Analysis of a molten carbonate fuel cell: Numerical modeling and experimental validation
Analysis of a molten carbonate fuel cell: Numerical modeling and experimental validation
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DOI：
10.1016/j.jpowsour.2005.07.093
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发表时间：
2006-07
影响因子：
9.2
通讯作者：
J. Brouwer;F. Jabbari;E. Leal;Trevor S. Orr
中科院分区：
文献类型：
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作者：
J. Brouwer;F. Jabbari;E. Leal;Trevor S. Orr
提出了一种详细的动态模型，该模型结合了熔融碳酸盐燃料电池（MCFC）的几何分辨率以及流向物理和电化学过程的动态模拟。该模型是利用质量和动量守恒、电化学和化学反应机制以及传热原理开发的。将模型的结果与实验 MCFC 装置的数据进行比较。此外，该模型还用于预测 MCFC 响应变化的负载需求时电压、电流和温度的动态变化。使用两种不同的方法评估电压：一种方法应用 Yuh 和 Selman [C.Y. Yuh, J.R. Selman，熔融碳酸盐燃料电池电极的极化：I. 稳态极化数据分析，J. Electrochem。苏克。 138（1991）3642–3648； C.Y. Yuh, J.R. Selman，熔融碳酸盐燃料电池电极的极化：II。交流阻抗表征和对电流中断的响应，J. Electrochem。苏克。 138 (1991) 3649–3655]，另一个应用使用平均局部温度和压力的简化方程。结果表明，这两个模型均可用于预测 MCFC 的电压和动态响应特性，并且使用更详细的 Yuh 和 Selman 方法的模型可以在各种工作条件下准确且一致地预测这些特性。
A detailed dynamic model incorporating geometric resolution of a molten carbonate fuel cell (MCFC) with dynamic simulation of physical and electrochemical processes in the stream-wise direction is presented. The model was developed using mass and momentum conservation, electrochemical and chemical reaction mechanisms, and heat-transfer. Results from the model are compared with data from an experimental MCFC unit. Furthermore, the model was applied to predict dynamic variations of voltage, current and temperature in an MCFC as it responds to varying load demands. The voltage was evaluated using two different approaches: one applying a model developed by Yuh and Selman [C.Y. Yuh, J.R. Selman, The polarization of molten carbonate fuel cell electrodes: I. Analysis of steady-state polarization data, J. Electrochem. Soc. 138 (1991) 3642–3648; C.Y. Yuh, J.R. Selman, The polarization of molten carbonate fuel cell electrodes: II. Characterization by AC impedance and response to current interruption, J. Electrochem. Soc. 138 (1991) 3649–3655] and another applying simplified equations using average local temperatures and pressures. The results show that both models can be used to predict voltage and dynamic response characteristics of an MCFC and the model that uses the more detailed Yuh and Selman approach can predict those accurately and consistently for a variety of operating conditions.