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Enhanced natural convection heat transfer of a chimney-based radial heat sink

Author(s)
Li, BinBaik, Young-JinByon, Chan
Issued Date
2016-01
DOI
10.1016/j.enconman.2015.11.037
URI
https://scholarworks.unist.ac.kr/handle/201301/21460
Fulltext
http://www.sciencedirect.com/science/article/pii/S0196890415010572?via%3Dihub
Citation
ENERGY CONVERSION AND MANAGEMENT, v.108, pp.422 - 428
Abstract
In this study, the natural convection heat transfer from chimney-based radial heat sinks was investigated numerically and experimentally. The thermal performance of a radial heat sink with chimney was estimated and compared with that of a radial heat sink without a chimney. The effects on the heat sinks' thermal performance were investigated in regard to the orientation angle with respect to gravity (0 degrees <= theta <= 180 degrees), the fin number (15 <= N <= 30), and the distance between the base plate and chimney (5 mm <= H-c <= 25 mm). The results show that there exist optimal values for and N. The orientation angles 0 degrees and 45 degrees result in slightly better thermal performance than 135 degrees and 180 degrees, while 90 degrees results in the worst thermal performance. The chimney-based heat sink with optimal structure enhances the thermal performance by up to 20% compared with the radial heat sink without a chimney.
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
ISSN
0196-8904
Keyword (Author)
Chimney effectRadial heat sinkNatural convection
Keyword
CONCENTRIC RINGPERFORMANCECYLINDERSUBJECTFLOWJET

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