Abstract
A numerical analysis on the internal condition of a MCFC stack is necessary to estimate the performance and to control the maximum temperature of the stack. In this report, a numerical model is developed which can analyze temperature, current and cell voltage profile in the stack. The model calculates the heat generation distribution using the formulation for MCFC performance, as well as the cell voltage profile using the electric circuit model. The results of the temperature profile and each cell voltage determined by numerical analysis show good agreement with the experimental results of the stack ; thus, the model is an effective stack analysis method. Using this model, we show the cooling gas flow rate in the high output power density condition. Furthermore the results of the cell voltage profile analysis using the electric circuit model shows that the nonuniformity of internal resistance could be one of the reasons for cell voltage deviation.
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