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Numerical model for a microchannel gas cooler with any refrigerant circuitry.

Modèle numérique pour un refroidisseur de gaz à microcanaux pour tous les types de circuits de frigorigène.

Numéro : pap. ID: 300

Auteurs : MARTÍNEZ-BALLESTER S., CORBERÁN J. M., GONZÁLVEZ-MACIÁ J.

Résumé

This work presents a gas cooler model (Fin1Dx3) working with CO2 in transcritical conditions for air-to-refrigerant microchannel heat exchangers with any refrigerant circuitry. The model applies a segment-by-segment discretization to the heat exchanger adding, in each segment, a specific bi-dimensional grid to the fluids flow, fin and tube wall. This methodology allows accounting for: 2D longitudinal heat conduction in the tube wall, the heat conduction between tubes along the fin, and the unmixed air influence on the heat capacity. The paper presents a short description of the heat exchanger discretization and the governing equations employed. The model has been validated against experimental data resulting in predicted capacity errors within ±2%. Differences on prediction results and computational cost were studied and compared with the previous authors’s model, the Fin2D model. Simulation time of the proposed model was reduced one order of magnitude respect the Fin2D’s time.

Documents disponibles

Format PDF

Pages : 8 p.

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 : Numerical model for a microchannel gas cooler with any refrigerant circuitry.
  • Identifiant de la fiche : 30002438
  • Langues : Anglais
  • Source : Proceedings of the 23rd IIR International Congress of Refrigeration: Prague, Czech Republic, August 21-26, 2011. Overarching theme: Refrigeration for Sustainable Development.
  • Date d'édition : 21/08/2011

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