The study on a gas-coupled two-stage stirling-type pulse tube cryocooler

[摘要] A two-stage gas-coupled Stirling-type pulse tube cryocooler (SPTC) driven by a linear dual-opposed compressor has been designed, manufactured and tested. Both of the stages adopted coaxial structure for compactness. The effect of a cold double-inlet at the second stage on the cooling performance was investigated. The test results show that the cold double-inlet will help to achieve a lower cooling temperature, but it is not conducive to achieving a higher cooling capacity. At present, without the cold double-inlet, the second stage has achieved a no-load temperature of 11.28 K and a cooling capacity of 620 mW/20 K with an input electric power of 450 W. With the cold double-inlet, the no-load temperature is lowered to 9.4 K, but the cooling capacity is reduced to 400 mW/20 K. The structure of the developed cryocooler and the influences of charge pressure, operating frequency and hot end temperature will also be introduced in this paper.

[发布机构] Chinese Academy of Sciences Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Beijing; 100190, China^1;University of Chinese Academy of Sciences, Beijing; 100049, China^2

[效力级别] 物理学 [学科分类] 材料科学（综合）

[关键词] Charge pressure;Co-axial structures;Cooling Capacity;Cooling performance;Cooling temperature;End temperatures;Operating frequency;Stirling type pulse tube cryocooler