Abstract
KUBOTA developed a Stirling heat pump system using dual input both shaft power and heat power. This system consists of an efficient gas engine and a heat-assisted Stirling heat pump constructed as two sets of three-cylinder machines, each a combination of two Stirling sub-systems; one a power producer and one a heat pump. This paper describes performance characteristics of the heat pump system and an approach to place it to practical usage. Since this Stirling heat pump is able to match with various heat balance, it is applicable for various driving sources such as a gas engine and a micro gas turbine. And the performances show that it will be an efficient engine driven freon-free heat pump system.
