Thermodynamic Optimization of Helium Liquefaction Cycles

Hubbell, Richard H.; Toscano, W. M.

doi:10.1007/978-1-4613-9856-1_65

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G-m/j-t Helium Refrigeration Cycle1

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2019

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Cited by 9 publications

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“…And Fig. 2 illustrates the entropy generation concept technique is shown in the TemperatureEntropy (T-S) diagram [5][6][7][8]. The cycle is comprised of seven heat exchangers (four counterflow heat exchangers, two stage heat exchanger and one LN 2 precooling heat exchanger) which is identified as EX1, EX2… EX7, G-M cryocooler and J-T valve.…”

Section: G-m/j-t Helium Refrigeration Cyclementioning

confidence: 99%

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

Liu

Xie

et al. 2015

J Fusion Energ

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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.

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Section: G-m/j-t Helium Refrigeration Cyclementioning

confidence: 99%