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Title: A review of thermohydraulic performance of artificially roughened solar air heaters
Authors: Kumar A.
Saini, R. P.
Saini J.S.
Published in: Renewable and Sustainable Energy Reviews
Abstract: Solar air heaters form the major component of solar energy utilization system which absorbs the incoming solar radiation, converting it into thermal energy at the absorbing surface, and transferring the energy to a fluid flowing through the collector. The efficiency of flat plate solar air heater has been found to be low because of low convective heat transfer coefficient between absorber plate and the flowing air which increases the absorber plate temperature, leading to higher heat losses to the environment resulting in low thermal efficiency of such collectors. Artificial roughness in the form of repeated ribs is the most effective and economic way of improving the thermal performance of solar air heater. This paper presents an extensive review on the research carried out on artificial roughened solar air heater ducts. The objective of this paper is to review various studies, carried out on thermal as well as hydraulic performance of artificial roughened solar air heater ducts. The review presented in this paper will be useful for the researchers working in this area. © 2014 Elsevier Ltd.
Citation: Renewable and Sustainable Energy Reviews (2014), 37(): 100-122
Issue Date: 2014
Publisher: Elsevier Ltd
Keywords: Exergetic efficiency
Solar air heater
Thermohydraulic performance
ISSN: 13640321
Author Scopus IDs: 55628573124
Author Affiliations: Kumar, A., Mechanical Engineering Department, Shoolini University, Solan, Himachal Pradesh 174212, India
Saini, R.P., Alternate Hydro Energy Centre, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India
Saini, J.S., Mechanical and
Corresponding Author: Kumar, A.; Mechanical Engineering Department, Shoolini University, Solan, Himachal Pradesh 174212, India; email:
Appears in Collections:Journal Publications [HRE]

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