| 摘要 |
<P>PROBLEM TO BE SOLVED: To pass a gas through a heat exchanger even if thermal energy by a combustor is not needed, in an exhaust heat recovering heat exchanger comprising the heat exchanger 3 provided in a gas passage 2 to recover the heat included in the gas by performing heat exchange with the gas carried in one direction within the gas passage, and the combustor 4 provided to be located on the upstream side of the heat exchanger in the gas passage to generate a high-temperature gas by burning a fuel, in which the fuel is supplied to the combustor as occasion demands, and the heat of the high-temperature gas generated in the combustor is recovered by the heat exchanger. <P>SOLUTION: This heat exchanger comprises a bypass passage 8 for guiding at least a part of the gas carried in the gas passage to the downstream side while bypassing the heat exchanger, and a control valve 9 for controlling the quantity of the gas passed through the bypass passage, so that when low-temperature gas is carried in the gas passage, at least a part of it is passed through the bypass passage. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
