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Abstract: Solar air heater is very simple, basic, eco-friendly and economical device for harnessing the solar energy and it has been widely used across the world for many domestic and industrial applications. The lower thermal efficiency of the SAH has directed the focus of the researchers to improve the thermal efficiency of the SAH. There is generation of the laminar viscous sub layer near the absorber plate which reduces the thermal performance of the SAH. Breaking this laminar sub layer and creating the turbulence in the fluid flow field will help to improve the heat transfer. This paper discusses the various methods, designs and roughness geometries used by various researchers to improve the performance of the SAH. Designs, roughness geometries and their impact on the heat transfer, Nusselt number (Nu) and Friction factor (fr) have been summarily discussed.
Keywords:
Keywords: Solar air heater, Roughness Geometries, Reynolds’s number, Nusselt number, Friction factor
Cite Article:
"A Review on the Solar Air Heater Thermal Performance Enhancement Techniques: Artificial Roughness", International Journal of Science & Engineering Development Research (www.ijrti.org), ISSN:2455-2631, Vol.5, Issue 7, page no.1 - 26, July-2020, Available :http://www.ijrti.org/papers/IJRTI2007001.pdf
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000204840
ISSN:
2456-3315 | IMPACT FACTOR: 8.14 Calculated By Google Scholar| ESTD YEAR: 2016
An International Scholarly Open Access Journal, Peer-Reviewed, Refereed Journal Impact Factor 8.14 Calculate by Google Scholar and Semantic Scholar | AI-Powered Research Tool, Multidisciplinary, Monthly, Multilanguage Journal Indexing in All Major Database & Metadata, Citation Generator