| 摘要 |
PURPOSE:To keep a temperature gradient small within the plane of a full cell during a temperature rise and take out power early even at a low temperature via the earlier activation of the cell at the upstream side of a circulation passage by dividing the cell proper into a pair of cell stacks integrated with a heat exchanger. CONSTITUTION:In a temperature rise at cell activation, an activation burner 4 is supplied with a mixed solution of a reform in a reformer 7 and methanol from a tank 8 and atomized for burning, and heated air is thereby circulated for supply to a cell proper 1. The heated air after cooled is exhausted from a damper 5 and combustion air is taken from an intake 6. Flue gas 9 from the reformer 7 flows into a heat exchanger 2 between both stacks 1, and 12, and a heat exchange process takes place with heated gas cooled with the upstream side stack 11, while heated gas having a high temperature flows into the downstream side stack 12. Combustion at a burner 4 is stopped and the introduction of the flue gas to the heat exchanger 2 is shut with a valve 10. In addition, another valve 11 is opened and fresh air drawn with a blower 12 is introduced to the heat exchanger 2, thereby preheating circulation air. Then, the preheated air is fed to the stack 11 and gas from the reformer 7 is supplied, thereby raising the temperature via cell reaction. |
