Yoshikatsu Hiratsuka

Performance Characteristics of an Atmospheric Pulse Tube Refrigerator

The pulse tube refrigerator does not have moving parts in the cold section and has high reliability. So, it has already been used practically as a cryocooler. However, this type of refrigerator is not developed for residential freezer or air conditioner use. Then, an inertance type refrigerator, which used atmospheric pressure air for the working gas has been developed in order to examine the possibility of the refrigerator for the temperatures around 0 C. In this paper, the effect of inertance dimensions and the regenerator matrix on cool-down characteristic is examined experimentally. Additionally, effects of inertance length on COP and heat loss are analytically examined. As a result, the working gas temperature in the cold head has lowered from room temperature of about 55 C. The gas temperature in the cold head is -32 C.