Influence of 45oV-type with collective ring turbulence promoters parameters of thermal performance of flat plate heat collector

Abstract

This study explores the enhancement of thermal performance by disrupting the laminar sublayer through the use of turbulence promoters on the surface of a heated plate. The focus is on investigating how changes in several geometrical parameters of a V-rib combined with a collective ring impact fluid flow and heat transfer properties within a flat plate solar heat collector. Computational methods validated turbulence models, and a range of Reynolds numbers (4000–20000) were employed to conduct a comprehensive CFD analysis, examining flow dynamics and heat transport properties. The study specifically examines the influence of various parameters, including the relative V combined ring ratio (WD/WVR) ranging from 3.0 to 6.0, the Ratio of pitch V and ring to height V and ring (PVR/HVR) from 45.33 to 78, and the relative V and ring height (HVR/Dh) from 0.0238 to 0.0368. High friction factor (f) values were observed at settings of WD/WVR, PVR/HVR, and HVR/Dh at 6.0, 45.33, and 0.0368, respectively. Of significance, the findings indicate that both the thermohydraulic performance (THP) and Nusselt number (Nu) peak when WD/WVR, PVR/HVR, and HVR/Dh are set at 5.0, 63.33, and 0.0325, respectively. This optimal configuration demonstrates the potential to maximize heat transfer and overall system efficiency.

Keywords

• CFD
• Heat transfer
• Ring
• Turbulence promoters