| 摘要 |
A fuel cell system is provided to improve hydrogen availability, to prevent flooding phenomenon and the degradation of a fuel cell stack, and to suppress corrosion of a catalyst supporter and deterioration of a catalyst. A fuel cell system(100) comprises a fuel cell stack(110) generating electric energy; a hydrogen supply part(120) supplying hydrogen to the fuel cell stack through a hydrogen supply line(171); and a hydrogen recycling part(160) which supplies residual gas discharged from the fuel cell stack to the hydrogen supply line through a hydrogen recycle line(173) connected to the hydrogen supply line. The hydrogen supply part comprises a first multiple-orientation valve(140) flowing hydrogen in one direction or inletting external air. |
