WASTE-HEAT-RECOVERY DEVICE

摘要

This waste-heat-recovery device is provided with a heat exchanger, an expander, an air-cooled condenser, a pump, an outside-air-temperature-detecting unit, a pressure detector, a released-heat-quantity-adjusting unit, and a controller. The heat exchanger transmits exhaust heat from a heat engine to a refrigerant. The expander expands the refrigerant and generates drive power. The condenser releases heat from refrigerant that has passed through the expander into the atmosphere. The pump delivers refrigerant that has passed through the condenser to the heat exchanger. The pressure detector detects the pressure of the refrigerant downstream from the expander and upstream from the pump. The released-heat-quantity-adjusting unit adjusts the amount of heat released from the condenser. The controller controls the released-heat-quantity-adjusting state of the released-heat-quantity-adjusting unit. The controller sets a target condensing pressure on the basis of the outside air temperature detected by the outside-air-temperature-detecting unit, and controls the released-heat-quantity-adjusting unit so that the pressure detected by the pressure detector is equal to the target condensing pressure.