| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel-cell system for moving objects, that can reduce residual hydrogen concentration to an extremely low level in a hydrogen circula tion system consisting of the fuel-pole side of a fuel cell and the secondary side of hydrogen separation film, at the time of system suspension, within a short time before the temperature of the hydrogen separation film becomes lower than the hydrogen-embrittlement temperature. SOLUTION: At system suspension, electricity is generated by residual hydrogen, while vapor is circulated in a hydrogen circulation system HLP, consisting of the fuel-pole side of a fuel cell 100 and the secondary side of hydrogen separation film 106. After that, while the vapor is being circulated in the hydrogen circulation system, voltage is applied to the fuel cell 100 from a battery 401, and by electrochemically transporting residual hydrogen which is left in slight amount from the fuel pole to the air pole of the fuel cell, residual hydrogen concentration in the hydrogen circulation system is reduced. |
