Abstract A new theoretical model of the thermally self-sustained proton exchange membrane fuel cell (PEMFC) is proposed, where syngas is preheated by the heat from the reaction in the fuel cell and water gas shift reactions, and the endothermic steam reforming process of methane is maintained by absorbing a part of the combustion heat of residuary hydrogen from the fuel cell. Based on some thermal equilibrium equations, the temperatures of syngas and combustion product in different stages are calculated, respectively. The power density and conversion efficiency of the PEMFC are derived. The influences of the molar flow rate of syngas, hydrogen utilization ratio, and working temperature of the fuel cell on the property of the PEMFC are discussed detailedly. In the rational range of the operating temperature, the maximum power densities and corresponding efficiencies are calculated, the optimum values of several key parameters at the maximum power densities are determined, and the optimal selection criteria of molar flow rate of syngas and other parameters are provided.

中文翻译：

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自立式PEMFC的配置设计及参数优化选择

摘要 提出了一种新的热自持质子交换膜燃料电池 (PEMFC) 理论模型，其中合成气由燃料电池反应和水煤气变换反应产生的热量以及甲烷的吸热蒸汽重整过程预热。通过吸收燃料电池中残留氢气的部分燃烧热来维持。基于一些热平衡方程，分别计算了不同阶段合成气和燃烧产物的温度。推导出 PEMFC 的功率密度和转换效率。详细讨论了合成气摩尔流量、氢气利用率和燃料电池工作温度对PEMFC性能的影响。在合理的工作温度范围内，