溶融炭酸塩型燃料電池スタックにおける積層ガス配流

概要

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A molten carbonate fuel cell (MCFC) stack using internal manifold and co-flow configuration has been recognized as a key structure for commercial plants. In a conventional stack, it is more difficult to obtain a uniform gas flow in the stacking direction than in a stack using an external manifold configuration. The uniformity of gas flow rate in each stacked cell affects the cell performance, and careful design of the gas flow rate distribution in the stacking direction is required. In this study, the stacking direction gas flow characteristics in a plate heat exchanger type MCFC stack were examined by numerical analysis. A stack consisting of 100 cells was assumed, and the fuel gas flow was calculated under various manifold section sizes, gas utilizations, and pressure conditions. The junction pressure losses and electrochemical reactions, which mainly affect the stacking direction gas flow, were considered. Considering the effect on the cell performance, a design guideline for the flow uniformity in the stacking direction was discussed.
社団法人日本機械学会の論文
1998-11-25