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Carnot magnetic refrigerator operating between 1.4 and 10 K.

Author(s) : NUMAZAWA T., KIMURA H., SATO M., MAEDA H.

Type of article: Article

Summary

A magnetic refrigerator operating directly from 10 to 1.4 K has been constructed and tested. The refrigerator is a static system which operates following the Carnot cycle using a pulsed magnet and thermal switches. Typical experimental results were 550 milliwatts at 4.5 K using a dysprosium(3)-aluminium(5)-oxygen(12) refrigerant and 100 milliwatts at 1.8 K using gadolinium(3)-gallium(5)-oxygen(12). Without a cooling load, the lowest temperature obtainable was 1.36 K. The Carnot efficiencies were 30% at 2.0 K and 38% at 4.4 K. A cooling test for a superconducting magnet was also performed.

Details

  • Original title: Carnot magnetic refrigerator operating between 1.4 and 10 K.
  • Record ID : 1994-0001
  • Languages: English
  • Source: Cryogenics - vol. 33 - n. 5
  • Publication date: 1993/05

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