| 摘要 |
PURPOSE:To raise the energy efficiency, by combining plural Rankine cycles which are different from each other their actuation enthalpy ranges, with a single reverse Rankine cycle, and taking outward the energy at the polytropic expansion process of each of the Rankine cycles. CONSTITUTION:A reverse Rankine cycle in which a fluid A circulates through a compressor 3, a high temperature side heat exchanger 1, an expansion valve 4, a low temperature side heat exchanger 2 and a super-heater 9, and plural Rankine cycles in which fluids B, C circulate, are combined with each other. The temperature of the fluid in the heating process of each Rankine cycle is kept lower than the temperature of the fluid in the cooling process of the reverse Rankine cycle, and that in the cooling process of each RAnkine cycle is kept higher than that in the heating process of the reverse Rankine cycle. The end temperature of the heating process of the RAnkine cycle whose actuation enthalpy range is the lowest, is kept lower than the end temperature of the cooling process of the reverse Rankine cycle. Then, power is taken out from an expansion turbine 8 of each Rankine cycle. |
