Waste heat recovery device and waste heat utilization system

摘要

PROBLEM TO BE SOLVED: To provide a waste-heat recovery unit capable of efficiently utilizing waste-heat.SOLUTION: A heat receiving part 17 is provided with a heat transport part 19. The heat transport part 19 is a location where heat received by the heat receiving part 17 is transferred to a heat radiation part 21b and the like to be described later. The heat transport part 19 is a heat pipe, for example. The heat transport part 19 is provided with heat radiation parts 21a, 21b. Upon receiving heat at the heat receiving part 17, the heat is transmitted to the heat transport part 19. The heat flowed into the heat transport part 19 is mainly transported to the heat radiation part 21b under a usual state. The heat radiation part 21b radiates heat to cooling water flowing in a cooling water passage 7. In this case, the heat receiving part 17 in this invention is constituted by a heat control member where its coefficient of thermal conductivity is decreased due to increasing in temperature. The heat receiving part 17 is made of aluminum nitride, for example. As a heat control member, it is preferable that a thermal conductivity at 25°C, for example, is 130 W/m.K or more and a thermal conductivity at 800°C is 50 W/m.K or less.