POWER RECOVERY DEVICE AND POWER RECOVERY METHOD

摘要

PROBLEM TO BE SOLVED: To provide a power recovery device improved in power recovery efficiency.SOLUTION: The power recovery device 1 includes an evaporator 11, an expander 12 downstream of the evaporator 11, a condenser 14 downstream of the expander 12, a heater 16 upstream of the evaporator 11, a container 15 downstream of the condenser 14 and upstream of the heater 16, a first liquid feeding pump 17 for feeding liquid from the condenser 14 to the container 15, a second liquid feeding pump 18 for feeding liquid to the heater 16 from the lower section of the container 15, an opening and closing valve 20 for opening/closing the distribution path of working fluid in the vapor phase between the upper section of the container 15 and the heater 16, and a check valve 21 disposed on the upstream side of the evaporator 11 to distribute the working fluid in the flowing direction in the evaporator 11. The first operating state in which the opening and closing valve 20 is closed to actuate the first liquid feeding pump 17, and the operation of the second liquid feeding pump 18 is stopped, and the second operating state in which the opening and closing valve 20 is opened, the operation of the first liquid feeding pump 17 is stopped, and the second liquid feeding pump 18 is operated, are repeated.