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Study on 4K-GM refrigerator: effects of specific heat of regenerator material on refrigeration capacity.

Author(s) : INAGUCHI T., NAGAO M., NAKA K., et al.

Type of article: Article

Summary

When the specific heat of the regenerator material is changed from 1.5 J to 0.01 J/ (K.cm3), the no-load temperature is changed from 2.11 to 26.9 K. The lowest temperature that can be theoretically attained in this refrigerator is the temperature around the lambda point of helium. It is sufficient for the regenerator material to provide a specific heat of 0.8 J/(K.cm3). The refrigeration capacity is found to be superior over a wider temperature range when the specific heat distribution is uniform than when it has a peak. When different kinds of regenerator materials are stacked, the material stacked at the cold part of the regenerator may have a low specific heat at high temperatures, but the material stacked at the hot part of the regenerator should have a high specific heat at low temperatures.

Details

  • Original title: Study on 4K-GM refrigerator: effects of specific heat of regenerator material on refrigeration capacity.
  • Record ID : 2001-0003
  • Languages: English
  • Source: JSME int. J., B - vol. 43 - n. 1
  • Publication date: 2000/02
  • Document available for consultation in the library of the IIR headquarters only.

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