| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel cell system that improves heat exchange efficiency of fuel off-gas and fuel gas and that prevents entry of the ice resulting from water content in fuel off-gas, into a fuel cell stack.SOLUTION: A fuel cell system includes: a fuel gas supply system that supplies fuel gas from a fuel supply source to a fuel cell that has a stack main body having a plurality of unit cells; and a fuel off-gas circulation system that resupplies fuel off-gas to the stack main body. The fuel off-gas circulation system has: a mixed fuel gas passage Rk through which mixed fuel gas G3 including fuel off-gas G2 and fuel gas G1 flows along a direction of an inner surface of a manifold 6 that is placed in the stack main body; and a junction 32c that is arranged on a side of a surface of the manifold 6 and at which the fuel off-gas G2 and the fuel gas G1 join together to provide the mixed fuel gas G3. |
