Abstract
A Stirling cycle machine is a closed regenerative cycle machine realized as external-combustion machines in various applications including engines and coolers, using refrigerants, such as helium, which have no impact on the depletion of the ozone layer and global warming. Stirling coolers are much suitable for use at ultra-low temperatures from -180℃ to -50℃ in the field of refrigeration. The authors have developed a prototype Stirling cooler and cooling unit (Stirling unit) which consists of the Stirling cooler, a secondary heat transfer fluid circuit and a radiator to reject heat from the Stirling cooler. The paper describes results of evaluation for cooling method of cylinder block including piston rings and influence of driving frequency on the Stirling unit performance.
