Thermal Performance of Solar Air Heater by with artificial roughness- A Review

International Journal of Mechanical Engineering

© 2015 by SSRG - IJME Journal

Volume 2 Issue 4

Year of Publication : 2015

Authors : Harish Kumar Patel; Saurabh Singh; Alfa Tigga ; Krishna Kumar Darpan

10.14445/23488360/IJME-V2I4P103

How to Cite?

Harish Kumar Patel; Saurabh Singh; Alfa Tigga ; Krishna Kumar Darpan, "Thermal Performance of Solar Air Heater by with artificial roughness- A Review," SSRG International Journal of Mechanical Engineering, vol. 2,  no. 4, pp. 14-17, 2015. Crossref, https://doi.org/10.14445/23488360/IJME-V2I4P103

Abstract:

The heat is transferred between air and the absorber plate in a solar air heater.  In general, the thermal performance of a solar air heater is low because of poor heat transfer between the absorber plate and air. It can probably be improved by enhancement of heat transfer from the absorber plate by the use of artificial roughness. This technique is gaining importance among the researchers since long time and a lot of research is still going on and has further scope. In this paper research outcomes of various researchers have been discussed. It is found through exploration of various studies on heat transfer enhancement in solar air heater absorber plate that heat transfer can be improved by providing artificial roughness on the absorber plate. Studies on various geometries of artificial roughness and roughness orientations have been investigated by the researchers. The results mainly obtained in the form of variations of Nusselt number and Friction factor with the flow of air in terms of Reynolds number. The review presented in this paper is aimed to provide research scope and findings in use of artificial roughness in solar air heater for better heat transfer.

Keywords:

Artificial roughness, Solar air heater, Roughness geometry, Nusselt number, thermo hydraulic performance, Reynolds number.

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