Cryogenics2022，Vol.1238.DOI:10.1016/j.cryogenics.2022.103452

Investigations on a 1 K hybrid cryocooler composed of a four-stage Stirling-type pulse tube cryocooler and a Joule-Thomson cooler. Part B: Experimental verifications

Dang, Haizheng Zhang, Tao Zhao, Bangjian Zhao, Yongjiang Tan, Jun Tan, Han Xue, Renjun Wu, Shiguang Zhai, Yujia
Cryogenics2022，Vol.1238.DOI:10.1016/j.cryogenics.2022.103452
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  • NSTL
  • Elsevier

Investigations on a 1 K hybrid cryocooler composed of a four-stage Stirling-type pulse tube cryocooler and a Joule-Thomson cooler. Part B: Experimental verifications

Dang, Haizheng 1Zhang, Tao 1Zhao, Bangjian 1Zhao, Yongjiang 1Tan, Jun 1Tan, Han 1Xue, Renjun 1Wu, Shiguang 1Zhai, Yujia1
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作者信息

  • 1. Chinese Acad Sci
  • 折叠

Abstract

In this part, a hybrid cryocooler composed of a four-stage Stirling-type pulse tube cryocooler (SPTC) and a Joule Thomson cryocooler (JTC) is worked out to verify the theoretical analyses carried out in Part A. The heat loss on each precooling stage is calculated to evaluate the feasibility of thermal coupling between the SPTC and the JTC. The JT compressors are tested and then the compression capacity is studied. A bypass-accelerated-cooling approach is adopted to speed up the cool-down process. The experimental results show that with He-4 in the SPTC and He-3 in the JTC, a no-load temperature of 1.36 K is reached when the three precooling temperatures are kept at 71.2 K, 40.5 K and 8.12 K, respectively. The cooling capacity of 13.9 mW at 1.8 K is measured with the JT loop high pressure and the last stage precooling temperature being at 0.5 MPa and 8.1 K, respectively. Satisfactory agreements are observed between theoretical and experimental studies.

Key words

1 K hybrid cryocooler/Four-stage Stirling-type pulse tube cryocooler/Joule-Thomson cooler/Experimental verifications

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出版年

2022
Cryogenics

Cryogenics

EISCI
ISSN：0011-2275
被引量6
参考文献量4
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