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Validation expérimentale du modèle de transfert de chaleur transitoire entre un lit de particules magnétocaloriques et un fluide interstitiel stagnant.

Experimentally validated model of transient heat transfer between a magnetocaloric packed particle bed and stagnant interstitial fluid.

Numéro : pap. 2027

Auteurs : SCHROEDER M. G., BREHOB E., BENEDICT M.

Résumé

Typical simulations of packed bed active magnetocaloric regenerators rely on correlations of Nusselt number as a function of Reynolds number. These models are well understood for large ranges of Reynolds number, but experimental data is lacking as Reynolds number approaches zero. Within a typical magnetocaloric refrigeration cycle a zero fluid velocity or dwell condition is present. When a cycle is heat transfer rate limited, heat transferred during dwell represents a significant portion of total heat transferred for a full cycle and must be accurately represented. An experiment was performed in order to validate a basic heat transfer model between a packed magnetocaloric particle bed and stagnant interstitial fluid. A second experiment was performed to measure average particle sphericity using a modified version of the Ergun equation, such that both particle size and sphericity are known for use in the heat transfer model. Finally, a correction factor was applied to the model to reduce error when compared with experimental results.

Documents disponibles

Format PDF

Pages : 10 p.

Disponible

  • Prix public

    20 €

  • Prix membre*

    15 €

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

Détails

  • Titre original : Experimentally validated model of transient heat transfer between a magnetocaloric packed particle bed and stagnant interstitial fluid.
  • Identifiant de la fiche : 30018812
  • Langues : Anglais
  • Source : 2016 Purdue Conferences. 16th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Date d'édition : 11/07/2016

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