Abstract
KUBOTA has been developing a Stirling heat pump using dual input both shaft power and heat power. This machine is a heat-assisted Stirling heat pump and is 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 of the heat pump. The tests were performed at various ratios of heat power to shaft power, heat input temperatures, and output temperature conditions. It was shown that the heat pump was applicable for various driving sources such as a gas engine and a gas turbine, and the heat pump had high performance as a freon-free system at various operating conditions.
