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Numerical Investigation of Heat Transfer and Friction Characterstics of Solar Air Heater Duct using Broken Double Arc Shaped Ribs Roughness


Lakshya Tamrakar , Scope college of engineering, Bhopal; Dr. S.K. Nagpure, Scope college of engineering, Bhopal


Solar air heater, Nusselt number, Heat transfer, Relative gap width


Solar air heating is a developing renewable energy technology used for various applications, presently solar air heaters have numerous applications in space heating, cooling and ventilation. These solar air heaters have low heat transfer efficiency which can be improved using geometrical modifications like optimizing duct geometry or adding artificial roughness. The use of artificial roughness on the underside of the absorber plate is an effective and economic way to improve the thermal performance of a solar air heater. Several experimental investigations, involving different types of roughness elements, have been carried out to improve the heat transfer from the absorber plate to air flowing in solar air heaters. In this paper the CFD analysis on heat transfer and friction in rectangular ducts roughened with broken double arc-rib has been presented. The relative gap width (g/e) is varied from 0.5 to 2.5 and other parameter are constant. The effects of gap width (g/e) on Nusselt number, friction factor and thermo-hydraulic performance parameter have been discussed and results compared with smooth duct under similar conditions. It is found that the maximum heat transfer and friction characteristic at a gap width of 1.0.

Other Details

Paper ID: IJSRDV7I110237
Published in: Volume : 7, Issue : 11
Publication Date: 01/02/2020
Page(s): 197-200

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