Investigations on the three-stage gas-coupled Stirling-type pulse tube cryocooler

27th International Cryogenics Engineering Conference and International Cryogenic Materials Conference 2018

Zha, Rui^1^2 ; Zhang, Tao^1^2 ; Li, Jiaqi^1^2 ; Tan, Jun^1^3 ; Zhao, Yongjiang^1^2 ; Zhao, Bangjian^1^2 ; Dang, Haizheng^1^3

State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, 500 Yutian Road, Shanghai

200083, China^1

University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing

100049, China^2

Shanghai Boreas Cryogenics Co. Ltd, 1388 Shuidian Road, Shanghai

200434, China^3

关键词: Dynamic pressures;    Electrical circuit;    Linear compressors;    Stirling type pulse tube cryocooler;    Temperature profiles;    Temperature-induced;    Theoretical modeling;    Volume flow rate;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/502/1/012038/pdf
DOI  :  10.1088/1757-899X/502/1/012038

来源: IOP

【 摘 要 】

This paper establishes a theoretical model of the three-stage gas-coupled SPTC based on the electrical circuit analogy (ECA) model. A further improved ECA model for the three-stage arrangement is proposed to achieve the dynamic pressure and volume flow rate at any position of each stage, in which the effects of both the real gas and the dynamic temperature are considered to improve the accuracy. The temperature profiles in regenerators are studied by considering the temperature-induced enthalpy flow rate. Based on the above theoretical analyses, a gas-coupled three-stage SPTC driven by a moving-coil linear compressor is developed and tested. A no-load temperature of 4.8 K and cooling capacity of 40 mW/6 K are achieved experimentally with a total input power of 320 W, which is a considerable improvement of performance compared with the thermally-coupled three-stage SPTC counterpart developed by the same authors.