 Thermal performance analysis of apex-up discrete arc ribs solar air heater-an experimental studySushant Suresh Bhuvad, Rajnish Azad and Atul Lanjewar Renewable Energy, 2022, vol. 185, issue C, 403-415 Abstract: The most efficient way to enhance the heat transfer performance of the Solar Air Heater (Sol-AHs) duct is by providing an artificial roughened plate. The present study compared the Thermo-hydraulic performance of a novel apex-up discrete arc rib absorber plate Solar Air Heaters (Sol-AHs) with existing best downstream flow ribs geometries. Furthermore, the parameters air flow angle of attack (α) of 30°, 45° and 60° and Reynolds number of 3000–14000 are examined by considering relative gap width (g/e) as 4, rib height to hydraulic diameter (e/Dh) as 0.045, a ratio of rib pitch to rib element diameter as 10, number of gaps as three. The results show that the new apex-up discrete arc rib absorber plates have superior thermal performance than the existing best apex-down ribs geometries. Maximum augmentation in Nu achieves an α of 30° that is 2.92 times the smooth plate. Thermo-hydraulic performance (THPP) is observed to be optimum at Re of 10000 and α of 30°. Correlation for heat transfer and roughness function obtained for varying air flow angle of attack. Keywords: Discrete arc rib; Thermo-hydraulic; Apex-up; Angle of attack; Correlations (search for similar items in EconPapers) Downloads: (external link) Related works: Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:185:y:2022:i:c:p:403-415 DOI: 10.1016/j.renene.2021.12.037 Access Statistics for this article Renewable Energy is currently edited by Soteris A. Kalogirou and Paul Christodoulides More articles in Renewable Energy from Elsevier |
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