30 May 2005
The heat recovery in multi heat pump system using engine as a prime mover for heating and
cooling the building was investigated. The quantities of heat which can be recovered from engine was
measured and analyzed depending on heat recovery devices such as the cooling jacket, manifold, and heat
exchanger. In order to utilize the exhaust gas from engine properly and effectively, heat recovery system
performance was also compared according to the cooling water flow direction and the types of exhaust
gas heat exchanger. In this study, the 67~69 % heat recovery rate from engine wastes was obtained.