1、華北電力大學(xué)（北京）碩士學(xué)位論文直接甲醇燃料電池多孔電極兩相滲流模擬實(shí)驗(yàn)研究姓名：曹永春申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：工程熱物理指導(dǎo)教師：杜小澤20080301華北電力大學(xué)碩士學(xué)位論文摘要直接甲醇燃料電池(DMFC)集中了質(zhì)子交換膜燃料電池的優(yōu)點(diǎn)，是燃料電池未來(lái)發(fā)展的重要方向從DMFC多孔電極兩相傳質(zhì)方向入手，把研究重心放在對(duì)流道內(nèi)CO，的處理上。有異于傳統(tǒng)觀點(diǎn)認(rèn)為應(yīng)盡可能高效得從陽(yáng)極流場(chǎng)中移除CO，，已有研究在DMFC的陽(yáng)極流場(chǎng)注入CO，提

2、高了燃料電池的性能。在此基礎(chǔ)上，對(duì)DMFC模型進(jìn)行合理簡(jiǎn)化，建立物理模型，搭建兩相滲流實(shí)驗(yàn)臺(tái)并對(duì)其建立數(shù)學(xué)模型，通過(guò)實(shí)驗(yàn)觀測(cè)與理論分析相結(jié)合的方式，得出電極入口流動(dòng)條件對(duì)多孔滲流的各種影響，最后通過(guò)與文獻(xiàn)中的DMFC電池性能實(shí)驗(yàn)結(jié)果相對(duì)比，驗(yàn)證了研究的有效性，希望能為DMFC的設(shè)計(jì)和改進(jìn)提供一些參考。關(guān)鍵詞：直接甲醇燃料電池，兩相流，滲流，多孔介質(zhì)ABSTRACTDirectmethanolfuelcell(DMFC)whichconc

3、entratesallmeritofprotonexchangemembranefuelcell，isfuturedevelopmentdirectionoffuelcellsThispaperstartswiththedirectofgasliquidmasstransferofporouselectrodeinDMFC，focusonhowtodisposetheC02inchannelContrarytoconventionalc

4、onceptionwhichthinksshouldgetridoftheC02asSOOnaspossiblefromtheanodeflowfieldExistinginvestigatefindsthatanexternaladditionofnon—reactiongasestotheanodeflowfieldofadirectmethanolfuelcellleadtoimprovedcellperformanceOnthe

5、basisofthis，wecarryoutsimplificationonthemodelofDMFC，buildthephysicalmodel，buildtheexperimentplatformAtthesametime，webuildthemathematicalmodeThroughthewayofexperimentobservesandtheoreticalanalysis，weeducetheimpactsofelec

6、trodeentranceflowconditionoverpenetrationinporousmediaFinallywecontrastourresultwithexperimentoftheperformanceofDMFCinexistingdocument；accordinglyverifythevaliditythatwestudyWehopeprovideafewreferencestothedesignandameli