低温工学
Online ISSN : 1880-0408
Print ISSN : 0389-2441
ISSN-L : 0389-2441
42 巻, 10 号
選択された号の論文の4件中1~4を表示しています
巻頭言
解説
基礎講座
  • —極低温冷凍機の基礎—
    松原 洋一
    2007 年 42 巻 10 号 p. 346-353
    発行日: 2007/10/25
    公開日: 2008/10/28
    ジャーナル フリー
    Part VI, the final part of this study, covers the multi-stage expansion cycle. The thermodynamic mechanism of the minimum attainable temperature is described by means of a single-stage expansion method. A simplified computer simulation model has been developed for the multi-stage expansion cycle. An example calculation for a two-stage Stirling cooler and GM-type pulse-tube cooler is performed. The effect of real gas properties and specific heat of the regenerator material are discussed, as well as operating conditions such as pressure ratio and frequency. The final section of this study discusses the Vuilleumier cycle, which is not widely utilized in the application field of cryocoolers. In the future, however, this method, in conjunction with a thermo-acoustic resonating system, might have some potential from the viewpoint of long life or low-cost coolers because of its simplicity.
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