A New Model for Forced-Convection Condensation on Integral-Fin Tubes-Reference-Cited by-同舟云学术

A New Model for Forced-Convection Condensation on Integral-Fin Tubes

Published:1996-08-01 Issue:3 Volume:118 Page:689-693
ISSN:0022-1481
Container-title:Journal of Heat Transfer
language:en
Short-container-title:

Author:

Cavallini A.¹,Doretti L.¹,Longo G. A.¹,Rossetto L.¹

Affiliation:

1. Istituto di Fisica Tecnica, Universita` di Padova, Padova, Italy

Abstract

This work investigates the effects of vapor shear during pure vapor external condensation on horizontal integral-fin tubes. More than 220 experimental data points in a wide range of operative conditions and enhanced surface geometries are reported together with the visual observation of the condensate flow patterns. The effects of vapor shear are relevant only for vapor Reynolds numbers greater than 70,000–100,000, while heat transfer enhancement is linked to the geometry of the extended surface. A simple semi-empirical equation was developed to account for the shear stress contribution in forced-convection condensation: this equation, applied in conjunction with the model by Briggs and Rose (1994) for stationary vapor condensation, displays a good ability in reproducing all the available data with relevant vapor velocities.

Publisher

ASME International

Subject

Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science

Link

http://asmedigitalcollection.asme.org/heattransfer/article-pdf/118/3/689/5911126/689_1.pdf

Reference24 articles.

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2. Adamek, T., and Webb, R., 1996, Private Communication.

3. Beatty K. O. , and KatzD. L., 1948, “Condensation of Vapor on Outside of Finned Tubes,” Chem. Eng. Progr., Vol. 44, pp. 55–70.

4. Bella, B., Cavallini, A., Longo, G. A., and Rossetto, L, 1992, “Pure Refrigerant Condensation on a Single integral Finned Tube: Vapour Velocity Effects,” Proc. 1992 Int. Refr. Conf., Purdue University, pp. 177–186.

5. Bella B. , CavalliniA., LongoG. A., and RossettoL., 1993, “Pure Vapour Condensation of Refrigerants 11 and 113 on a Horizontal Integral Finned Tube at High Vapour Velocity,” J. of Enhanced Heat Transfer, Vol. 1, pp. 77–86.

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