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Improvements of a room-temperature magnetic refrigerator combined with Stirling cycle refrigeration effect.

Author(s) : GAO X. Q., SHEN J., HE X. N., et al.

Type of article: Article, IJR article

Summary

A high pressure hybrid refrigerator that combines the active magnetic refrigeration effect with the Stirling cycle refrigeration effect at room temperature is studied here. In the apparatus, a helium-gas-filled alfa-type Stirling refrigerator uses Gd sheets as the regenerator and the regenerator is put in a magnetic field varying from 0 to 1.4 T, which is provided by a Halbach-type rotary permanent magnet assembly. With an operating pressure of 5.5?MPa and a frequency of 2.5?Hz, a no-load temperature of 273.8?K was reached in 9 minutes, which is lower than that of 277.6?K for pure Stirling cycle. For the hybrid operation, cooling powers of 40.3 W and 56.4 W were achieved over temperature spans of 15?K and 12?K, respectively. For the latter case, the cooling power improves by 28.5% if compared with that exploiting only the Stirling cycle refrigeration effect.

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Pages: 330-335

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Details

  • Original title: Improvements of a room-temperature magnetic refrigerator combined with Stirling cycle refrigeration effect.
  • Record ID : 30017781
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 67
  • Publication date: 2016/07

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