| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the problem that since, when a selector valve is switched, the temperature of hot water supplied from a bypass route to an exhaust heat recovery heat exchanger and that of hot water supplied from the lower part of a hot water storage tank to the exhaust heat recovery heat exchanger are different, a return temperature of hot water to the exhaust heat recovery heat exchanger fluctuates rapidly. <P>SOLUTION: The fuel cell system includes a fuel cell, a hot water tank, a heat exchanger to recover exhaust heat from the fuel cell, a circulation path having the storage tank and the heat exchanger connected in loop form so as to heat water at the bottom of the hot water tank by using exhaust heat of the fuel cell to make hot water and return hot water to the top of the hot water tank, a bypass route connected to the circulation path so as to bypass the hot water tank, and a selector valve as switching means for switching between water conduction to the bypass route and water conduction to the hot water tank. Because at least a part of the bypass route is disposed so as to exchange heat with the hot water tank, fluctuations in return hot water to the heat exchanger can be reduced, even when the selector valve is switched from the bypass route to the circulation path. <P>COPYRIGHT: (C)2012,JPO&INPIT |
