Journal of Enhanced Heat Transfer Theory and Application in High Performance Heat and Mass Transfer

ISSN for PRINT: 1065-5131

For Online Access

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2003, Volume10

Issue 3

102 pages

DOI: 10.1615/JEnhHeatTransf.v10.i3

Issue price - $138.00

E. Begg
Department of Mechanical Engineering, University of Connecticut, 191 Auditorium Rd., Unit 3139, Storrs CT 06269-3139, USA

B. Holley
Department of Mechanical Engineering, University of Connecticut, 191 Auditorium Rd., Unit 3139, Storrs CT 06269-3139, USA

Dr. Amir Faghri
College of Engineering, Department of Mechanical Engineering, University of Connecticut, 191 Auditorium Rd., Unit 3139, Storrs CT 06269-3139, USA

Both a flow visualization experiment and measurements of heat transfer and pressure drop were conducted for water undergoing complete condensation in a family of horizontal tubes with diameters from 1.7 to 4 mm. The flow visualization experiment reveals a skewed annular liquid film over nearly the entire condensation length. Average heat transfer coefficients were calculated for tubes of 1.7, 2.5, 3.2, and 4.0 mm diameter, over a range of mass fluxes from 10 to 25 kg/m²s, at saturation temperatures of 60, 70, 80, and 90 °C. At a fixed mass flux, results for complete condensation show the average heat transfer coefficient decreases and pressure drop increases with increasing condensation length. For the same mass flux and at comparable condensation lengths, the average heat transfer coefficient and pressure drop increase with decreasing tube diameter. The effects of saturation temperature and mass flux are shown for each of the four tube diameters tested.

DOI: 10.1615/JEnhHeatTransf.v10.i3.80 Download article, 335-354 pages

Article price - $35.00

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