Multicomponent Gas Mixtures for J-T Cryocoolers

Arkhipov, V. T.; Yakuba, V. V.; Lobko, M. P.; Yevdokimova, Olena; Stears, H.

doi:10.1007/0-306-47090-x_58

Cited by 5 publications

(2 citation statements)

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“…The mixed-refrigerant Joule-Thomson (MRJT) cycles could dramatically increase cooling load while decreasing the operating pressures, compared with a pure refrigerant JT cycle [28]. Wu et al [29] first developed a new mixture refrigeration cycle with a simplified dephlegmator to build a refrigeration system with high efficiency, high reliability, and simple configuration.…”

Section: Introductionmentioning

confidence: 99%

Steady-state thermodynamic simulation and structural design of the dephlegmator used in mixed-refrigerant Joule-Thomson refrigerators

Gong

Guo

et al. 2016

Applied Thermal Engineering

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Section: Introductionmentioning

confidence: 99%

Steady-state thermodynamic simulation and structural design of the dephlegmator used in mixed-refrigerant Joule-Thomson refrigerators

Gong

Guo

et al. 2016

Applied Thermal Engineering

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“…For example, Nayak and Venkatarathnam [1] have reported exergy efficiencies of about 30% for cooling to 90 K with ARC system. Single stage cryocoolers, without phase separation, are much less complicated with the expense of having much lower exergy efficiency of a few percentage only [2][3][4][5][6][7]. Increasing the efficiency is also possible by adding a pre-cooling stage for the refrigerant [8][9][10][11] which complicates the whole cooling system.…”

Section: Introductionmentioning

confidence: 99%

Mixed-refrigerant Joule-Thomson (MR JT) mini-cryocoolers

Tzabar¹

2014

AIP Conference Proceedings

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Abstract. This paper presents the progress in our ongoing research on Mixed-Refrigerant (MR) Joule-Thomson (JT) cryocoolers. The research begun by exploring different MRs and testing various compressors: oil-lubricated and oil-free, reciprocating and linear, custom-made and commercial. Closed-cycle JT cryocoolers benefit from the fact that the compressor might be located far from the cold-end and thus there are no moving parts, no vibrations, and no heat emission near the cold-end. As a consequence, the compressor may be located where there are no severe size limitations, its heat can be conveniently removed, and it can be easily maintained. However, in some applications there is still a demand for a small compressor to drive a JT cryocooler although it is located far from the cooled device. Recently, we have developed a miniature oil-free compressor for MR JT cryocoolers that weighs about 700 g and its volume equals about 300 cc. The cryocooler operates with a MR that contains Ne, N 2 , and Hydrocarbons. This MR has been widely investigated with different compressors and varying operating conditions and proved to be stable. The current research investigates the performances of MR JT mini-cryocooler operating with the MR mentioned above, driven with our miniature compressor, and a cold-finger prototype. A Dewar with heat load of about 230 mW is cooled to about 80 K at ambient temperatures between 0°C and 40 °C. The experimental results obtained are stable and demonstrate the ability to control the cooling temperature by changing the rotation speed of the compressor.

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