能源危機是二十一世紀全球所面臨的重大問題,傳統藉由內燃機與石化燃料產生能量的裝置,不但造成環境污染更使得能源短缺,新一代的電力產生裝置燃料電池,提供極低污染且幾乎不消耗任何能源的發電裝置,目前已有多種形式之燃料電池產生,其中以質子交換膜燃料電池較為成熟、應用層面較廣,而如何使燃料電池量產化及提升燃料電池的效能是現今的研究方向。燃料電池的組成所涉及範圍相當廣泛,本研究主要針對於陰極流道部分加以探討,主要利用數值模擬的方法,來分析質子交換膜燃料電池之交叉式流道內流場結構,在不同的邊界條件下,探討流道出入口壓力差、流道展弦比、孔隙度百分比、觸媒層消耗速率之影響,並觀察氧化劑於區間內累積之濃度,進而探討這些參數對於燃料電池之性能,何者較符合最佳化設計之燃料電池型態。
This work concentrates on the improvement in the optimum of interdigitated flow field of the proton exchange membrane fuel cell (PEMFC). The gaseous flow channel plays a significant role in the transport of oxygen to the reaction surface. A mathematical model has been developed to simulate fluid flow and oxygen mole fraction distribution fields. Besides, the thermal flow field has been discussed in this thesis, which utilized the PHOENICS computer code to analyze and investigate the effects of important design parameters on the channel flow field.