Partager

Séparation du liquide et de la vapeur dans le collecteur d’un échangeur thermique à micro-canaux.

Separation of liquid and vapor in header of MCHE.

Numéro : pap. 2248

Auteurs : LI J., HRNJAK P.

Résumé

This paper presents the experimental study of separation of two-phase flow in a vertical header of microchannel heat exchanger (MCHE) based on quantified visualization using fast camera, modelling analysis and experimental evaluation. A condenser model is developed to explore separation effects on heat exchanger. The modeling results show the benefits that a separation condenser has over a conventional condenser is affected by the separation results in the header. A header prototype is made that has an inlet in the longitudinal center part. Two sub-passes downstream are incorporated, lower for liquid and upper vapor flow. The header for experiment is clear to provide visual access. R-134a is used as the fluid of interest and mass flux through the inlet microchannels is controlled between 55 kg/(m2s)-195 kg/(m2s). The experiment results indicate that ideal separation in that header can happen at low mass flux up to 70 kg/(m2s). Results are presented in function of liquid and vapor separation efficiencies (?l, ?v). Two phase flow inside the header is analyzed to study the mechanisms for liquid-vapor separation.

Documents disponibles

Format PDF

Pages : 10 p.

Disponible

  • Prix public

    20 €

  • Prix membre*

    15 €

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

Détails

  • Titre original : Separation of liquid and vapor in header of MCHE.
  • Identifiant de la fiche : 30018792
  • Langues : Anglais
  • Source : 2016 Purdue Conferences. 16th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Date d'édition : 11/07/2016

Liens


Voir d'autres communications du même compte rendu (274)
Voir le compte rendu de la conférence

Indexation