Refrigeration Capacity of a GM Refrigerator with Magnetic Regenerator Materials

  • T. Tsukagoshi
  • H. Nitta
  • A. Yoshida
  • K. Matsumoto
  • T. Hashimoto
  • T. Kuriyama
  • M. Takahashi
  • Y. Ohtani
  • H. Nakagome
Part of the A Cryogenic Engineering Conference Publication book series (ACRE, volume 41)

Abstract

An investigation was made of the refrigeration capacity of a two-stage Gifford-McMahon (GM) refrigerator using a layer structural regenerator (multilayer regenerator) with magnetic regenerator materials.

To prove the effectiveness of the multilayer regenerator, we made two kinds of second regenerators with magnetic materials: a triplelayer regenerator with Er0.75Gd0.25Ni (a new magnetic regenerator material), Er3Co and Er0.9Yb0.1Ni, and a doublelayer regenerator with Er3Co and Er0.9Yb0.1Ni. We calculated the regenerator efficiency of the triplelayer regenerator using computer simulation to determine its optimum structure. We then made two kinds of second regenerators and their refrigeration capacities were experimentally compared.

From the experimental results we will discuss the optimum structure of the regenerator.

Keywords

Entropy Nickel Enthalpy Helium Liquefaction 

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References

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    H.O. McMahon and W.E. Gifford, A New Low-Temperature Gas Expansion Cycle part I, Adv. in Cryog. Eng., 5:354 (1960).Google Scholar
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    T. Kuriyama et al., Helium Liquefaction by a Two-Stage Gifford-McMahon-Cycle Refrigerator Using New Regenerator Material of Er3Ni, Jpn. J. Appl. Phys., 31:L1206 (1992).CrossRefGoogle Scholar
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    T. Hashimoto et al., Effect of High Entropy Magnetic Regenerator Materials on Power of the GM Refrigerator, Adv. in Cryog. Eng., 40A:655 (1994).Google Scholar
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Copyright information

© Plenum Press, New York 1996

Authors and Affiliations

  • T. Tsukagoshi
    • 1
  • H. Nitta
    • 1
  • A. Yoshida
    • 1
  • K. Matsumoto
    • 1
  • T. Hashimoto
    • 1
  • T. Kuriyama
    • 2
  • M. Takahashi
    • 2
  • Y. Ohtani
    • 2
  • H. Nakagome
    • 2
  1. 1.Tokyo Institute of TechnologyDept. Appl. Phys.Oh-okayama MeguroJapan
  2. 2.Toshiba R and D CenterToshiba Co.Ukishima-cho, Kawasaki KanagawaJapan

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