Rankine cycle apparatus, combined heat and power system, and operation method of Rankine cycle apparatus

摘要

The Rankine cycle device (20A) includes a pump (23), an evaporator (24), an expander (21), a condenser (22), and an internal heat exchanger (25). The internal heat exchanger (25) exchanges heat between the working fluid discharged from the expander (21) and the working fluid discharged from the pump (23). The temperature of the working fluid at the inlet of the expander (21) is set so that the temperature of the working fluid at the outlet of the expander (21) is higher than the saturation temperature on the high pressure side of the cycle.