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CFD Analysis on the Thermal Hydraulic Performance of an SAH Duct with Multi V-Shape Roughened Ribs

School of Mechanical Engineering, Kyungpook National University, Daegu 41566, Korea
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Academic Editor: Francesco Calise
Energies 2016, 9(6), 415; https://doi.org/10.3390/en9060415
Received: 31 March 2016 / Revised: 11 May 2016 / Accepted: 19 May 2016 / Published: 28 May 2016
(This article belongs to the Special Issue Solar Cooling and Heating)
This study presents the heat transfer and fluid flow characteristics in a rib-roughened SAH (solar air heater) channel. The artificial roughness of the rectangular channel was in the form of a thin circular wire in discrete multi V-pattern rib geometries. The effect of this geometry on heat transfer, fluid flow, and performance augmentation was investigated using the CFD (computational fluid dynamics). The roughness parameters were a relative discrete distance of 0.69, a relative rib height of 0.043, a relative rib pitch of 10, a relative rib width of 6.0, and a flow-attack-angle of 60°. The discrete width ratios and Reynolds numbers ranged from 0.5 to 2.0 and from 2000 to 20,000, respectively. The CFD results using the renormalization k-epsilon model were in good agreement with the empirical relationship. This model was used to investigate the heat transfer and fluid flow characteristics in the multi V-pattern rib roughened SAH channel. The thermo-hydraulic performance was found to be the best for the discrete width ratio of 1.0. A discrete multi V-pattern rib combined with dimple staggered ribs also had better overall thermal performance compared to other rib shapes. View Full-Text
Keywords: thermal hydraulic performance; heat transfer enhancement; SAH; solar energy thermal hydraulic performance; heat transfer enhancement; SAH; solar energy
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MDPI and ACS Style

Kumar, A.; Kim, M.-H. CFD Analysis on the Thermal Hydraulic Performance of an SAH Duct with Multi V-Shape Roughened Ribs. Energies 2016, 9, 415. https://doi.org/10.3390/en9060415

AMA Style

Kumar A, Kim M-H. CFD Analysis on the Thermal Hydraulic Performance of an SAH Duct with Multi V-Shape Roughened Ribs. Energies. 2016; 9(6):415. https://doi.org/10.3390/en9060415

Chicago/Turabian Style

Kumar, Anil; Kim, Man-Hoe. 2016. "CFD Analysis on the Thermal Hydraulic Performance of an SAH Duct with Multi V-Shape Roughened Ribs" Energies 9, no. 6: 415. https://doi.org/10.3390/en9060415

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