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Document IIF

Evaluation des phénomènes de désaimantation sur la performance d'un régénérateur actif magnétique.

Assessment of demagnetization phenomena in the performance of an active magnetic regenerator.

Auteurs : TREVIZOLI P. V., BARBOSA J. R. Jr, OLIVEIRA P. A., et al.

Type d'article : Article, Article de la RIF

Résumé

The primary objective of this paper is to quantify the impact of the internal magnetic field and reversibility of the magnetocaloric effect on the numerical evaluation of the thermal performance of a parallel-plate active magnetic regenerator. To this end, direct measurements of the adiabatic temperature change of commercial-grade gadolinium samples were carried out for an applied field change of 1.65 ± 0.03 T (for both magnetization and demagnetization) and temperatures between 283 and 303 K. The tests were carried out in a specially constructed apparatus and the results were in good agreement with the literature. The data were incorporated into a mathematical model for solving the fluid flow and conjugated heat transfer in the parallel-plate regenerator. It was found that if demagnetization phenomena (i.e., the demagnetization factor and the reversibility of the magnetocaloric effect) are not take properly into account, the thermal performance of the regenerator can be severely over-predicted.

Documents disponibles

Format PDF

Pages : 1043-1054

Disponible

  • Prix public

    20 €

  • Prix membre*

    Gratuit

* meilleur tarif applicable selon le type d'adhésion (voir le détail des avantages des adhésions individuelles et collectives)

Détails

  • Titre original : Assessment of demagnetization phenomena in the performance of an active magnetic regenerator.
  • Identifiant de la fiche : 30004125
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 35 - n. 4
  • Date d'édition : 06/2012

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