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Cryocoolers 11 pp 265-272 | Cite as

Numerical Study of a New Type of 4 K GM/PT Hybrid Refrigerator

  • Liqiang Liu
  • Linghui Gong
  • Jingtao Liang
  • Liang Zhang
Chapter
  • 1.2k Downloads

Abstract

A new type of hybrid refrigerator operating in the liquid helium temperature region has been proposed. The warm stage of this refrigerator is a typical G-M refrigeration cycle, on which the cold stage of a pulse tube cooler is coupled thermodynamically. The phase shift structures for the pulse tube are supported at the temperature of the G-M refrigeration stage. There are several methods that can be applied as the phase shifter for the pulse tube; for example, a cold piston that is connected to the displacer of the G-M refrigerator. Physical and mathematical models have been established to describe the unique thermophysical aspects of this type of refrigerator, and numerical methods have been employed to solve the theoretical models. Through the calculations, some helpful results have been obtained, and the structure of the refrigerator has been optimized. Experimental evaluation is now underway.

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References

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    Li, R., “Great Process in Magnetic Regenerator Material and 4K G-M Cryocooler,” Proceedings of ICCR’98, International Academic Publishers, Beijing (1998), pp. 67–73.Google Scholar
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    Wang, C., Thummes, G., and Heiden, C., “A Two Stage Pulse Tube Cooler Operating below 4K,” Cryogenics, vol. 37, no. 3 (1997), pp. 159.CrossRefGoogle Scholar
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    Kays, W.M. and London, A.L., Compact Heat Exchanger, 2nd ed., McGraw-Hill, New York (1964).Google Scholar

Copyright information

© Kluwer Academic Publishers 2002

Authors and Affiliations

  • Liqiang Liu
    • 1
  • Linghui Gong
    • 1
  • Jingtao Liang
    • 1
  • Liang Zhang
    • 1
  1. 1.Cryogenic LaboratoryChinese Academy of SciencesBeijingChina

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