| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an exhaust heat recovery system for a fuel cell system in which the deterioration of a cooling effect of the fuel cell caused by fluid for cooling a fuel cell can be prevented without making a radiator large in size or electric power consumption high. <P>SOLUTION: This exhaust heat recovery system of the fuel cell system is constituted such that a heat exchanger 14 for cooling the cell where exhaust heat is recovered from the fluid for cooling the cell, a heat exchanger 15 for a heat receiving gas side to recover the exhausted heat from the heat receiving side gas that is discharged outside the fuel cell system or that flows through the interior of the fuel cell system, a heat storage device 18 to store the recovered exhausted heat, and a radiator 19 to radiate the heat in order to maintain a temperature of the fluid for cooling the fuel cell below a temperature for cooling are installed. In the case an inflow temperature of the fluid for cooling the fuel cell into the fuel cell 10 is not lower than a temperature for determining a bypass state switching, or in the case the amount of stored heat of the heat storage device 18 is not lower than a heat amount for determining the bypass state switching, bypass means 25, 35 to bypass exhaust heat recovery in the heat exchanger 15 for the heat receiving side gas are installed. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
