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Echangeur de chaleur à microcanaux en aluminium. 3. Performance du condenseur lorsque le système fonctionne au propane.

A minichannel aluminium tube heat exchanger. 3. Condenser performance with propane.

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

Type d'article : Article, Article de la RIF

Résumé

This paper reports heat transfer results obtained during condensation of refrigerant propane inside a minichannel aluminium heat exchanger vertically mounted in an experimental setup simulating a water-to-water heat pump. The condenser was constructed of multiport minichannel aluminium tubes assembled as a shell-and-tube heat exchanger. Propane vapour entered the condenser tubes via the top end and exited sub-cooled from the bottom. Coolant water flowed upward on the shell-side. The heat transfer areas of the tube-side and the shell-side of the condenser were 0.941 and 0.985 m2, respectively. The heat transfer rate between the two fluids was controlled by varying the evaporation temperature while the condensation temperature was fixed. The applied heat transfer rate was within 3900-9500 W for all tests. Experiments were performed at constant condensing temperatures of 30, 40 and 50°C, respectively. The cooling water flow rate was maintained at 11.90 l/min for all tests. De-superheating length, two-phase length, sub-cooling length, local heat transfer coefficients and average heat transfer coefficients of the condenser were calculated. The experimental heat transfer coefficients were compared with predictions from correlations found in the literature. The experimental heat transfer coefficients in the different regions were higher than those predicted by the available correlations. See also this Bulletin, references 2008-1562 and 1564.

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Pages : 696-708

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Détails

  • Titre original : A minichannel aluminium tube heat exchanger. 3. Condenser performance with propane.
  • Identifiant de la fiche : 2008-1563
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 31 - n. 4
  • Date d'édition : 06/2008

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