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Condensation Heat Transfer With High Partial Pressure Non Condensable Gas Inside Tube

[+] Author Affiliations
Jun Xia Zhang, Li Wang, Ping Wu

University of Science and Technology, Beijing, China

Hong Ying Li

Nanyang Technological University, Singapore

Paper No. IMECE2009-11126, pp. 1603-1610; 8 pages
doi:10.1115/IMECE2009-11126
From:
  • ASME 2009 International Mechanical Engineering Congress and Exposition
  • Volume 9: Heat Transfer, Fluid Flows, and Thermal Systems, Parts A, B and C
  • Lake Buena Vista, Florida, USA, November 13–19, 2009
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-4382-6 | eISBN: 978-0-7918-3863-1
  • Copyright © 2009 by ASME

abstract

An experimental study on the condensation heat transfer in a non-vacuum separate type heat tube is carried out to comprehend the effect of high partial pressure NC condensable gas on the condensation heat transfer of vapor. The outer wall temperature along the tube length and the condensation heat transfer rate at different operation parameters, including inlet pressure and temperature of vapor, inlet temperature of cooling water and flow rate of cooling water, were measured. The factors influencing the condensation heat transfer coefficient (HTC) and condensation heat transfer rate were analyzed. The results show that the non-vacuum separate type heat pipe can run steadily; the region of the stagnant high partial pressure NC gas in the condenser tube is caused by the pressing of both vapor from the inlet and the condensation liquid at the rear of the tube; vapor flow rate and vapor inlet pressure have prominent influence on the condensation heat transfer rate and condensation HTC, and inlet temperature of cooling water affects the condensation HTC slightly.

Copyright © 2009 by ASME

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