过量空气系数对燃料电池发动机输出特性的影响  

A Study on the Characteristics of a Fuel Cell Engine with Different Excess Air Ratio

作　　者：秦敬玉[1] 毛宗强[1] 徐景明[1] 解正国[1] 

机构地区：[1]山东大学南区材料科学与工程学院

出　　处：《汽车工程》2004年第4期379-381,385,共4页Automotive Engineering

基　　金：国家 8 6 3燃料电池发动机 (2 0 0 1AA5 0 114 2 );国家氢能 973(G2 0 0 0 0 2 6 4 10 )项目资助

摘　　要：以一个 2kW氢 空质子交换膜燃料电池堆以及由此组成的发动机台架为研究对象 ,探讨了过量空气系数 λ改变所导致的燃料电池堆和发动机输出特性的变化。结果表明 ,增大λ可提高电堆性能 ,当λ增大到 2 .0附近 ,电堆性能随λ增加速度明显减小 ,当λ >3.0时 ,电堆性能基本上与λ无关。λ=2 .0The characteristics of a 2kW H 2-Air PEMFC stack and its corresponding prototype engine were studied with different excess air ratio λ by experiment.It was shown that the performance of the stack could be enhanced obviously by increasing λ when λ<2,but a little benefit was achieved in the region of 2<λ<3.As soon as λ>the performance hardly changed with λ.The optimal net power output of engine was achieved when λ=2.

关 键 词：电动汽车 氢-空燃料电池 过量空量系数 燃料电池发动机 

分 类 号：TK40[动力工程及工程热物理—动力机械及工程]