Direct-Contact Heat Transfer for Air Bubbling Through Water

[+] Author and Article Information
H. S. Ghazi

Mechanical Engineering Department, South Dakota State University, Brookings, SD 57007

J. Energy Resour. Technol 113(2), 71-74 (Jun 01, 1991) (4 pages) doi:10.1115/1.2905789 History: Received October 23, 1990; Revised April 11, 1991; Online April 16, 2008


Experiments on direct-contact heat transfer of air injected through an orifice and bubbling through a constant temperature, stagnant, pool of water showed an increase in air temperature ranging from about 100 to 200 percent. The process follows a relationship which describes heat transfer in conventional, closed-type, heat exchangers where one fluid is maintained at a constant temperature. The data is correlated by a relationship for the Nusselt number which is based on an average overall heat transfer coefficient.

Copyright © 1991 by The American Society of Mechanical Engineers
Topics: Heat transfer , Water
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