Titre :
|
An experimental study on condensation of R134a in a multi-port extruded tube
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Auteurs :
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S. Koyama ;
K. Kuwahara ;
K. Nakashita ;
Proceedings of the 9th international refrigeration conference, Purdue USA, 16-19 july 2002 (2002; USA)
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Type de document :
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article/chapitre/communication
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Année de publication :
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2002
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Format :
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8 p.
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Langues:
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= Anglais
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Catégories :
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SCIENCES FONDAMENTALES ET APPLIQUEES
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Mots-clés:
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TRANSFERT DE CHALEUR
;
CONDENSATION
;
REFRIGERANT
;
PRESSION
;
GOUTTE
;
COEFFICIENT DE TRANSFERT DE CHALEUR
;
VISCOSITE
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Résumé :
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In the present study, the local characteristics of pressure drop and heat transfer are investigated experimentally for the condensation of a pure refrigerant R134a in multi-port extruded tubes of 8 channels in 1.36mm hydraulic diameter and 19 channels in 0.80mm hydraulic diameter. The experimental data of frictional pressure drop (F.P.D.) and condensation heat transfer coefficient (H.T.C.) are compared with previous correlations, most of which are proposed for the condensation of pure refrigerant in a ralatively large diameter tube. Considering the effects of surface tension and kinematic viscosity, new correlation of F.P.D. is developed based on the Mishima-Hibiki correlation. New correlation of H.T.C. is also developed modifying the effect of diameter in the correlation of Haraguchi et al.
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