质子交换膜燃料电池双极板变截面流场设计

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Design ofVariable Cross-sectionFlowField for BipolarPlates inProton ExchangeMembraneFuel Cells

Fu Kang，Li Xichao， Zhao Peiwen，Zheng Lili

（School of Mechanical and Electrical Engineering， Qingdao University， Qingdao 266O71，China）

【Abstract】To optimize the flow field performance of bipolar plates in proton exchange membrane fuel cells， thispaperdesignsa variablecrosssectionflow field basedonthetraditional straightchannelflow field through local indentation，and conducts simulation studies for three structures with diferent numbersof indentations.Theresults showthattheimproved variable cross-sectionflow field is superior tothe traditional straight channelflow field in terms of proton exchange membrane current distribution， water activity，gas distribution and pressure distribution，among which the oxygen，current densityand water activity have been significantly improved.Specifically，themaximum difference in current densitydecreased by 0.025A/cm2 compared to before the improvement，and the maximum value of water activity decreased by O.O4，compared to before the improvement.The research can provide new ideas and theoretical references for the optimal design of the flow field of fuel cells.

【Key Words】proton exchange membrane fuel cell;bipolar plate flow field;simulation;variable crosssection flow field

0 引言

质子交换膜燃料电池（ProtonExchangeMembraneFuelCell，PEMFC）因运行过程噪声低、工作温度低[1]、产物环保无污染[2]等优势，在清洁能源领域受到广泛关注。（剩余5196字）