科研之友
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摘要
Flow field pattern affects the mass transfer and electrochemical reaction characteristics which influence the distribution of reacting gases as well as the performance of proton exchange membrane fuel cell. The mass transfer caused by diffusion and convection can be optimized by designing a suitable flow field pattern for the proton exchange membrane fuel cell. To obtain a superior flow field pattern, we investigate numerically the internal mass transport and electrochemical reaction behaviors of the fuel cell with the single serpentine, the single parallel, the interdigitated and the pin flow field patterns. These results show that when the active area and operating conditions are identical, the single serpentine flow field pattern shows the best characteristics or similar characteristics to the interdigitated flow field pattern which shows the water accumulation because of the electrochemical reaction in the outlet region. However, the pin and the single parallel flow field patterns show the worst mass transfer characteristics, respectively because of the flooding and drying of membrane caused by uneven flow circulation.
- 出版日期2013-1
