Journal
INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID
Volume 67, Issue -, Pages 330-335Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ijrefrig.2016.02.021
Keywords
Hybrid refrigerator; Magnetic refrigeration; Stirling cycle refrigeration; Cooling performance; Phase angle
Categories
Funding
- National Natural Science Foundation of China [51271192, 51322605]
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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. (C) 2016 Elsevier Ltd and IIR. All rights reserved.
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