Comparative Study for Heat Transfer Enhancement and Friction Characteristic of Solar Air Heater having Artificial Roughness Geometry

Abstract

Various active or passive methods have been introduced to save energy by increasing the heat transfer coefficients on absorber plate in Solar Air Heater. Rib/groove is one of the commonly used passive heat transfer enhancement techniques in solar air heater. Experimental investigation and Comparative study has been carried out to measure the combine effect of wavy-ribs & grooves Turbulators absorber plate in duct of double pass solar air heater. Also, a significant improvement has been observed in Nusselt Number for the experiment at Re 10000 to 20000. From this Experiment conclude that the Nusselt Number and Efficiency has been increased in double pass solar air heater as compared to the smooth (without turbulator) absorber plate in duct. The efficiency of DPSAH increased from 48% to 55%.
DOI: 10.17762/ijritcc2321-8169.150584