Fin Efficiency of Serrated Fins

Fin efficiency of serrated fins was analyzed and an analytical solution of the theoretical fin efficiency was derived in the form of a function of modified Bessel functions. Furthermore, an approximate equation has been given which enables one to calculate the theoretical fin efficiency with a pocke...

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Bibliographic Details
Published in:Heat transfer engineering 2002-03, Vol.23 (2), p.6-14
Main Authors: Hashizume, Kenichi, Morikawa, Ryo, Koyama, Tetsuya, Matsue, Takahiro
Format: Article
Language:English
Subjects:
Applied sciences
Approximation theory
Bessel functions
Devices using thermal energy
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Heat exchangers (included heat transformers, condensers, cooling towers)
Heat transfer
Surfaces
Thermal insulation
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Summary:Fin efficiency of serrated fins was analyzed and an analytical solution of the theoretical fin efficiency was derived in the form of a function of modified Bessel functions. Furthermore, an approximate equation has been given which enables one to calculate the theoretical fin efficiency with a pocket calculator with an accuracy of - 1.5%. In the analysis of the theoretical fin efficiency, however, two assumptions were employed, i.e., uniform heat transfer coefficient over the fin surface and thermal insulation at the end surface of the segmented sections. To compensate for these assumptions, a correction factor was introduced and determined experimentally. Using this correction factor, together with the theoretical fin efficiency, the actual fin efficiency can be estimated for serrated fins of various fin geometries, including plain fins.
ISSN:0145-7632
1521-0537
DOI:10.1080/01457630252800386