Numerical Study of a 10 K Two Stage Pulse Tube Cryocooler with Precooling Inside the Pulse Tube

High efficiency cryocoolers working below 10 K have many applications such as cryo-pump, superconductor cooling and cryogenic electronics. This paper presents a thermally coupled two-stage pulse tube cryocooler system and its numeric analysis. The simulation results indicate that temperature distrib...

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Published inIOP conference series. Materials Science and Engineering Vol. 171; no. 1; pp. 12071 - 12076
Main Authors Xiaomin, Pang, Xiaotao, Wang, Wei, Dai, Jianyin, Hu, Ercang, Luo
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.02.2017
Subjects
Cryogenic cooling
Cryopumping
Efficiency
Heat exchangers
Numerical analysis
Precooling
Pulse tubes
Temperature distribution
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Summary:High efficiency cryocoolers working below 10 K have many applications such as cryo-pump, superconductor cooling and cryogenic electronics. This paper presents a thermally coupled two-stage pulse tube cryocooler system and its numeric analysis. The simulation results indicate that temperature distribution in the pulse tube has a significant impact on the system performance. So a precooling heat exchanger is put inside the second stage pulse tube for a deep investigation on its influence on the system performance. The influences of operating parameters such as precooling temperature, location of the precooling heat exchanger are discussed. Comparison of energy losses apparently show the advantages of the configuration which leads to an improvement on the efficiency. Finally, the cryocooler is predicted to be able to reach a relative Carnot efficiency of 10.7% at 10 K temperature.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/171/1/012071