| 摘要 |
A fuel cell stack (10) is provided with a pair of refrigerant inlet ports (34a) and a pair of refrigerant outlet ports (34b). The refrigerant inlet ports (34a, 34a) are disposed in the vicinity of an oxidant gas inlet port (30a) and a fuel gas inlet port (32a) in a manner such that one of the refrigerant inlet ports (34a) is disposed on the side of the oxidant gas inlet port (30a) and the other refrigerant inlet port (34a) is disposed on the side of the fuel gas inlet port (32a). The refrigerant outlet ports (34b, 34b) are disposed in the vicinity of an oxidant gas outlet port (30b) and a fuel gas outlet port (32b) in a manner such that one of the refrigerant outlet ports (34b) is disposed on the side of the oxidant gas outlet port (30b) and the other refrigerant outlet port (34b) is disposed on the side of the fuel gas outlet port (32b). The operation method involves a step for detecting whether or not, at minimum, a portion of a fuel gas path is blocked by water, and a step for preventing a refrigerant from flowing into the refrigerant outlet port (34b) disposed in the vicinity of the fuel gas outlet port (32b) when it is determined that, at minimum, a portion of the fuel gas path is blocked by water. |
