Improving the performance of heat exchanger surface by industrial roughness
published by Aِl-Baath University
in 2014
in Mechanical and Electrical Engineering
and research's language is
العربية
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Abstract in English
One popular heat transfer augmentation technique involves the use
of rough surfaces of different configurations. The rough surface
aims to promote surface turbulence that is intended mainly to
increase the heat transfer coefficient and surface area. It was
reported that non-flat surfaces have free convection coefficients
that arrive to 50% to 100% more than those of flat surfaces.
The goal of this study aims mainly to examine heat transfer
enhancement from a surface with same industrial roughness created
by a special tool (roughness surfaces) with different shapes under
convection heat transfer compared to equivalent smooth surfaces
without deformations.
The results show there is no need to apply the different roughness
configurations in two mutually perpendicular directions. It's enough
to cause it only in one plane. And we have got the same win in
surface area.
The results show also the rectangular profiles of roughness give the
best result.
References used
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AL-Essa, A. H., 2006- One Dimensional Finite Element Solution of the Rectangular Fin with Rectangular Perforations. wseas transactions on heat and mass transfer ,Issue 10, Volume 1, p762-768
Bergles, A., Technique to augment heat transfer. In Handbook of heat transfer Applications. ( Edited by Werren M.Rohsenow; James P.Hartnett, and Ejup N.Ganic), Ch.3, second Edition, McGraw – Hill Book company, NY
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