Thermodynamic Analysis of G-M/J-T Helium Refrigeration Cycle for a Cryoadsorption Test Facility

A cryoadsorption test facility is developing for upgrade the cryopump of EAST neutral beam injector. To provide an optional cryogenic supply plan for the test facility, a Gifford-McMahon (G-M)/Joule-Thomson (J-T) helium refrigeration cycle is designed. In this paper, the influence of stage temperatu...

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Bibliographic Details
Published in:Journal of fusion energy 2015-10, Vol.34 (5), p.1188-1192
Main Authors: Liu, Zhi-min, Ma, Chang-cheng, Xie, Yuan-lai, Cui, Kui, Cheng, Bin, Hu, Chun-dong
Format: Article
Language:English
Subjects:
Cryogenic cooling
Cryopumping
Effectiveness
Energy Systems
Entropy
Equipment and supplies
Heat exchangers
Heating
Helium
Injectors
Neutral beams
Nuclear Energy
Nuclear Fusion
Original Research
Physics
Physics and Astronomy
Plasma Physics
Precooling
Refrigeration
Sustainable Development
Temperature
Test facilities
Thermodynamics
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Summary:A cryoadsorption test facility is developing for upgrade the cryopump of EAST neutral beam injector. To provide an optional cryogenic supply plan for the test facility, a Gifford-McMahon (G-M)/Joule-Thomson (J-T) helium refrigeration cycle is designed. In this paper, the influence of stage temperature of two-stages G-M cryocooler and J-T heat exchanger effectiveness on the performance of the cycle is thermodynamically analyzed. The results of the analysis make it clear that, for the cycle precooling power input, the temperature of cryocooler stages plays a very important role on cycle performance. And different operational J-T heat exchanger effectiveness and its thermal characteristics in the refrigeration cycle are also discussed.
ISSN:0164-0313
1572-9591
DOI:10.1007/s10894-015-9938-z