Abstract Zero-dimensional two-stage SOFC stacks dynamic model was developed to investigate the effect of operating parameters on stacks performance. The model resolves spatially thermal and thermo-electrochemical behaviour for electrochemical reactions, Catalytic Partial Oxidation and Steam Reforming processes. Design variables and thermo-electrochemical properties were obtained from in-house-fabricated SOFCs carried out by project partners. The completed SOFCs based Combined Heat and Power, CHP, system model was validated by data 18 and numerical results obtained at steady-state mode showing its high-fidelity. A parametric study with respect to key operating parameters including changes in fuel utilization, lambda number and current density values was conducted. The global CHP system dynamic response, in term of the current/voltage delivered by two-stage SOFC stacks, under a fixed fuel utilization, has been determined resulting in greater variations in the voltage of a single cell in the first stack in comparison to the corresponding values in the second stack.

中文翻译：

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用于天然气供给的热电联产系统动态模拟的两级固体氧化物燃料电池、SOFC、电堆的数学模型

摘要 建立了零维两级SOFC电堆动态模型来研究运行参数对电堆性能的影响。该模型解决了电化学反应、催化部分氧化和蒸汽重整过程的空间热和热电化学行为。设计变量和热电化学特性是从项目合作伙伴内部制造的 SOFC 中获得的。已完成的基于 SOFC 的热电联产 (CHP) 系统模型通过数据 18 进行了验证，并且在稳态模式下获得的数值结果显示了其高保真度。对关键运行参数进行了参数研究，包括燃料利用率、λ 值和电流密度值的变化。