Enhancement of Proton Exchange Membrane Fuel Cell Performance Using a Novel Tapered Gas Channel

›› 2009, Vol. 17 ›› Issue (2): 286-297.

Enhancement of Proton Exchange Membrane Fuel Cell Performance Using a Novel Tapered Gas Channel

钟振忠, 陈俊勋, 庄平吉

Department of Mechanical Engineering, National Chiao Tung University, Hsinchu 300, China

收稿日期:2008-09-29 修回日期:2009-02-17 出版日期:2009-04-28 发布日期:2009-04-28
通讯作者: ZHONG Zhenzhong,E-mail:chenchung.me93g@nctu.edu.tw
基金资助:
Supported by the National Science Council (NSC 97-222-E-009-067)

Enhancement of Proton Exchange Membrane Fuel Cell Performance Using a Novel Tapered Gas Channel

ZHONG Zhenzhong, CHEN Junxun, ZHUANG Pingji

Department of Mechanical Engineering, National Chiao Tung University, Hsinchu 300, China

Received:2008-09-29 Revised:2009-02-17 Online:2009-04-28 Published:2009-04-28
Supported by:
Supported by the National Science Council (NSC 97-222-E-009-067)

摘要/Abstract

摘要： Based on use of multi-dimensional models,this investigation simulates the performance of a proton exchange membrane fuel cell by varying the channel pattern.In the one-dimensional model,the porosity of the gas diffusion layer is 0.3.The model reveals the water vapor distribution of the fuel cell and demonstrates that the amount of water vapor increases linearly with the reduction reaction adjacent to the gas channel and the gas diffusion layer.Secondly,four novel tapered gas channels are simulated by a two-dimensional model.The model considers the distributions of oxygen,the pressure drop,the amount of water vapor distribution and the polarization curves.The results indicate that as the channel depth decreases,the oxygen in the tapered gas channel can be accel-erated and forced into the gas diffusion layer to improve the cell performance.The three-dimensional model is employed to simulate the phenomenon associated with four novel tapered gas channels.The results also show that the best performance is realized in the least tapered gas channel.Finally,an experimentally determined mechanism is found to be consistent with the results of the simulation.

关键词: multi-dimensional models, proton exchange membrane fuel cell, tapered gas channels, oxygen, pressure drop

Abstract: Based on use of multi-dimensional models,this investigation simulates the performance of a proton exchange membrane fuel cell by varying the channel pattern.In the one-dimensional model,the porosity of the gas diffusion layer is 0.3.The model reveals the water vapor distribution of the fuel cell and demonstrates that the amount of water vapor increases linearly with the reduction reaction adjacent to the gas channel and the gas diffusion layer.Secondly,four novel tapered gas channels are simulated by a two-dimensional model.The model considers the distributions of oxygen,the pressure drop,the amount of water vapor distribution and the polarization curves.The results indicate that as the channel depth decreases,the oxygen in the tapered gas channel can be accel-erated and forced into the gas diffusion layer to improve the cell performance.The three-dimensional model is employed to simulate the phenomenon associated with four novel tapered gas channels.The results also show that the best performance is realized in the least tapered gas channel.Finally,an experimentally determined mechanism is found to be consistent with the results of the simulation.

Key words: multi-dimensional models, proton exchange membrane fuel cell, tapered gas channels, oxygen, pressure drop

钟振忠, 陈俊勋, 庄平吉. Enhancement of Proton Exchange Membrane Fuel Cell Performance Using a Novel Tapered Gas Channel[J]. , 2009, 17(2): 286-297.

ZHONG Zhenzhong, CHEN Junxun, ZHUANG Pingji. Enhancement of Proton Exchange Membrane Fuel Cell Performance Using a Novel Tapered Gas Channel[J]. , 2009, 17(2): 286-297.

参考文献

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Enhancement of Proton Exchange Membrane Fuel Cell Performance Using a Novel Tapered Gas Channel

Enhancement of Proton Exchange Membrane Fuel Cell Performance Using a Novel Tapered Gas Channel

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