| 摘要 |
PROBLEM TO BE SOLVED: To provide a simple, highly efficient mechanical seal method excellent in the fuel utilization rate by applying an epoch-making idea to a conventional mechanical seal method currently utilized for prevention of cross leak with a fuel gas and oxidizer gas. SOLUTION: This cell is alternately stacked with a flat unit cell 3 in which an air pole 6 and a fuel pole 5 are respectively disposed on both surfaces of a tabular type solid electrolyte layer 4 and a separator 1 which electrically connects adjoining unit cells in series and distributes a fuel and oxidizer gas to each unit cell. In this composition, the cell has a mechanical seal structure in which a metal mesh or a metal felt 7 is disposed between the fuel pole 5 and the fuel gas circulation passage side of the separator 1 and a spacer 2 is placed between the solid electrolyte layer 4 of the unit cell 3 and the separator 1, and regulates a pressure difference between the air and fuel gas by flowing an oxidizer gas and fuel gas as the parallel flow in a stack and by structurally changing a flow resistance in a circulation groove for the air and fuel gas formed in the separator 1. |
