An Along‐the‐Channel Model for Proton Exchange Membrane Fuel Cells
An Along‐the‐Channel Model for Proton Exchange Membrane Fuel Cells
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DOI：
10.1149/1.1838431
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发表时间：
1998-04
影响因子：
3.9
通讯作者：
J. Yi;T. Nguyen
中科院分区：
文献类型：
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作者：
J. Yi;T. Nguyen
建立了一个沿通道模型，用于评估各种设计和操作参数对质子交换膜（PEM）燃料电池性能的影响。该模型，这是基于以前的，已被扩展到包括对流水输送通过膜的压力梯度，温度分布在固相沿着的流动通道，并通过自然对流和同向流和逆流热交换器的热量去除。结果表明，阳极增湿和阴阳极压差增大水的反输速率可以改善PEM燃料电池的性能。研究结果还表明，有效的排热是必要的，以防止过高的温度，可能导致局部膜脱水。对于热量的去除和分配，逆流式热交换器是最有效的。
An along-the-channel model is developed for evaluating the effects of various design and operating parameters on the performance of a proton exchange membrane (PEM) fuel cell. The model, which is based on a previous one, has been extended to include the convective water transport across the membrane by a pressure gradient, temperature distribution in the solid phase along the flow channel, and heat removal by natural convection and coflow and counterflow heat exchangers. Results from the model show that the performance of a PEM fuel cell could be improved by anode humidification and positive differential pressure between the cathode and anode to increase the back transport rate of water across the membrane. Results also show that effective heat removal is necessary for preventing excessive temperature which could lead to local membrane dehydration. For heat removal and distribution, the counterflow heat exchanger is most effective.