| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a steam generator of high energy efficiency, for generating steam without using fuel. Ž<P>SOLUTION: This steam generator 1 includes a first heat pump 2 configuring a first refrigerant circulation flow channel 8 provided with a first compressor 4, a first condenser 5, a first expansion valve 6 and a first evaporator 7, and enclosing a first refrigerant, a second heat pump 3 configuring a second refrigerant circulation flow channel 14 provided with a second compressor 10, a second condenser 11, a second expansion valve 12 and a second evaporator 13, and enclosing a second refrigerant, and an intermediate fluid circulation flow channel 19 for circulating an intermediate fluid through the first condenser 5 and the second evaporator 13. The first refrigerant is heated by heat source fluid in the first evaporator 7, the intermediate fluid is heated by the first refrigerant in the first condenser 5, the second refrigerant is heated by the intermediate fluid in the second evaporator 13, and the water is heated and evaporated by the second refrigerant in the second condenser 11. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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