| 摘要 |
PROBLEM TO BE SOLVED: To extend the life of the component parts of a fuel cell system. SOLUTION: The system comprises an electric conductivity meter 22 for monitoring the electric conductivity of cooling water supplied to a stack 2, an ion removal unit 23 for removing ions dissolved in the cooling water, a regulation valve 33 for regulating flow rate of cooling water flowing through the ion removal unit 23 based on the electric conductivity and a bypass line 32 connected parallel to the ion removal unit 23. Cooling water discharged from the stack 2 is circulated and supplied again in the stack 2. The control valve 33 controls the ratio of the flow of the cooling water that flows in respect of the ion removal unit 23 and the bypass line 32. This time, the flow rate of the cooling water flowing in respect of the ion removal unit 23 is larger than that of the cooling water flowing in respect of the ion removal unit 23 when the electric conductivity is a second value that is larger than that of the first value. |
