A Review on Solar Duct with Roughened Absorber Plate

A Review on Solar Duct with Roughened Absorber    Plate

Rahul Kumar1, Dr. Shyam Kumar Birla2

1, 2 Department of Mechanical Engineering, Oreintal College of Technology, Bhopal, India

Abstract
In order to enhance rate of heat transfer to flowing air inside the duct of a solar air heater, artificially roughened surface of absorber plate is taken into consideration to be an powerful approach. Investigators reported various roughness geometries in literature for studying warmth transfer and friction traits of an artificially roughened duct of solar air heaters. Out of various types of solar collectors, the flat-plate collectors are most economical and popular, since they are fixed permanently in position, involve simple construction and require little maintenance. Flat plate solar collectors used in modern domestic hot water systems have not changed significantly in the past few years. These types of absorbers typically have high heat losses through convective and radiative heat transfer. This paper has a review on number of design investigated which explores the recent advancements and efforts made in improving the performance of the flat plate collector.

Keywords — Computational Fluid Dynamics, V shaped, U shaped Transverse shaped wavy grooves, artificial roughness, Nusselt No., Friction factor