmethanolcrackingdandthesequenceofstepsinachemicalreaction，including

5、catalyticpropertiesofdifferentsortsofcatalysts，inthisdissertation．Withthepremiseofsomemodificationonasparkignitionengine，thedissertationcompareseconomyproperty,powerproperty,exhaustemissionspropertywhendissociatedmethanolgasandgasolineareusedfortheengi

6、ne．Theexperimentalresultsshowthat，thepowerpropertyofdissociatedmethanolengineisapproximatelyequaltothatofgasolineengine，theeconomypropertyoftheengineisbetterwhenitisfueledwithdissociatedmethanolgasthangasoline，andexhaustemissionspropertyisalmostthesame

7、whentheengineisfueledwithdissociatedmethanolgasandgasoline．CO，HCandNOxintheexhaustemissionisdecreasedbymorethan7％，81．6％and29．2％．Onlytheconcentrationofformaldehydeisslightlyhigh，butitsabsolutevalueislower．KEYWORDS：Alternationfuels，Dissociatedmethanolgas

8、，Sparkignitionengine，Performance独创性声明本人声明所呈交的学位论文是本人在导师指导下进行的研究工作和取得的研究成果，除了文中特别加以标注和致谫}之处外，论文中不包含其他人已经发表或撰写过的研究成果，也不包含为获得苤鲞盘堂或其他教育机构的学位或证书而使用过的材料。与我一同工作的同志对本研究所做的任何贡献均已在论文中作了明确的说明并表示了谢意。学位论文作者签名：彼笏签字日期：)卯矿年厂月22日学位论文版权使用授权书本学位论文作者完全了解墨鲞