Efficiency improvements of a double acting reciprocating magnetic refrigerator

Continuing our work with gadolinium gallium garnet (GGG) after the previously obtained results of 1.2 W at 1.8 K and 45% of the Carnot cycle, we now have accomplished new steps using half of the volume of GGG, a more suitable field profile, improved heat transfer and we have obtained 0.9 W at 2.1 K...

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Bibliographic Details
Published in:Cryogenics (Guildford) 1983-01, Vol.23 (8), p.427-432
Main Authors: Lacaze, A.F., Beranger, R., Bon Mardion, G., Claudet, G., Lacaze, A.A.
Format: Article
Language:English
Subjects:
adiabatic demagnetization
cryogenics
gadolinium gallium garnet
heat pump
magnetic refrigeration
superfluid helium
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Summary:Continuing our work with gadolinium gallium garnet (GGG) after the previously obtained results of 1.2 W at 1.8 K and 45% of the Carnot cycle, we now have accomplished new steps using half of the volume of GGG, a more suitable field profile, improved heat transfer and we have obtained 0.9 W at 2.1 K with efficiency of 64%. We have also computed the competitive threshold values for a magnetic stage refrigerator.
ISSN:0011-2275
1879-2235
DOI:10.1016/0011-2275(83)90212-6