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Observations des caractéristiques d'écoulement diphasique du R125 et du R407C à l'intérieur d'un tube d'un diamètre de 3 mm.

Some observations of the two-phase flow characteristics of R125 and R407C within a 3-mm diameter tube.

Auteurs : YANG K. S., CHEN I. Y., HU R., et al.

Résumé

Two-phase flow pattern and the frictional characteristics of refrigerants R407C and R125 inside a 3-mm-diameter tube are reported. Tests were performed with a mass flux in the range of about 300-1000 kg/m2.s. It is found that the development of flow pattern for R125 is at a lower vapour velocity than that of R407C, due to its larger vapour density. A modified flow-regime map applicable for a 3-mm-diameter tube is developed. Test results of the frictional pressure gradient are compared with several empirical correlations.

Détails

  • Titre original : Some observations of the two-phase flow characteristics of R125 and R407C within a 3-mm diameter tube.
  • Identifiant de la fiche : 2004-0129
  • Langues : Anglais
  • Source : ASHRAE Transactions. 2002 annual Meeting, Honolulu, Hawaii. Volume 108, part 2 + CD-ROM.
  • Date d'édition : 2002

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