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http://dx.doi.org/10.3795/KSME-B.2006.30.5.389

A Study on the Local Heat Transfer Characteristics for Circular Tubes Using Heat Transfer Promoter  

Kwon Hwa-Kil (충남대학교 대학원 기계설계공학과)
Yoo Seong-Yeon (충남대학교 기계설계공학과)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.30, no.5, 2006 , pp. 389-396 More about this Journal
Abstract
For the successful design of heat exchangers, it is very important to understand local heat transfer phenomena on the circular tube of heat exchangers. In the present study, experiments are performed for single circular tube and tube banks with and without heat transfer promoters. The naphthalene sublimation technique is employed to measure the local mass transfer coefficients, and the measured local mass transfer data are converted to the local heat transfer data using heat and mass transfer analogy. The distribution pattern of local Nusselt numbers on single circular tube with heat transfer promoters is similar to that without the heat transfer promoter, but average Nusselt numbers are greatly increased. In case of tube banks without the heat transfer promoter, the Nusselt numbers are much lower in the first row than those of other rows, but the local heat transfer coefficients on all rows are equalized when the heat transfer promoter is installed.
Keywords
Heat Transfer Promoter; Circular Tube; Local Heat Transfer Characteristics; Heat Exchanger; Naphthalene Sublimation Technique;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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