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Heat Transfer Enhancement in Solar Parabolic Trough Collectors Design Using C-shape, V-shape, and Reverse L-shape Roughness

Abhishek ., C. S. Koli


Solar energy can be collected and used in a large variety of ways including: passive daylighting,
heating liquids and gasses, or generating electricity. Additionally, many energy sources such as wind,
biomass, hydroelectricity, and even fossil fuels originate from the energy provided by the sun.
Parabolic solar concentration systems are state-of-the-art or mature technology. Parabolic-trough
solar concentrating systems are parabolic-shaped collectors made of reflecting materials. The
collectors reflect incident solar radiation onto its focal line toward a receiver that absorbs
concentrated solar energy to raise the temperature of the fluid inside it. The heat transfer from
smooth surface to fluid is smaller since the fluid is mostly laminar. The PTC receptor with glass
covering tube, conduction, convection, and radiation comprises three types of heat transfer. Artificial
rawness is added to improve heat transfer, which disrupts and turbulently disturbs flow and thereby
increases a turbulent flow rate. The fluid, geometry, and roughness of the container surfaces are
highly dependent upon this transfer. The study uses three distinct types of artificial roughness, i.e., C,
V-shape, and reverse L-shape. C-shape, V-shape. The research is performed under constant state
conditions by using computational fluid dynamics in the ANSYS CFX software and the CAD model is
built with a Creo model kit. For analyzing i.e., 005 kg/s, 010 kg/s, and 015 kg/s and Nusselt number vs
mass flow curves are called three different mass flow rate considerations. The results have
demonstrated a significant increase in the rate of heat transfer with artificial roughness. With reverse
L artificial roughness, the maximum heat transfer increase is observed.


Artificial roughness, Solar energy, Parabolic trough collector, Computational fluid dynamics, C-shape, V-shape, Reverse L-shape.

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