Résumé
This paper presents experimental results using a permanent magnet magnetic refrigerator described at Thermag 2007. The use of gadolinium spheres (300 micrometers) rather than flakes and a method to ensure no air bubbles are trapped in the fluid flow system have resulted in significant improvements in performance. In addition, a new fluid flow system was created allowing for a lower system pressure drop and increased effectiveness in the cold heat exchanger. These modifications have increased temperature span and cooling power over all operating frequencies up to 4 Hz. The data acquisition system was upgraded to measure work input for the system and to determine COP. The peak, no-load temperature span using a total of 110 g of gadolinium has increased to 29°C, and the cooling power is over 3 times larger than in previous tests. Because of an improved refrigerant geometry, pressure drop has been halved. A COP of 1.6 was obtained for the entire system with a cooling power of 50 W and a temperature span of 2°C when operating at 1.4 Hz.
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Détails
- Titre original : Progress in the characterization and optimization of a permanent magnet magnetic refrigerator.
- Identifiant de la fiche : 2009-1640
- Langues : Anglais
- Source : 3rd International Conference on Magnetic Refrigeration at Room Temperature
- Date d'édition : 11/05/2009
Liens
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Indexation
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Thèmes :
Froid calorique (froid magnétocalorique, électrocalorique, élastocalorique et barocalorique);
Autres systèmes de production de froid (dessiccation, thermoélectricité, thermoacoustique...) - Mots-clés : Fluide actif; Amélioration; Réfrigerateur magnétique; Performance; Experimentation; Écoulement
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Measuring Nusselt number using a single-blow re...
- Auteurs : FRISCHMANN M., JACOBS S., NELLIS G., et al.
- Date : 11/05/2009
- Langues : Anglais
- Source : 3rd International Conference on Magnetic Refrigeration at Room Temperature
- Formats : PDF
Voir la fiche
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Heat transfer characteristics and cooling perfo...
- Auteurs : KAWANAMI T.
- Date : 11/04/2007
- Langues : Anglais
- Source : 2nd International Conference on Magnetic Refrigeration at Room Temperature
- Formats : PDF
Voir la fiche
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Numerical analysis of a reciprocative active ma...
- Auteurs : OLIVEIRA P. A., TREVIZOLI P. V., BARBOSA J. R. Jr, et al.
- Date : 11/05/2009
- Langues : Anglais
- Source : 3rd International Conference on Magnetic Refrigeration at Room Temperature
- Formats : PDF
Voir la fiche
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Study of the efficiency of a magneto-thermal sy...
- Auteurs : MULLER C., BOUR L., VASILE C.
- Date : 11/04/2007
- Langues : Anglais
- Source : 2nd International Conference on Magnetic Refrigeration at Room Temperature
- Formats : PDF
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Electromagnetic analysis of a multipole field s...
- Auteurs : BOUCHEKARA H., KEDOUS-LEBOUC A., DUPUIS C., et al.
- Date : 11/05/2009
- Langues : Anglais
- Source : 3rd International Conference on Magnetic Refrigeration at Room Temperature
- Formats : PDF
Voir la fiche