Partager

Document IIF

Evaporation du CO2 dans un tube lisse horizontal.

Evaporation of CO2 in a horizontal smooth tube.

Auteurs : PARK C. Y., HRNJAK P. S.

Résumé

Flow boiling heat transfer coefficients of CO2 were measured in a horizontal smooth tube with inner diameter 6.1 mm. The characteristics of CO2 flow boiling is explained by CO2 properties and flow patterns. The measured CO2 heat transfer coefficients were compared with other published data. Experiments with R22 were also conducted in the same system and the results show that the heat transfer coefficients for CO2 are 40 to 150% higher than for R22. The CO2 heat transfer coefficients presented indicate the reduction in the heat transfer coefficient as mass flux increases at low-quality regions and also show that dryout does not occur until the high-quality region of 0.8, for mass fluxes of 200 and 400 kg/m2.s. The Gungor and Winterton correlation gives relatively good agreement with measured data; however it deviates more at lower evaporation temperature and high mass flux conditions.

Documents disponibles

Format PDF

Pages : 2005-3

Disponible

  • Prix public

    20 €

  • Prix membre*

    Gratuit

* meilleur tarif applicable selon le type d'adhésion (voir le détail des avantages des adhésions individuelles et collectives)

Détails

  • Titre original : Evaporation of CO2 in a horizontal smooth tube.
  • Identifiant de la fiche : 2006-0582
  • Langues : Anglais
  • Source : Commercial Refrigeration. Thermophysical Properties and Transfer Processes of Refrigerants. Proceedings of the IIR International Conferences.
  • Date d'édition : 02/08/2005

Liens


Voir d'autres communications du même compte rendu (140)
Voir le compte rendu de la conférence

Indexation