Solar Air Heater with W-Shaped Roughness on Absorber Plate
Prasanna S. Gaikwad1, Samir J. Deshmukh2

1Prasanna S. Gaikwad, Department of Mechanical Engineering, Sant Gadge Baba Amravati University/ PRM Institute of Technology and Research, Badnera, Amravati, Maharashtra, India.
2Samir J. Deshmukh, Department of Mechanical Engineering, Sant Gadge Baba Amravati University/ PRM Institute of Technology and Research, Badnera, Amravati, Maharashtra, India.

Manuscript received on 28 June 2019 | Revised Manuscript received on 05 July 2019 | Manuscript published on 30 July 2019 | PP: 2218-2222 | Volume-8 Issue-9, July 2019 | Retrieval Number: I8141078919/19©BEIESP | DOI: 10.35940/ijitee.I8141.078919

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Abstract: The analysis is made for Reynolds number of 18000 – 21000. The thermal performance is investigated for W – shaped roughness of thickness (t) 5mm, length of 10.5 cm, with an angle of 25°. The simulation is carried out using solar irradiance as heat input at the location of Amravati 20.93°N 77.75°E. Comparison of Reynolds no and Nusselt no is made. The thermal efficiency is found to increase as the temperature goes on increasing simultaneously the pressure at outlet is greater than inlet pressure. The mechanical power which is required is increased due to the roughness present on absorber plate. The heat transfer between smooth and roughened surface is compared. The experimental results are compared with analytical results on ANSYS 18.1. The thermal efficiency for the smooth surface is around 40 – 45% at particular temperature after roughening the absorber plate the efficiency increased upto 50 – 60% for the same temperature.
Keywords: Artificial Roughness, Computational Fluid Dynamics, Laminar and Turbulent Flow, Solar air Heater.

Scope of the Article: Artificial Intelligence