CFD analysis of ribs effects on heat transfer in a solar parabolic tough collector

حاجی علی گل, نجمه; جمالی, مصطفی

doi:10.22052/eem.2024.254462.1055

CFD analysis of ribs effects on heat transfer in a solar parabolic tough collector

نوع مقاله : مقاله پژوهشی

نویسندگان

¹ گروه آموزشی مهندسی مکانیک- دانشگاه صنعتی همدان

² گروه مهندسی مکانیک دانشگاه صنعتی همدان

10.22052/eem.2024.254462.1055

چکیده

The production of electricity by solar thermal power plants is one of the promising ways to utilize renewable energy sources and reduce greenhouse gas emissions. Solar thermal power plants use concentrated solar radiation to heat a fluid that drives a turbine or an engine. One of the common technologies for concentrating solar radiation is the linear parabolic trough collector, which consists of a parabolic-shaped reflector that focuses the sunlight onto a receiver tube located at the focal line. In this research, the turbulent fluid flow and heat transfer in tubes with solid and porous fins as well as without fins were investigated numerically using a three-dimensional computational fluid dynamics (CFD) model. The objective was to study the impact of the fin type on the heat transfer and flow structure at different Reynolds numbers, which represent the ratio of the inertial forces to the viscous forces in the fluid. The findings showed that using the porous fin, the friction coefficient decreased and overall Nusselt number increased compared to the solid fin and the plain tube. The porous fin enhanced the heat transfer by creating more mixing and vortices in the fluid, while reducing the pressure drop by allowing some fluid to pass through the fin. The results of this research can provide useful insights for the design and optimization of internally finned tubes for solar thermal power plants.

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