| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fuel cell hot-water supply system which can secure water to be used in a fuel cell unit from a source other than the fuel cell unit without consuming additional energy. <P>SOLUTION: A fuel cell unit 2 includes a water tank 71 storing drain water, as water for steam reforming, recovered by a heat exchanger 6 for exhaust heat recovery. A latent heat recovery-type heat source unit is used as an auxiliary heat source unit 12 for auxiliary heating when a hot water storage temperature is low in a hot water storage tank 8 of a hot water storage unit 3, and a drain water supply circuit 4 is disposed for supplying generated drain water to the water tank 71 in the fuel cell unit 2. A drain pump 43 is controlled so as to operate when a water level of the water tank 71 has lowered or when the drain tank 41 has become full. It is possible to additionally supply drain water from the auxiliary heat source unit 12 to the water tank 71. <P>COPYRIGHT: (C)2012,JPO&INPIT |
