陰極蛇形流道中擋板位置對質子交換膜燃料電池性能之影響

Abstract

本論文係利用計算流體力學軟體CFDRC建立燃料電池之三維模型探討蛇形流道在不同位置加入擋板對整體性能影響。流道加入了擋板利用強制對流的方式迫使氧氣強制進入氣體擴散層與觸媒層以增加電池性能與提高剪應力來強化排水。首先針對蛇形流道加入擋板是否能移除水分並提高性能，其次試著在不同位置加入擋板探討對電池性能、氧氣分佈與水分佈的情形，最後改變氣體擴散層滲透率來觀察對多孔層介面的現象

The purpose of this thesis is to establish a three-dimensional computational model of the proton exchange membrane fuel cell .The main object is to investigate the effect of baffle location in the serpentine channel. First, we try to discussion whether baffle can effective remove water to lift the cell efficiency。Second, focusing on the different location of baffle in the channel to discuss the cell performance、oxygen concentration and water distribution. Finally we try to change the permeability of gas diffusion layer in order to observe the phenomenon of porous media.