Effect of 450 protruded and dimpled rib height on the performance of triangular duct solar heat collector

Abstract

With the aid of the solar heater collectors, the thermal energy is collected and transformed into heat. The friction and heat transfer features are significantly influenced by the collector's cross-sectional shape. Using a computational technique, the performance of a triangle duct solar heat collector (TDSHC) roughened with 450 protrude and dimpled ribs was investigated in this study. The performance measurements were extended using computational fluid dynamics techniques. The fluid domain has been divided into finite volumes and Re-Normalized group with enhanced wall treatment has been used for model the turbulence. The performance of TDSHC has been measured by varying Reynolds number from 4000 to 20000 and ratio of protruded to dimpled height to print diameter from (ePD/Pd) 0.5 to 1.25 while ratio of protruded to dimpled obstacle pitch (PPD/ePD), ratio of protruded dimpled height to hydraulic diameter (epD/Dh) and Flow attack angle (αPD) of protruded dimpled obstacle have been kept constant at 7.5, 0.032 and 450, respectively. The results of numerical studies have been recorded in the form of Nusselt number (NuPD), friction factor (fPD) and Thermo-hydraulic performance (η). In contrast to various geometric parameter values, it has been discovered (ePD/Pd) = 1 produces the greatest.(η).