| 摘要 |
PURPOSE:To readily increase cell operating pressure from atmospheric pressure to rated operating pressure in starting by installing a brahch means by which an excess fuel which flows in an excess fuel line through a fuel electrode is introduced into an atmospheric release circuit. CONSTITUTION:When operating pressure slightly exceeds back pressure, a three- way control valve 14 which was completely opened in a flare stack 16 direction is gradually opened in an excess gas outlet direction, and excess gas flow is gradually switched from a flare stack 16 direction to an excess gas circuit. After the three-way control valve 14 was completely opened in the excess gas outlet direction, operating pressure is increased to rated operating pressure by throttling a pressure control valve 11. A check valve 15 prevents back flow when back pressure is high. Thereby, pressure can be increased with excess fuel sets free to the flare stack 16 in cell starting. Switching from the flare stack circuit to the excess fuel circuit is easily performed. Operating pressure of a cell is easily kept and controlled without giving quick pressure change to a fuel cell main body 1. |
