Partager

Document IIF

Echangeur de chaleur à microcanaux en aluminium. 2. Performance de l'évaporateur lorsque le système fonctionne au propane.

A minichannel aluminium tube heat exchanger. 2. Evaporator performance with propane.

Auteurs : FERNANDO P., PALM B., AMEEL P., et al.

Type d'article : Article, Article de la RIF

Résumé

This paper presents heat transfer data for a multiport minichannel heat exchanger vertically mounted as an evaporator in a test-rig simulating a small water-to-water heat pump. The multiport minichannel heat exchanger was designed similar to a shell-and-tube type heat exchanger, with a six-channel tube of 1.42 mm hydraulic diameter, a tube-side heat transfer area of 0.777 m2 and a shell-side heat transfer area of 0.815 m2. Refrigerant propane with a desired vapour quality flowed upward through the tubes and exited with a desired superheat of 1-4 K. A temperature-controlled glycol solution that flowed downward on the shell-side supplied the heat for the evaporation of the propane. The heat transfer rate between the glycol solution and propane was controlled by varying the evaporation temperature and propane mass flow rate while the glycol flow rate was fixed. Tests were conducted for a range of evaporation temperatures from -15 to +10°C, heat flux from 2000 to 9000 W/m2 and mass flux from 13 to 66 kg/m2.s. The heat transfer coefficients were compared with 14 correlations found in the literature. The experimental heat transfer coefficients were higher than those predicted by many of the correlations. A correlation which was previously developed for a very large and long tube (21 mm diameter and 10 m long) was in good agreement with the experimental data (97% of the data within plus or minus 30%). Several other correlations were able to predict the data within a reasonable deviation (within plus or minus 30%) after some adjustments to the correlations. See also this Bulletin, references 2008-1562 and 1563.

Documents disponibles

Format PDF

Pages : 681-695

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 : A minichannel aluminium tube heat exchanger. 2. Evaporator performance with propane.
  • Identifiant de la fiche : 2008-1564
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 31 - n. 4
  • Date d'édition : 06/2008

Liens


Voir d'autres articles du même numéro (18)
Voir la source

Indexation