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Condensation Heat Transfer of R22 and R410A in Horizontal Smooth and Microfin Tubes

[+] Author Affiliations
Man-Hoe Kim, Byung-Han Lim

Samsung Electronics Company, Suwon, Korea

Jeong-Seob Shin

Pohang University of Science and Technology, Kyungbuk, Korea

Paper No. IMECE2002-33350, pp. 469-475; 7 pages
  • ASME 2002 International Mechanical Engineering Congress and Exposition
  • Advanced Energy Systems
  • New Orleans, Louisiana, USA, November 17–22, 2002
  • Conference Sponsors: Advanced Energy Systems Division
  • ISBN: 0-7918-3626-6 | eISBN: 0-7918-1691-5, 0-7918-1692-3, 0-7918-1693-1
  • Copyright © 2002 by ASME


An experimental investigation of condensation heat transfer in 9.52 mm horizontal copper tubes was conducted using R22 and R410A. The test rig had a straight, horizontal test section with an active length of 0.92 m and was cooled by the heat transfer fluid (cold water) circulated in a surrounding annulus. Constant heat flux of 11.0 kW/m2 was maintained throughout the experiment and refrigerant quality varied from 0.9 to 0.1. The condensation test results at 45°C were reported for 40–80 kg/h mass flow rote. The local and average condensation coefficients for seven microfin tubes were presented compared to those for a smooth tube. The average condensation coefficients of R22 and R410A for the microfin tubes were 1.7–3.19 and 1.7–2.94 times larger than those in smooth tube, respectively.

Copyright © 2002 by ASME



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