THERMAL SCIENCE

International Scientific Journal

Senthil Kumar Pongiannan

,

Velraj Ramalingam

,

Latha Nagendran

NATURAL-CONVECTION HEAT TRANSFER ENHANCEMENT OF ALUMINUM HEAT SINK USING NANOCOATING BY ELECTRON BEAM METHOD

ABSTRACT
The high power density and compactness of the next generation electronic devices necessitate efficient and effective cooling methods for heat dissipation in order to maintain the temperature at an acceptable safety level. In the present work, aluminum nanocoating was employed in a heat sink to study the heat transfer performance under natural-convection conditions. The nanocoating was achieved using an electron beam method while the characteristics of nanocoated surfaces were analysed using SEM, an energy dispersive X-ray spectroscopy, surface roughness profilometry equipment and by X-ray diffraction techniques. The heat dissipation from heat sink with and without nanocoating under natural-convection has been experimentally studied at different controllable surrounding temperatures. A uniform increase in the surface roughness by the nanocoating was seen in all cases. The conclusion from several experimental results was that the effect of nanocoating in augmenting the heat transfer is more pronounced only when there is a sufficient temperature driving potential.
KEYWORDS
heat sink, Nano-coating, Heat Transfer Enhancement, EDS, surface roughness, natural convection
PAPER SUBMITTED: 2017-08-30
PAPER REVISED: 2018-01-19
PAPER ACCEPTED: 2018-01-24
PUBLISHED ONLINE: 2018-02-18
DOI REFERENCE: https://doi.org/10.2298/TSCI170830007P
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2019, VOLUME 23, ISSUE Issue 5, PAGES [3129 - 3141]
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Natural-convection heat transfer enhancement of aluminum heat sink using nanocoating by electron beam method

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence