| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2011: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2010: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2009: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Research Abstract |
Effect of concentration boundary in a fuel gas channel on performance of a solid oxide fuel cell was investigated by experiments and numerical analyses. The fuel gas was supplied to anode-supported cells by two different methods : jet flow and parallel flow, and cell performance was measured as changing H_2 flow rate in each method. As a result, it was found that the cell-voltage in the case of the parallel flow was greater than that of the jet flow in the higher current density region. And the cell-voltage increased with H_2 flow rate in each case. These differences between the cell-performances were caused by overpotentials related to phenomena in the lower frequency region. Furthermore, the results of the numerical analyses indicated that these differences between the cell-performances had a significant correlation with the electromotive force that was determined by the H_2 concentration on the fuel electrode surface.
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