Journal Press India^®

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Heat transfer coefficient between absorber surface of collector and fluid i.e. air can be improved by providing artificial roughness on the absorber surface. In this way the Thermal efficiency is increased. Due to roughness geometry pumping power of solar collector is increased due to friction losses in the duct. So, it is necessary to take into account size, shape and flow pattern of various roughness elements to increase maximum efficiency with minimum frictional losses. Various artificial roughness geometries have been reported in the literature by investigators, for determining the effect of various roughness geometries on heat transfer enhancement and friction characteristics in roughened duct of solar air heater. Reviews of various studies are presented in this study.

Keywords

Solar Air Heater Solar Air Heater; Artificial Roughness, Roughness Geometry; Nusselt Number; Reynolds Number; Friction Factor; Artificial Roughness; Roughness Geometry; Nusselt Number; Reynolds Number; Friction Factor

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