ENGINE EXHAUST HEAT RECOVERY SYSTEM

摘要

[Problem] To provide an exhaust heat recovery system that is capable of effectively utilizing exhaust heat of an engine and protecting the engine and peripheral devices thereof. [Solution] An engine exhaust heat recovery system (1) is equipped with an engine (71). In addition, this system is equipped with a first cooler (3) that has a first cooling medium for cooling a first mechanism to be cooled of the engine (71) and performs heat-exchange of water having a first temperature, said water being output from a warm-water utilizing facility, with the first cooling medium in order to output water having a second temperature that is higher than the first temperature. In addition, this system is equipped with a heat exchanger (2) that performs heat-exchange of the water having the second temperature with the exhaust gas of the engine in order to output water having a third temperature that is higher than the second temperature and supplies the resulting water to the warm-water utilizing facility. In addition, this system is equipped with a first valve device (52) that causes the water having the first temperature to be supplied to the heat exchanger (2) when the temperature of the first cooling medium is lower than the temperature of the first cooler (3) on the side where the water having the first temperature is supplied.