Study of highly efficient gas engine driven heat pump system with cascaded use of exhaust heat from engine

With their background of energy-serving and environmental attributes, the gas-engine driven heat pump (GHP) is growing in popularity. Of course, the high efficiency of GHP is demanded to able to cope with environmental problems and energy issues. As for GHP, not only more highly efficient devices such as the engine and compressor, but also exhaust heat recovery forms an effective method for improving efficiency. This paper describes the high efficient system, utilizing exhaust heat from GHP, in both cooling and heating operations.