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

摘要

A Rankine cycle apparatus (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) allows heat exchange to take place between the working fluid discharged from the expander (21) and a working fluid discharged from the pump (23). A temperature of the working fluid at an inlet of the expander (21) is set so that a temperature of the working fluid at an outlet of the expander (21) be higher than a saturation temperature on a high-pressure side of the cycle.