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Nonisothermal two‐phase modeling of the effect of linear nonuniform catalyst layer on polymer electrolyte membrane fuel cell performance
Energy Science & Engineering ( IF 3.5 ) Pub Date : 2020-06-17 , DOI: 10.1002/ese3.765 Seyedali Sabzpoushan 1 , Hassan Jafari Mosleh 2 , Soheil Kavian 3 , Mohsen Saffari Pour 4, 5 , Omid Mohammadi 2 , Cyrus Aghanajafi 6 , Mohammad Hossein Ahmadi 7
Energy Science & Engineering ( IF 3.5 ) Pub Date : 2020-06-17 , DOI: 10.1002/ese3.765 Seyedali Sabzpoushan 1 , Hassan Jafari Mosleh 2 , Soheil Kavian 3 , Mohsen Saffari Pour 4, 5 , Omid Mohammadi 2 , Cyrus Aghanajafi 6 , Mohammad Hossein Ahmadi 7
Affiliation
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In this research, it is investigated to numerically evaluate the performance of a polymer electrolyte membrane fuel cell (PEMFC). The performance is investigated through the nonuniformity gradient loading at the catalyst layer (CL) of the considered PEMFC. Computational fluid dynamics is used to simulate a 2D domain in which a steady‐state laminar compressible flow in two‐phase for the PEMFC has been considered. In this case, a particular nonuniform variation inside the CL along the channel is assumed. The nonuniform gradient is created using a nonisothermal domain to predict the flooding effects on the performance of the PEMFC. The computational domain is considered as the cathode of PEMFC, which is divided into three regions: a gas channel, a gas diffusion layer, and a CL. The loading variation inside the catalyst is defined as a constant slope along the channel. In order to find the optimum slope, different slope angles are analyzed. The results point out that the nonuniform loading distribution of the catalyst (platinum) along the channel could improve the fuel cell performance up to 1.6% and 5% for power density and voltage generation, respectively. It is inferred that it is better to use more catalyst in the final section of the channel if the performance is the main concern.
中文翻译：
线性不均匀催化剂层对聚合物电解质膜燃料电池性能影响的非等温两相模拟
在这项研究中，进行了研究以数值评估聚合物电解质膜燃料电池（PEMFC）的性能。通过考虑的PEMFC的催化剂层（CL）上的非均匀梯度加载来研究性能。计算流体动力学用于模拟二维域，其中考虑了PEMFC两相稳态层流可压缩流。在这种情况下，假设沿着通道的CL内部存在特定的不均匀变化。使用非等温域创建非均匀梯度，以预测洪水对PEMFC性能的影响。计算域被视为PEMFC的阴极，它分为三个区域：气体通道，气体扩散层和CL。催化剂内部的负载变化定义为沿通道的恒定斜率。为了找到最佳斜率，分析了不同的斜角。结果指出，沿通道的催化剂（铂）的不均匀负载分布可以分别将功率密度和电压产生的燃料电池性能分别提高1.6％和5％。可以推断，如果主要关注性能，最好在通道的最后部分使用更多的催化剂。
更新日期：2020-06-17
中文翻译：
线性不均匀催化剂层对聚合物电解质膜燃料电池性能影响的非等温两相模拟
在这项研究中，进行了研究以数值评估聚合物电解质膜燃料电池（PEMFC）的性能。通过考虑的PEMFC的催化剂层（CL）上的非均匀梯度加载来研究性能。计算流体动力学用于模拟二维域，其中考虑了PEMFC两相稳态层流可压缩流。在这种情况下，假设沿着通道的CL内部存在特定的不均匀变化。使用非等温域创建非均匀梯度，以预测洪水对PEMFC性能的影响。计算域被视为PEMFC的阴极，它分为三个区域：气体通道，气体扩散层和CL。催化剂内部的负载变化定义为沿通道的恒定斜率。为了找到最佳斜率，分析了不同的斜角。结果指出，沿通道的催化剂（铂）的不均匀负载分布可以分别将功率密度和电压产生的燃料电池性能分别提高1.6％和5％。可以推断，如果主要关注性能，最好在通道的最后部分使用更多的催化剂。
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