Call For Paper Volume:4 Issue:10 Oct'2017 |

CFD Analysis of Solar Air Heater with Perforated Baffle on the Absorber Plate

Publication Date : 11/07/2015

Author(s) :

Hrishikesh A. Dhandha , Anjali A. Vyas.

Conference Name :
4th International Conference on Recent Trends in Engineering & Technology(ICRTET-2015) July 2-4,2015 Organized by SNJB's KBJ College of Engineering,Chandwad,Nashik,Maharashtra,India

Abstract :

This paper presents computational fluid dynamics (CFD) analysis to determine fluid flow and heat transfer characteristics of solar air heater.Artificial roughness is used in one side wall of solar air heater absorber plate to break laminar boundary sub layer. It enhances rate of heat transfer from the absorber plate to flow of air stream. A CFD-based investigation of 3-dimensional forced convective fluid flow over solar air heater rectangular duct with one broad wall roughened by half perforated transverse baffles has been performed in ANSYS FLUENT software. The duct has widthto-height ratio of 7.77; the baffle relative roughness pitch ratio is 7.06; the relative baffle height ratio is 0.495.The Reynolds number of the analysis ranges from 3000 to 9000. The effect of roughness geometry [i.e., relative roughness height of baffle (e/h), relative roughness pitch of baffle (p/e), open area ratio (β)] on the heat transfer coefficient and Nusselt number predicted. Solar air heater with artificial roughness experimental model‟s 3-dimensional geometrical modelling made with aid of ANSYS Workbench. The results were predicted by ANSYS FLUENT 14.5 solver. Over the range of study the Heat transfer coefficient and Nusselt number obtained in range of 14.5-29 W/m2K and 35- 80 respectively for variable mass flow rate. Validation of results compared with performed experimental work and found to be in good agreement.

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