J0601-1-1 電極構造パラメータを考慮した円筒型SOFCの数値予測(SOFC内の電極近傍現象)

概要

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Numerical simulation of tubular SOFC is conducted using electrode microstructural parameters. Layers of cross-sectional images are obtained using dual-beam focused ion beam-scanning electron microscope (FIB-SEM), and three-dimensional structure is reconstructed. Microstructural parameters such as tortuosity factor and porosity are calculated, and applied to the one-dimensional model. Gas transport is modeled using Dusty Gas Model (DGM). Fuel with a mixture of methane, hydrogen and steam is used, and the cell performance is compared with the experimental results. I-V (current-voltage) curves of both experimental and numerical results show the same trend when S/C (steam-carbon ratio) is varied. It is found that the average pore diameter and tortuosity factor have major effects on the concentration overpotential.
社団法人日本機械学会の論文
2009-09-12