Study on 4K-GM Refrigerato. (Effects of Specific Heat of Regenerator Material on Refrigeration Capacity).
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概要
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This paper describes an analysis of the effects of the specific heat of the regenerator material on the refrigeration capacity of a 4K GM refrigerator. The facts revealed by the analysis are given below. When the specific heat of the regenerator material is changed from 1.5 J/(K·cm<SUP>3</SUP>) to 0.01 J/(K·cm<SUP>3</SUP>), the no load temperature is changed from 2.11 K to 26.9 K. The lowest temperature that can be theoretically attained in this refrigerator is the temperature around the λ point of helium. The specific heat of the regenerator material reaches a sufficient level at 0.8 J/(K·cm<SUP>3</SUP>). The refrigeration capacity is found to be superior over a wide temperature range when the specific heat distribution is uniform than when it has a peak. When regenerator materials of different types are stacked in stratified formation, the material stacked at the cold part of the regenerator may have a small specific heat at high temperatures, but the material stacked at the hot part of the regenerator should desirably have a large specific heat at low temperatures.
- 一般社団法人 日本機械学会の論文
一般社団法人 日本機械学会 | 論文
- PREFACE
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