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Title: A review on roughness geometry used in solar air heaters
Authors: Varun
Saini, R. P.
Singal, Sunil Kumar
Published in: Solar Energy
Abstract: The use of an artificial roughness on a surface is an effective technique to enhance the rate of heat transfer to fluid flow in the duct of a solar air heater. Number of geometries of roughness elements has been investigated on the heat transfer and friction characteristics of solar air heater ducts. In this paper an attempt has been made to review on element geometries used as artificial roughness in solar air heaters in order to improve the heat transfer capability of solar air heater ducts. The correlations developed for heat transfer and friction factor in roughened ducts of solar air heaters by various investigators have been reviewed and presented. © 2007 Elsevier Ltd. All rights reserved.
Citation: Solar Energy (2007), 81(11): 1340-1350
Issue Date: 2007
Keywords: Artificial roughness
Effective efficiency
Friction factor
Heat transfer
Solar air heater
ISSN: 0038092X
Author Scopus IDs: 56013175100
Author Affiliations: Varun, Department of Mechanical Engineering, Moradabad Institute of Technology, Ram Ganga Vihar, Moradabad, 244001, India
Saini, R.P., Alternate Hydro Energy Centre, Indian Institute of Technology, Roorkee, 247667, India
Singal, S.K., Alternate Hydro
Corresponding Author: Singal, S.K.; Alternate Hydro Energy Centre, Indian Institute of Technology, Roorkee, 247667, India; email:
Appears in Collections:Journal Publications [HRE]

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