Published Paper Details:

Abstract : This study has been undertaken to investigate Solar air heater that absorbs the incoming solar radiations and converts them to thermal energy. It has been observed that the efficiency of the flat plate solar air heater is low because of low convective heat transfer coefficient between the absorber plate the air flowing over it. The most effective way to improve the performance of the solar air heater is to provide artificial roughness elements beneath the absorber plate .So,the investigators studied different artificial roughness of the different geometry and has made analysis using various parameters like Reynolds Number,rib height ,pitch height ,test section containing the geometry.And correspondingly studied the output of these parameters on Nusselt number and the friction factor. With the help of review we found that working numerically on different parameters with the help of CFD analysis that is working On ANSYS Fluent has made our work easier and we get better devices with maximum heat transfer rates using the geometry employed for eg geometry of W-shaped rib,V-shaped rib roughness. Results states that the thermal efficiency obtained in the different works by CFD simulation results were found to be in good agreement as compared with simple duct and with the standard theoretical approaches. It has been found that the Nusselt number increases from 2 to 4times in every cases. Moreover,thermo hydraulic performance parameter (THPP) is also evaluated for different geometry to predict the overall performance and also for selecting the best geometry for the range of parameter investigated.