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Evaluation expérimentale des coefficients de transfert lors de l'évaporation du R22 et du R407C dans une installation à compression de vapeur.

Experimental evaluation of R22 and R407C evaporative heat transfer coefficients in a vapour compression plant.

Auteurs : APREA C., DE ROSSI F., GRECO A.

Type d'article : Article, Article de la RIF

Résumé

The mean heat transfer coefficients of R22 and R407C in the coaxial counterflow evaporator (20 mm ID) of a refrigerating vapour compression plant have been experimentally measured. The experimental conditions under which heat transfer coefficients were determined reflect a typical working situation for small-scale refrigeration systems. The heat flux ranged from 1.9 to 9.1 kW/m2 and the mass flux was varied from 30 to 140 kg/m2s. The results illustrate that the R22 heat transfer coefficient is always greater than that of R407C. Furthermore, a comparison carried out between the experimental data and those predicted by means of the most credited literature relationships showed a strong overprediction for R407C coefficients.

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Format PDF

Pages : 366-377

Disponible

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    20 €

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    Gratuit

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Détails

  • Titre original : Experimental evaluation of R22 and R407C evaporative heat transfer coefficients in a vapour compression plant.
  • Identifiant de la fiche : 2000-2453
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 23 - n. 5
  • Date d'édition : 08/2000

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