| 摘要 |
An object of the present invention is to provide a highly reliable fuel cell cogeneration system that assures safety during maintenance by a simple structure. A fuel cell cogeneration system includes: a heat recovery channel (8) in which a first shutoff valve (16), a heat-recovery heat exchanger (4) for recovering exhaust heat developing when a fuel cell (7) generates electricity, a second shutoff valve (17), and a hot water storage tank (1) are sequentially and circularly connected by a heat recovery pipe (3). A heat recovery channel pressure release valve (18) is provided in the heat recovery pipe (3) connecting the first shutoff valve (16), the second shutoff valve (17), and the heat-recovery heat exchanger (4), and is configured to open when internal pressure of the heat recovery pipe (3) closer to the heat-recovery heat exchanger (4) than the first shutoff valve (16) and the second shutoff valve (17) exceeds predetermined pressure. |
