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Augmentation du transfert de chaleur grâce à des inserts pendant la condensation du frigorigène R-22 à l'intérieur d'un tube horizontal.

Heat transfer augmentation by inserts during condensation of refrigerant R-22 inside a horizontal tube.

Auteurs : SHRIVASTAVA R., KUMAR R., GUPTA A., et al.

Résumé

In this paper, the enhancement in heat transfer has been studied for the forced-convection condensation of R-22 saturated vapour inside a tube in the presence of twisted tape inserts. The test condenser is constituted by four test sections connected in series. Each test-section has an inside diameter of 12.7 mm and the length of 950 mm. Three twisted tape inserts with the twist ratio of 15, 9 and 6 were put, one by one, in the test condenser. The insert with twist ratio of 6 gave the best performance and enhanced the average heat transfer coefficient by 25% as compared to the plain flow. The segmented tapes of best performing twist ratio of 6 were inserted one at a time in the test condenser. The length of segmented tape inserts was taken as 1/4, 1/2, and 3/4 of the total length of the test condenser. The refrigerant flow rate has been taken as 237 kg/s-m2.

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  • 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 : Heat transfer augmentation by inserts during condensation of refrigerant R-22 inside a horizontal tube.
  • Identifiant de la fiche : 2007-1457
  • Langues : Anglais
  • Source : 2006 Purdue Conferences. 18th International Compressor Engineering Conference at Purdue & 11th International Refrigeration and Air-Conditioning Conference at Purdue [CD-ROM].
  • Date d'édition : 17/07/2006

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