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Transfert de chaleur lors de la condensation et caractéristiques des chutes de pression de R-290 (propane), de R-600 (butane), ainsi que d'un mélange de R-290 et de R-600 dans le serpentin.

Condensation heat transfer and pressure drop characteristics of R-290 (propane), R-600 (butane), and a mixture of R-290/R-600 in the serpentine small-tube bank.

Auteurs : WEN M. Y., HO C. Y., HSIEH J. M.

Type d'article : Article

Résumé

This paper reports an experimental investigation of heat transfer and pressure drop behavior during condensation of R-600, R-600/R-290 (50/50 wt.%) and R-290 in the three-line serpentine small-diameter (2.46 mm) tube bank. Heat transfer coefficientsand pressure drop characteristics are measured at a constant heat flux of 5.2 kW/m2, mass flux (205-510 kg/m2.s) and refrigerantquality (0.15-0.84). The heat transfer coefficients for R-600, R-290/R-600 and R-290 are about 155, 124 and 89% larger as compared with that for R-134a at the same conditions. The condensation flow frictional pressure drop for R-600, R-600/R-290 and R-290 in the present refrigerant mass fluxes are about 69, 58 and 36% larger as compared with that for R-134a. In addition, the Dobson and Chato correlation provided the best prediction of the average heat transfer coefficients for the present refrigerants with experimental data with an average standard deviation of 12.8%. The pressure drop result shows a satisfactory agreement between the Friedel correlation and the experimental data, with a mean deviation of 15.3%. [Reprinted with permission from Elsevier. Copyright, 2006].

Détails

  • Titre original : Condensation heat transfer and pressure drop characteristics of R-290 (propane), R-600 (butane), and a mixture of R-290/R-600 in the serpentine small-tube bank.
  • Identifiant de la fiche : 2007-0525
  • Langues : Anglais
  • Source : Applied Thermal Engineering - vol. 26 - n. 16
  • Date d'édition : 11/2006

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