THERMAL ENERGY RECOVERY DEVICE AND CONTROL METHOD

摘要

A thermal energy recovery device includes: a circulating flow path connected to a heater, an expander, a condenser and a circulating pump for circulating a working medium; a bypass valve in a bypass path connecting the upstream side region and the downstream side region of the expander in the circulating flow path; a power recovery machine connected to the expander; a circulating pump sending the working medium condensed in the condenser to the heater; a cooling medium pump sending a cooling medium to the condenser; an upstream side sensor detecting the pressure/temperature of the working medium on the expander upstream side in the circulating flow path; and a controller controlling the bypass valve and the cooling medium pump. The controller opens the bypass valve after stopping the circulating pump, and drives the cooling medium pump if the pressure/temperature of the working medium on the expander upstream side exceeds a threshold.

主权项

1. A thermal energy recovery device comprising:
a heater which heats a working medium by exchanging heat between a heat medium and the working medium; an expander into which the working medium flowed out from the heater flows; a power recovery machine connected to the expander; a condenser which condenses the working medium flowed into from the expander by heat exchange with a cooling medium; a circulating pump which sends the working medium condensed in the condenser to the heater; a circulating flow path which connects the heater, the expander, the condenser and the circulating pump and through which the working medium circulates; a bypass path which connects the region on the upstream side than the expander, in the circulating flow path, and the region on the downstream side than the expander; a bypass valve provided in the bypass path; a cooling medium pump which sends the cooling medium to the condenser; and a controller, wherein the controller executes a communication control that is a control for communicating the heater and the condenser via the bypass path by opening the bypass valve, in order to condense the working medium evaporated in the heater, when the stoppage of the circulating pump is detected.