| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a highly stable cooling medium into which aluminum is not dissolved and corroded, for cooling a fuel cell driven at high temperatures of 90°C or more. <P>SOLUTION: This cooling medium for cooling the fuel cell of the high-temperature driven type is constituted by adding propylene glycol to pure water. Because the cooling medium does not dissolve the aluminum even if it exceeds a constant period of time at 90°C or more like a curve (a) of the figure, electric conductivity is not rapidly elevated. On the other hand, the electric conductivity of a conventional cooling medium is rapidly elevated when the constant period of time is exceeded at 90°C or more like a curve (b). <P>COPYRIGHT: (C)2004,JPO |
