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Influence de la teneur en huile sur l'ébullition d'un frigorigène de remplacement en écoulement classique sur un faisceau de tubes. 2. R134a.

Effects of oil on boiling of replacement refrigerants flowing normal to a tube bundle. 2. R134a.

Auteurs : TATARA R. A., PAYVAR P.

Résumé

Local, experimental heat transfer coefficients have been obtained for boiling refrigerant flowing up and across a tube bundle segment representing a full flooded evaporator tube bundle. This tube has reentrant cavities designed for higher saturation pressure refrigerants. The refrigerant enters at 15% vapour quality and exits at nearly 100% vapour in order to simulate an actual evaporator bundle. Both heat flux and oil content, 0 to 12% (by weight), are varied; the mass flux is not an independent variable but determined by the heat flux. Local tube and bulk fluid temperatures are measured directly, by thermocouples.

Détails

  • Titre original : Effects of oil on boiling of replacement refrigerants flowing normal to a tube bundle. 2. R134a.
  • Identifiant de la fiche : 2001-0689
  • Langues : Anglais
  • Source : ASHRAE Transactions. 2000 Winter Meeting, Dallas, Texas + CD-ROM.
  • Date d'édition : 2000

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