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Improvement of heat transfer with perforated circular holes in finned tubes of air-cooled heat exchanger
Journal article   Peer reviewed

Improvement of heat transfer with perforated circular holes in finned tubes of air-cooled heat exchanger

Dong H. Lee, Jin M. Jung, Jong H. Ha and Young I. Cho
International communications in heat and mass transfer, v 39(2), pp 161-166
Feb 2012
DOI: https://doi.org/10.1016/j.icheatmasstransfer.2011.11.009
Featured in Collection :   UN Sustainable Development Goals @ Drexel

Abstract

Circular fin Finned tube Heat exchanger Perforation
The present study investigated the effect of perforated circular finned-tube (PCFT) on the convective heat transfer performance of circular finned-tube heat exchangers. The air-side convective heat transfer coefficients increased by 3.55% and 3.31% for 2-hole and 4-hole PCFT cases, respectively. The increase in the convective heat transfer coefficient was related to the reduction of the recirculation region by introducing the perforations at the flow-separation locations on the finned tube. The pressure drop across the finned-tube bundles increased by 0.68% and 2.08% for the 2-hole PCFT and 4-hole PCFT cases, respectively. The greater pressure drop in the case of the 4-hole PCFT might be due to excessive flow disturbances produced by multiple perforations. The fin factor defined as the ratio of the % increase of the convective heat transfer coefficient and that of the pressure drop was 5.19 for the 2-hole PCFT case, whereas that was 1.59 for the 4-hole PCFT case.

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48 citations in Web of Science
54 citations in Scopus

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Collaboration types
Domestic collaboration
International collaboration
Web of Science research areas
Mechanics
Thermodynamics
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