Active-Buffer Pulse-Tube Refrigerator

摘要

This paper introduces a highly efficient GM-type active-buffer pulse-tube refrigerator. Burffers are connected to the hot end of the pulse-tube through on/off valves. Gas flow between the pulse-tube and the buffers is controlled by opening and closing these valves. A prototype single stage active-buffer pulse-tube refrigerator has been made and tested. Cooling power of 160 W at 80 K was achieved wit input power of 3.65 kW. The percent Carnot was 11 percent at 80K. The lowest temperature achieved was 28 K.