J081012 固体酸化物形燃料電池性能に及ぼす燃料ガス流速分布の影響([J08101]燃料電池(1))

概要

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Effect of distribution of fuel gas velocity on performance of SOFC was experimentally investigated. The fuel gas was supplied to anode-supported cells by two different methods: jet flow and parallel flow, and cell performance was measured at 1000°C by changing H_2 flow rate in each method. In the case of the jet flow, the fuel gas jetted out a blow port and impinged on the fuel electrode surface. On the other hand, in the case of the parallel flow, the fuel gas flowed parallel to the fuel electrode surface. The I-V characteristics were measured using a galvanostat and the impedance spectra were also measured using a frequency response analyzer. As a result, it was found that the cell-voltage in the case of the parallel flow increased greater than that of the jet flow in the higher current density region. And the cell-voltage increased with H2 flow rate in each case. The difference between the cell performances was caused by overpotentials related to phenomena in the lower frequency region. Furthermore, the jet flow and the parallel flow were analyzed by the numerical simulation. The results indicated that there is a relationship between the cell performance and the distribution of fuel gas velocity.
一般社団法人日本機械学会の論文
2011-09-11