Solid oxide fuel cells (SOFCs) with enhanced fast ramping power capability and overload tolerance can find important applications in grid stability management and critical data center overload protection. Recently, we have demonstrated a new SOFC configuration featuring a built-in chemical Fe-bed in the anode chamber of a tubular SOFC with exceptional fast power ramping capability and overload tolerance. In the present study, we showed our theoretical understanding of the enhanced performance through a two-dimensional axial symmetrical numerical model. The model couples the charge and mass transport in the tubular SOFC with chemical reaction kinetics in the Fe-bed, producing longitudinal distributions of Nernst potential, H₂O/H₂ molar ratio, local current density and fuel utilization under various operating conditions. The crucial role of Fe-bed in providing instant H₂ to support fast ramping and overload currents has been explicitly explained by this computational model.

中文翻译：

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了解通过内置化学铁床提高SOFC的功率：一种计算方法

固态氧化物燃料电池（SOFC）具有增强的快速倾斜功率能力和过载耐受性，可以在电网稳定性管理和关键数据中心过载保护中找到重要的应用。最近，我们展示了一种新的SOFC配置，该结构在管状SOFC的阳极室中具有内置的化学Fe床，具有出色的快速功率提升能力和过载耐受性。在本研究中，我们通过二维轴向对称数值模型展示了对增强性能的理论理解。该模型将管状SOFC中的电荷和质量传输与Fe层中的化学反应动力学耦合，产生能斯特势H ₂ O / H _2的纵向分布摩尔比，局部电流密度和各种操作条件下的燃料利用率。该计算模型已明确解释了铁床在提供瞬时H ₂来支持快速斜坡和过载电流方面的关键作用。