由於呼吸式質子交換膜燃料電池將空氣來源及散熱系統合而為一，因此具有減少重量、體積及耗電量等優勢，不過其受限於較差的散熱能力，容易造成溫度分布不均勻的現象。為了使呼吸式質子交換膜燃料電池溫度分布均勻性的提升，並同時保有較簡單的周邊系統，本研究欲透過風扇配置的改變，降低其溫度分布的不均勻性，並探討在不同風扇配置下之性能表現。
本研究使用反應面積為155 cm2之42級呼吸式質子交換膜燃料電池堆作為測試對象，實驗首先探討電池堆平均溫度、氫氣露點溫度對電池堆性能之影響。當得到最佳性能表現之參數後，將此組操作參數固定，以進行後續不同風扇配置對於燃料電池堆性能及溫度分布影響之研究。實驗結果顯示，當燃料電池操作在60A，意即額定電壓下運行時，6個風扇配置與傳統的1個風扇配置相比，除了提高20%的溫度分布均勻性以延長燃料電池堆的使用壽命之外，風扇消耗功率比例的降低也使燃料電池系統具有更高的淨功率。因此，對於本次研究中使用的42級呼吸式質子交換膜燃料電池堆而言，在熱管理和系統效率上，6個風扇配置為最合適的散熱系統選擇。

Because the air-breathing proton exchange membrane fuel cell (PEMFC) combines the air supply and the cooling system, it has the advantages of reducing weight, volume, and power consumption. However, it’s limited by a lower cooling capacity, and is likely to cause uneven temperature distribution. In order to improve the temperature distribution uniformity of the air-breathing PEMFC and also to remain a simpler balance of plant (BOP) system, this research aims to improve the temperature distribution uniformity through the modification of the fan configuration. Additionally, the performance of air-breathing PEMFC with different fan configurations are discussed as well.
In the first part of this research, the influence of some operating parameters, such as the average temperature of the stack and the hydrogen dew point temperature, on the stack performance were studied. After parameters with the best performance are obtained, the operating parameters are fixed for subsequent studies on the effects of different fan configurations. The results show that the 6-fan configuration not only has a 20% more uniform temperature distribution than the traditional one-fan configuration, which is expected to be helpful for the lifetime extension of the stack, but also improves the net power of fuel cell system, as the fuel cell is operated at 60 A and a rated voltage. As a result, for the 42-cell air-breathing PEMFC stack used in this experiment, the most suitable configuration is 6-fans for both the thermal management and the system efficiency.

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