本文藉由數值分析的方式來模擬質子交換膜燃料電池內之濃度場以及溫度場之分佈，並對流道內之流場及壓力場加以分析。本文同時針對四種不同形狀(單通道蛇形流道、三通道蛇形流道、平形流道、棋盤形流道)之三維流道，模擬各種流道形狀下質子交換膜燃料電池之性能，並利用水洞實驗觀測各種流道中流體流動的情形，以驗證數值模擬之結果。
在理論分析中，使用那維-史都克(Navier-Stokes equation)作為流場的統御方程式配合能量及成份守恆方程式及電化學相關方程式求解燃料電池內之速度、壓力、溫度、濃度及電流密度之分佈。數值方法中以有限容積法為離散方法，並使用SIMPLEC法求解流場之分佈。本文之結果顯示，陰極側之氧氣濃度分佈對電池之性能有極大的影響，當氧氣不足時會造成濃度過電位，若提高流道入口之壓力或燃料的濃度，則可提升電池之性能。在不同流道形狀的模擬中，單通道蛇形流道之電化學反應性能最佳，但流道之壓損則過大，其他流道之電化學反應性能雖略差，但流道之壓損則小很多。

The numerical analytical methods were used to predict concentration, temperature distribution in PEMFC (proton exchange polymer fuel cell), and the velocity and pressure field in flow channel were also discussed in this study. The polarization curves of these numerical results are coincided with the experimental results. Four different flow channel designs were test in this study to compare the output performances of the fuel cell. The flow visualization were carried out in a water channel to compare the flow and pressure fields with the numerical results.
The Navier-Stokes equations with the energy, species equations and the relative electrochemical equations were solved in this study. The SIMPLEC algorithm with finite volume based scheme was used in this numerical analysis. The results indicated the concentration of oxygen in the cathode are significant effects for the cell performance, the concentration over-potential increased while the failure to transport sufficient oxygen to the catalyst, oppositely the cell performance increased as the inlet pressure or concentration of the reactant are increased. The results also shown the Single-Snake type channel have the best output performance, but the penalty is significant pressure drop.

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