Hydraulically Operated Two-Phase Helium Expansion Engine

Johnson, Rolland; Collins, S.; Smith, J. L.

doi:10.1007/978-1-4757-0244-6_21

Cited by 22 publications

(2 citation statements)

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“…The MIT Model 2000 liquefier was built with a supercritical wet expander connected in parallel with the normal J-T valve [10]. The expander was operated by an electrohydraulic system rather then by a more conventional mechanical crank and cams.…”

Section: The Current Liquefaction Facilitymentioning

confidence: 99%

50 years of helium liquefaction at the MIT Cryogenic Engineering Laboratory

Smith¹

2002

AIP Conference Proceedings

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The evolution of the helium liquefaction facility of the MIT Cryogenic Engineering Laboratory and the history of its operation over the last 50 years are described. Professor Samuel C. Collins created the liquid-helium facility based on his earlier developments. The chronology of the Laboratory helium liquefiers is given with a brief description of each one. The current facility based on the Model 2000 liquefier is described and operating experience is given. The reasons for the very high availability of the liquefaction system are developed.

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Section: The Current Liquefaction Facilitymentioning

confidence: 99%

50 years of helium liquefaction at the MIT Cryogenic Engineering Laboratory

Smith¹

2002

AIP Conference Proceedings

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“…Onnes produced liquid helium in 1908 and tried to determine the helium's triple point 1 . In 1946, S.C. Collins designed a system that can produce liquid helium (LHe) without using external cryogen 2 ; later, in 1967, his refrigerator could provide LHe at 1.85 K. He also showed that using the piston expander instead of the valve can significantly increase the production of liquid helium 3 . The 300 W and 1.8 K helium refrigerator, which had two stages of expansion and eight dry vacuum pumping stages, is investigated 4 .…”

Section: Introductionmentioning

confidence: 99%

Investigation of a new energy‐efficient cryogenic process configuration for helium extraction and liquefaction

2021

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Summary This study's main focus is to simulate and design a novel cryogenic system that produces liquid helium. The novelty of this research has two main parts: first, this system is able to produce large amounts of liquid helium at atmospheric pressure, and second, from an energy consumption point of view, it performs better than other processes of liquid helium production. The first and second laws of thermodynamic are used to investigate this process. In this novel cryogenic process, liquid helium is produced at three stages; first, the mainstream contains some helium enter to helium upgrader to increase helium concentration. After that, the stream with high helium concentration enters to pressure swing adsorption process, and pure helium is obtained. Finally, pure helium enters to cryogenic process and is liquified in an expander. The network consumption in this system is equal to 18.66 MW, and the proposed system's exergy efficiency is obtained at 23.4%. Also, the results show that this system can produce 196.5 kg/h liquid helium. In this research, Aspen HYSYS V10 and MATLAB software are used to simulate this cryogenic process. Finally, numerical assessment is done on the key parameters that influence the performance of the process.

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Cryotechnology and Cryopumps

Day

2016

Handbook of Vacuum Technology

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Hydraulically Operated Two-Phase Helium Expansion Engine

Cited by 22 publications

References 1 publication

50 years of helium liquefaction at the MIT Cryogenic Engineering Laboratory

50 years of helium liquefaction at the MIT Cryogenic Engineering Laboratory

Investigation of a new energy‐efficient cryogenic process configuration for helium extraction and liquefaction

Cryotechnology and Cryopumps

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