RANKINE CYCLE DEVICE

摘要

A Rankine cycle system is provided in which temperature setting means (M1) sets the temperature of steam at the outlet of an evaporator (10) based on the temperature and the flow rate of exhaust gas at the inlet of the evaporator (10), and temperature control means (M2) then controls the temperature of the steam at the outlet of the evaporator (10) so that it is at the set temperature. Pressure setting means (M3) sets the pressure of steam at the inlet of an expander (11) based on the set temperature, and pressure control means (M4) then controls the pressure of the steam at the inlet of the expander (11) so that it is at the set pressure. It is thereby possible for the evaporator (10) to generate steam at a temperature at which the overall efficiency of the evaporator (10) and the expander (11) becomes a maximum and, moreover, it is possible to improve the efficiency of the expander (11) by supplying steam at a pressure that is optimum for the expansion ratio of the expander (11), thereby enhancing the performance of the Rankine cycle system. <IMAGE>