仿生物結構流道對質子交換膜燃料電池的影響

The Effect of Bio-Structure Flow Field on the Cell Performance of PEM Fuel Cells

王錦文(Chin-Wen Wang)

指導教授 ： 林 育 才

元智大學/工程學院/機械工程學系/碩士(2005年)

摘要

本文主旨為研究探討仿生物結構流道對質子交換膜燃料電池的影響，在實驗中為了使燃料能夠均勻分佈於燃料電池的流道以提升電池的反應效率，因此藉由大自然界中生物結構的特性(即主流道與分枝流道)設計出新型式的流道，以達到將燃料快速均勻的傳遞到電池的膜電極組上進行反應，而提高燃料電池的反應效率。在實驗中，分別設計長、短分枝的仿生物結構流道，並分別在不同的燃料加濕溫度及電池溫度參數下進行燃料電池的操作，另外配合透明可視化的燃料電池實驗，以輔助分析燃料電池在這些操作參數下內部流道的情形。實驗結果發現，仿生物結構流道確實能使的燃料更均勻的分佈，且長分枝流道效果較短分枝流道顯著，電池效能亦較高。

關鍵字

仿生物結構 ； 流道 ； 質子交換膜燃料電池

並列摘要

For the fuel to be distributed more quickly and uniformly in the gas channel, the diffusion layer and the catalyst layer, a novel channel type has been designed to improve the cell performance by the characteristic of biology. The influence of several bio-structure flow field patterns on the performance of PEM fuel cells has been investigated experimentally. The effect of different lengths of the branch of the bio-structure channel was studied under different operating conditions, including the cell temperature and the humidified temperature. A transparent PEM cell was also designed to visualize the phenomena in the channel to get more insight into the water transport of the cell. The results show that the bio-structure can make the fuel distribute more uniformly in the gas channel and that the cell performance with longer branch channels is better than the shorter ones.

並列關鍵字

bio-structure ； channel ； PEM fuel cells