The Effects of Winglet Vortex Generator Position in Rectangular-Duct-Type Solar Air Heaters

Abstract

The aim of this work is to numerically investigate the effect of mounting winglet vortex generators on different positions in rectangular-duct-type air heaters. The two investigated positions were the absorber plate and the insulation plate, opposite to the absorber plate. Four shapes of winglet vortex generator, i.e. perforated rectangular winglet vortex generators (P-RWVG), rectangular winglet vortex generators (RWVG), perforated trapezoidal winglet vortex generators (P-TWVG) and trapezoidal winglet vortex generators (TWVG), were used. Results showed that heat-transfer capability would be better if the winglet vortex generators were mounted on the opposite insulation plate in the cases of P-RWVG, RWVG and P-TWVG.

Visualization of Induced Counter-Rotating Vortices for Electric Vehicles Battery Module Thermal Management

“…Previous evaluations on the effect of VG in channel flow reported a significant increase in terms of local heat transfer augmentation (Fiebig et al, 1991;Lei et al, 2017;Lertnuwat, 2022;Rajesh Kanna et al, 2017;Xu et al, 2017). In other engineering applications, VG is used to delay the flow separation hence the aerodynamic drag reduction in turbulence flow (Gao et al, 2020;Kasai et al, 2018;Lo and Kontis, 2016;Patil et al, 2021;Zhao et al, 2017) and improvement in terms of vehicle stability during the cruise (Katz, 2006).…”

Study the Effect of Flow Water/Al2o3 Nanofluid Inside Mini-Channel for Cooling Concentrated Multi-Junction Solar Cell

“…The price to heat one liter of water was $0.387; the payback time was 14 months. Solar water heating was the best option for hotels and resorts for a variety of reasons (Lertnuwat, 2022). The impact of placing winglet vortex generators at various places in rectangular ducttype air heaters was examined numerically.…”