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Etude expérimentale sur le transfert de chaleur lors de la condensation et sur la chute de pression des nouveaux frigorigènes HFC (R134a, R125, R32, R410A, R236ea) dans un tube lisse horizontal.

Experimental investigation on condensation heat transfer and pressure drop of new HFC refrigerants (R134a, R125, R32, R410A, R236ea) in a horizontal smooth tube.

Auteurs : CAVALLINI A., CENSI G., DEL COL D., et al.

Type d'article : Article, Article de la RIF

Résumé

The paper reports experimental heat transfer coefficients and pressure drops measured during condensation inside a smooth tube when operating with pure HFC refrigerants (R134a, R125, R236ea, R32) and the nearly azeotropic HFC refrigerant blend R410A. Data taken when condensing HCFC-22 are also reported for reference. The effects of vapour quality, mass velocity, saturation temperature and temperature difference between saturation and tube wall on the heat transfer coefficient are investigated by analysing the experimental data. A predictive study of the condensation flow patterns occurring the tests is also presented. Finally comparisons with predictions from the model by Kosky and Staub are reported for all the data sets.

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Format PDF

Pages : 73-87

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    20 €

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    Gratuit

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Détails

  • Titre original : Experimental investigation on condensation heat transfer and pressure drop of new HFC refrigerants (R134a, R125, R32, R410A, R236ea) in a horizontal smooth tube.
  • Identifiant de la fiche : 2001-1731
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 24 - n. 1
  • Date d'édition : 01/2001

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