To increase the efficiency of heat transport.
A waste heat recovery system comprises: a boiling device which makes a refrigerant into steam by waste heat of an engine; a heat exchanger which is provided at a heating object and to which the refrigerant made into the steam is introduced; a steam passage which connects the boiling device with the heat exchanger and in which the refrigerant made into the steam by the boiling device circulates; a condensed refrigerant passage which connects the boiling device with the heat exchanger and in which the condensed refrigerant circulates; a first valve provided at the steam passage; and a second valve provided at the condensed refrigerant passage. When at least one of a temperature and a pressure of the steam in the steam passage exceeds a predetermined threshold value, the first valve opens and the second valve opens after the first valve opens.
Toshiyuki Hatta
High Yoshitaka Hayashi