| 摘要 |
PURPOSE:To increase pressure loss in the inlet and the outlet of a cell, reduce hydrostatic pressure effect caused by gas density difference, and make flow rate distribution uniform by arranging a resistance which produces flow resistance in the front of cell stack on fuel gas inlet side and/or the surface of cell stack on its outlet side. CONSTITUTION:A flow resistance 8 is arranged in the front of fuel gas inlet in a cell stack 1. The flow resistance 8 produces resistance to fuel gas supplied, and any resistance such as porous plate which produces large pressure loss compared with hydrostatic pressure effect can be used for the flow resistance 8. In pressure distribution in the inside of manifold of the inlet and outlet of fuel cell, since pressure difference between the inlet and the outlet is increased by the flow rate resistance plate, the upper part pressure difference DELTAPtop and the lower part pressure difference DELTAPbottom are increased, and the ratio of pressure difference in the upper part and the lower part (DELTAPtop/DELTAPbottom) becomes nearly 1. Therefore, the flow rate distribution in a cell height direction is made uniform. |
