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Free-piston Stirling cryocooler (FPSC) for low-temperature applications down to 110 K.

Author(s) : PARK J., KIM H., KO J., IN S., HONG Y., YEOM H., PARK S.

Type of article: IJR article

Summary

This research paper describes the experiments and demonstrations of the free-piston Stirling cryocooler (FPSC) we developed. Driven with an oil-free linear compressor, the FPSC is thoroughly tested with various cold-end temperatures between 110 K and 190 K, absorbing 1.03 kW heat at cold-end temperature of 110 K with electric input of 8 kW. The resulting cooler efficiency is estimated to be 0.13 considering a compression efficiency of 0.75. The experimental results are analyzed with a pre-developed numerical model that considers not only the thermodynamics of the working fluid of the FPSC but also the mechanical behavior of the reciprocating piston and displacer by introducing a fictitious damping coefficient to the equation of motion. The numerical model is able to predict the physical variables of the FPSC within 10% deviation under various cold-end temperature conditions. Thanks to the flexibility in regulating its cold-end temperature, the FPSC can be utilized for various applications, i.e., liquefied natural gas (LNG), semiconductor etching, bio/reagent preservation applications, etc. Finally, the FPSC is integrated as a major part of a small-scale liquefier to demonstrate the feasibility of liquefaction of natural gas (NG).

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Pages: 218-229

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Details

  • Original title: Free-piston Stirling cryocooler (FPSC) for low-temperature applications down to 110 K.
  • Record ID : 30027523
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 117
  • Publication date: 2020/09
  • DOI: http://dx.doi.org/10.1016/j.ijrefrig.2020.04.020
  • Document available for consultation in the library of the IIR headquarters only.

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