Please use this identifier to cite or link to this item: https://idr.l2.nitk.ac.in/jspui/handle/123456789/15412
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dc.contributor.authorNidhul K.
dc.contributor.authorKumar S.
dc.contributor.authorYadav A.K.
dc.contributor.authorAnish S.
dc.date.accessioned2021-05-05T10:27:02Z-
dc.date.available2021-05-05T10:27:02Z-
dc.date.issued2020
dc.identifier.citationEnergy Vol. 200 , , p. -en_US
dc.identifier.urihttps://doi.org/10.1016/j.energy.2020.117448
dc.identifier.urihttp://idr.nitk.ac.in/jspui/handle/123456789/15412-
dc.description.abstractComputational fluid dynamics (CFD) and exergy analysis are conducted to investigate the impact of secondary flow produced by V-ribs on the overall performance of a triangular solar air heater (SAH) duct. For a fixed relative rib pitch (Rp = 10) and relative rib height (Rh = 0.05), the effect of rib inclination (α) is studied using CFD technique for varying Reynolds number (5000 ≤ Re ≤ 20000). Based on the CFD simulation results, empirical correlations capable of predicting Nu and f with an absolute variance of 8.7%, and 4.7%, respectively, are developed. Employing these correlations, exergetic performance analysis is carried out. Maximum effectiveness parameter (ε) of 2.01 is obtained for α = 45° at Re = 7500. The exergy analysis reveals that the entropy generated is lower for the ribbed triangular duct compared to the smooth duct with maximum enhancement in exergetic efficiency (ηex) as 23% for α = 45°. The study is extended for the rectangular duct to compare the performance with the ribbed triangular duct SAH (α = 45°). Results show that ribbed triangular duct SAH (α = 45°) is superior over various configurations of the ribbed rectangular duct SAH at higher mass flow rates. © 2020 Elsevier Ltden_US
dc.titleEnhanced thermo-hydraulic performance in a V-ribbed triangular duct solar air heater: CFD and exergy analysisen_US
dc.typeArticleen_US
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