CFD Analysis of Thermo Hydraulic Performance of Solar Air Heater Having Roughness of Triangular Cross Section Continuous Ribs on Absorber Plate: A Critical Review

In Present work solar air heaters are studied with their applications computational fluid dynamics, Trails have been conducted on the heat transfer and friction factor for a solar air heater duct with triangular cross-sectional ribs without symmetric gaps. In the CFD investigation, it will assure that the height is 2mm, the pitch (p) of the ribs is 20, the relative roughness pitch (p/e) is 10mm and the angle of attack taken is 60°. This investigation will carry out on a Reynolds Number (Re) ranging within 4000-18000. Results of this analysis will compare with experimental results of Rajesh maithani and j.s. saini for solar air heater with absorber plate having triangular cross section ribs and absorber plate having v-shaped circular cross section ribs with symmetrical gaps at optimum designed value of ribs.