The relative humidity is an important parameter reflecting the performance of proton exchange membrane (PEM) fuel cells, which is often accompanied by changes in heat and temperature. In order to study the different humidification effects on the performance of PEM fuel cells, a temperature and heat transfer (T&HT) model is presented. The innovation of this paper is to study the performance of fuel cell (FC) from the perspective of temperature heat transfer by asymmetric humidification. Firstly, symmetrical humidification experiments are performed at three operating temperatures. After that, a three‐dimensional (3D) structure is built using fluent and T&HT model is imported through custom functions. Secondly, the asymmetric humidification experiment is put into practice with 60 °C operating temperature. Furthermore, the Taguchi method is used to optimize the performance of fuel cells in the crossover experiment. Finally, the experimental and numerical results are compared by the contours and polarization curves. The results show that T&HT model is in agreement with the experiment, and asymmetric humidification is more reasonable and flexible than symmetrical humidification. When the cathode relative humidity is 50% and the anode relative humidity is 75%, the maximum optimization rate of system efficiency is 17%.

中文翻译：

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质子交换膜燃料电池不对称加湿和动态温度的数值和实验研究

相对湿度是反映质子交换膜（PEM）燃料电池性能的重要参数，质子交换膜（PEM）燃料电池通常伴随着热量和温度的变化。为了研究不同的加湿对PEM燃料电池性能的影响，提出了温度和热传递（T＆HT）模型。本文的创新是从不对称加湿的温度传热角度研究燃料电池（FC）的性能。首先，在三个工作温度下进行对称加湿实验。之后，使用流利的软件构建三维（3D）结构，并通过自定义函数导入T＆HT模型。其次，在60°C的工作温度下进行不对称加湿实验。此外，Taguchi方法用于优化交叉实验中的燃料电池性能。最后，通过轮廓和极化曲线比较了实验结果和数值结果。结果表明，T＆HT模型与实验吻合，非对称加湿比对称加湿更加合理，灵活。当阴极相对湿度为50％，阳极相对湿度为75％时，系统效率的最大优化率为17％。