| 摘要 |
PURPOSE: To lower a temperature of heated cooling water to a fixed temperature or less by conducting pressure release accompanied with evaporation at at least two stages. CONSTITUTION: When a turbocompressor 12 provided with two compressor stages 12 and a cooler 14 which water is loaded with water as a coolant is operated, the water is heated under a pressure higher than its saturation pressure and at a temperature exceeding 100 deg.C, then the pressure is released to an ambient pressure, and water is added additionally to the evaporated water thereby. The pressure release in accompaniment with the evaporation is conducted at at least two stages in this case. The first evaporation vessel 30 for the first pressure release of the water is provided therefor, and the second evaporation vessels 32, 33 for the pressure release of the remaining cooling water are provided. A temperature of the heated cooling water is lowered thereby to 100 deg.C or less, because a negative pressure dominant in the evaporation vessel is below the ambient pressure. |
