Experimental study on a one-stage Vuilleumier cryocooler with large pressure ratio

A detailed experimental results of one-stage VM cryocooler with larger pressure ratio is presented and discussed in this paper. By increasing the stroke distance of hot displacer from 20 mm to 32 mm, the pressure ratio raised to 1.8 at the terminal temperature. Besides, TFL-spring combined with laby...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2017-02, Vol.171 (1), p.12077
Main Authors: Tong, Zhang, Changzhao, Pan, Liubiao, Chen, Wenxiu, Zhu, Yuan, Zhou, Junjie, Wang
Format: Article
Language:English
Subjects:
Helium
Liquid helium
Pressure ratio
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Summary:A detailed experimental results of one-stage VM cryocooler with larger pressure ratio is presented and discussed in this paper. By increasing the stroke distance of hot displacer from 20 mm to 32 mm, the pressure ratio raised to 1.8 at the terminal temperature. Besides, TFL-spring combined with labyrinth sealing was used on cold displacer. Finally, a no-load temperature of 7.55 K was attained and the cooling capacity is 1.98 W@15 K. Although the terminal temperature was not apparently improved, it still showed great potential to reach liquid helium temperature when adding an extra stage.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/171/1/012077