Abstract
The lower heat transfer coefficient between absorber plate and flowing air in the duct leads to a decrease in thermal performance of solar air heater. To improve the performance of the air heater, turbulence is created on the underside of the absorber plate by providing artificial roughness in the heat transfer zone. In this paper, the performance of the solar air heater is presented with five different types of artificial roughness such as rectangular rib, triangular rib, dimpled, chamfered rib, and inclined rib using ANSYS Fluent software. The result shows that among selected different roughness triangular rib roughness provided maximum heat transfer. Maximum pressure drop is obtained for inclined rib roughness. The thermo-hydraulic performance for rectangular, triangular, dimpled, chamfered, and inclined ribs roughness is between 0.87–0.86, 1.02–1.24, 0.99–0.96, and 0.96–0.84, respectively.
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Chopade, V., Patil, S.D. (2020). Numerical Analysis of Heat Transfer Enhancement in Artificially Roughened Solar Air Heater. In: Singh, S., Ramadesigan, V. (eds) Advances in Energy Research, Vol. 2. Springer Proceedings in Energy. Springer, Singapore. https://doi.org/10.1007/978-981-15-2662-6_28
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DOI: https://doi.org/10.1007/978-981-15-2662-6_28
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