International Scientific Journal

Thermal Science - Online First

online first only

Natural convection heat transfer enhancement of aluminum heat sink using Nano coating by electron beam method

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 nano coating was employed in a heat sink to study the heat transfer performance under natural convection conditions. The nano-coating was achieved using an Electron beam method while the characteristics of nano-coated surfaces were analysed using scanning electron microscopy, 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 Nano coating under natural convection has been experimentally studied at different controllable surrounding temperatures. A uniform increase in the surface roughness by the nano-coating was seen in all cases. The conclusion from several experimental results was that the effect of nano-coating in augmenting the heat transfer is more pronounced only when there is a sufficient temperature driving potential.
PAPER REVISED: 2018-01-19
PAPER ACCEPTED: 2018-01-24
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