質子交換膜燃料電池流場數值模擬

Flow field simulation of proton exhange membrane fuel cell

許逸達(Yi-Ta Hsu)

指導教授 ： 蘇艾

元智大學/工程學院/機械工程學系/碩士(2003年)

摘要

本研究以三維數值模型模擬質子交換膜燃料電池。利用此三維模型，可以預測質子交換膜燃料電池內的傳輸現象，以及不同流道型式對於性能之影響。水分的多寡會影響質子交換膜燃料電池性能甚鉅，太少會導致薄膜脫水以致於組抗上升而性能下降，太多會造成逸水現象而降低了質傳效率，藉由此三維數值模型可以分析質子交換膜燃料電池中的水氣分布，進而改善質子交換膜燃料電池之效能。研究中發現，蛇形流場中的流體分布特性明顯優於柵狀流場中的分布情形，代表蛇形流場可將薄膜電極組的特性完全展現出來。

關鍵字

質子交換膜燃料電池 ； 柵狀流道 ； 蛇形流道 ； 薄膜電極組

並列摘要

A unified, three-dimensional, steady-state numerical mass-transfer sing cell model for proton exchange membrane fuel cell (PEMFC) was developed. This model can predict the phenomenon in the fuel cell, and difference channel pattern influence the cell performance. The flow channel pattern play an important role in fuel cell design. The fuel cell performance will be directly affected by the flow channel pattern. In other word, the proper flow channel design will help the fuel cell to get rid of the producing water and heat. The purpose of this study is to numerically simulate the mass transfer of gas in flow channel with different pattern (straight flow, and serpentine flow) and investigate the change of the pressure, flow rate, pressure drop. We found that the flow characteristic in serpentine flow pattern is much better than that in straight flow pattern meaning that the application of serpentine flow pattern in proton exchange membrane fuel cell is much feasible to let the character of MEA come out completely.

並列關鍵字

proton exchange membrane fuel cell ； straight flow pattern ； serpentine flow pattern ； MEA

參考文獻

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