To efficiently recover waste heat from pressurized intake air.
A prime mover system 1 comprises: a prime mover 3; a supercharger 4; a first heat exchanger 5; and a waste heat recovery device 6. The supercharger 4 comprises a turbine 41, and a compressor 42. The prime mover 3 and the supercharger 4 are connected to each other by a scavenging passage 31 and an exhaust passage 32. The exhaust passage 32 comprises: a main exhaust passage 321 for introducing exhaust air from the prime mover 3 to the turbine 41; and a branch exhaust passage 322 branched from the main exhaust passage 321. Branch exhaust air that is one part of the exhaust from the prime mover 3 flow through the branch exhaust passage 322. The first heat exchanger 5 is provided on the branch exhaust passage 322 and the scavenging passage 31. The first heat exchanger 5 is a plate-type heat exchanger for gas-gas, and heats scavenging air flowing through the scavenging passage 31 with the branch exhaust air as a heat source. Thereby, a scavenging temperature becomes high, so that waste heat can be efficiently recovered from the scavenging air by the waste heat recovery device 6 and recovery power can be made large.
OKAZAKI YASUHIDE
YAGI KOTARO
MOTODA TAKAMITSU
FUKUYAMA MASAHISA
Tsutomu Tanaka
Masamichi Ida