The polymer electrolyte membrane (PEM) fuel cell model of a commercial software package is presented. The basic performance model is extended by two chemical degradation effects: ionomer degradation and carbon corrosion including platinum oxidation. The ionomer degradation model describes the ionomer mass loss due to hydrogen peroxide formation and subsequent attack of the ionomer by radicals. The carbon corrosion model calculates the carbon mass loss caused by carbon oxidation and the active area reduction due to platinum oxidation. The degradation models are coupled with an agglomerate model of the catalyst layer. The model is validated against measurements on an industrial cell. For these measurements, the cell is equipped with a segmented measuring board, which is used to measure the current density distribution and high frequency resistance of every segment. In order to test the predictability of the model under different operating conditions, measurements for stoichiometry and pressure variations are carried out. Calculated and measured current density distributions of the cell, aged by an accelerated stress test, are compared for the validation of the degradation model. Moreover, 3D simulation results of the fresh and aged cells are analyzed in detail and the influence of operating conditions on fuel cell aging is pointed out.

中文翻译：

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具有局部降解效应的工业PEM燃料电池的CFD模拟

提出了商用软件包的聚合物电解质膜（PEM）燃料电池模型。基本性能模型由两种化学降解作用扩展：离聚物降解和包括铂氧化在内的碳腐蚀。离聚物降解模型描述了由于过氧化氢的形成和离聚物随后被自由基侵蚀而导致的离聚物质量损失。碳腐蚀模型计算由碳氧化引起的碳质量损失，以及由于铂氧化引起的有效面积减少。降解模型与催化剂层的团聚模型耦合。针对工业电池上的测量对模型进行了验证。为了进行这些测量，该单元配备了分段测量板，用于测量每个段的电流密度分布和高频电阻。为了测试模型在不同操作条件下的可预测性，进行了化学计量和压力变化的测量。比较通过加速应力测试老化的电池的计算和测量的电流密度分布，以验证退化模型。此外，详细分析了新鲜电池和老化电池的3D模拟结果，并指出了工作条件对燃料电池老化的影响。通过加速应力测试老化后，将其进行比较以验证退化模型。此外，详细分析了新鲜电池和老化电池的3D仿真结果，并指出了工作条件对燃料电池老化的影响。通过加速应力测试老化后，将其进行比较以验证退化模型。此外，详细分析了新鲜电池和老化电池的3D仿真结果，并指出了工作条件对燃料电池老化的影响。