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Transfert de chaleur lors de l'ébullition libre du R116 à différentes pressions.

Pool boiling heat transfer of R116 at various pressures.

Auteurs : BAO J., GONG M., SUN Z., et al.

Résumé

As one component of the binary refrigerant mixture of R508 for two-stage cascade refrigeration systems, hexafluoroethane (R116) has been used for several decades. However, few pool boiling heat transfer data of it are available in the open published articles. Therefore, extensive studies on R116 pool boiling heat transfer were made in this work at various pressures from 0.1 to 0.9 MPa. Heat transfer coefficients of the nucleate pool boiling on a flat smooth copper surface were carefully measured. The uncertainties of the experiments were analyzed in details. Most efforts were made to know the pressure influence on the nucleate pool boiling heat transfer behaviour of R116. From the results of the experiments, when the pressure is lower than 0.3 MPa, the pool boiling heat transfer coefficient increase and reach the maximum at the pressure of 0.3 MPa, however, decrease when the pressure is higher than 0.3 MPa. Furthermore, some discussions were made based on the results of experiments.

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Pages : 2009-5

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  • Prix public

    20 €

  • Prix membre*

    Gratuit

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Détails

  • Titre original : Pool boiling heat transfer of R116 at various pressures.
  • Identifiant de la fiche : 2009-1930
  • Langues : Anglais
  • Source : 3rd Conference on Thermophysical Properties and Transfer Processes of Refrigerants
  • Date d'édition : 23/06/2009

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