| 摘要 |
PURPOSE:To supply middle-temperature hot-water for an usual hot-water supply and enable to supply it for a rapid hot-water supply by heating it in a heat exchanger for reheating by a method wherein the outlet of water in the heat exchanger for the cooling water of the engine is connected to the inlet of the heat exchanger for reheating of a combustion part and a switching valve is provided on the way of the connecting pipe line. CONSTITUTION:City water of about 55 deg.C, passed through the heat exchanger 26 for the cooling water of the engine, is increased in the temperature thereof to about 65 deg.C by being reheated by the exhaust gas of the engine during passing through an auxiliary reheater 28 and is taken out of a cock 30 through the switching valve 29 usually for supplying the middle-temperature hot-water. In case the high-temperature hot-water should be taken out instantaneously upon starting the engine, the high-temperature hot-water of about 85 deg.C is taken out of the cock 31 by a method wherein the switching valve 29 is switched into a condition as shown by broken lines to introduce the middle-temperature water (below 55 deg.C) from the auxiliary reheater 28 into the heat exchanger 18 for reheating, thereafter, is heated to a high-temperature directly by the heating power of a combustor 13. |
