Thermal Hydraulic Performance in a Solar Air Heater Channel with Multi V-Type Perforated Baffles

Anil Kumar and Man-Hoe Kim
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Anil Kumar: School of Mechanical Engineering, Kyungpook National University, Daegu 41566, Korea
Man-Hoe Kim: School of Mechanical Engineering, Kyungpook National University, Daegu 41566, Korea

Energies, 2016, vol. 9, issue 7, 1-18

Abstract: This article presents heat transfer and fluid flow characteristics in a solar air heater (SAH) channel with multi V-type perforated baffles. The flow passage has an aspect ratio of 10. The relative baffle height, relative pitch, relative baffle hole position, flow attack angle, and baffle open area ratio are 0.6, 8.0, 0.42, 60°, and 12%, respectively. The Reynolds numbers considered in the study was in the range of 3000–10,000. The re-normalization group (RNG) k -? turbulence model has been used for numerical analysis, and the optimum relative baffle width has been investigated considering relative baffle widths of 1.0–7.0.The numerical results are in good agreement with the experimental data for the range considered in the study. Multi V-type perforated baffles are shown to have better thermal performance as compared to other baffle shapes in a rectangular passage. The overall thermal hydraulic performance shows the maximum value at the relative baffle width of 5.0.

Keywords: solar energy; heat transfer enhancement; friction factor; solar air heater (SAH) channel; perforated baffle (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2016
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Citations: View citations in EconPapers (3)

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