Abstract— An experimental investigation has been carried out for a range of system an operating parameters in order to analyse effect of artificial roughness on heat transfer in flat plate solar air heater having rhombus shape (sheet metal) as roughness geometry. Duct has an aspect ratio W/H of 7, relative pitch (p/e) range of 40 to 60 and Reynolds Number (Re) range from to 5100 to 28000. A considerable increase in heat transfer has been observed.
Keywords— Solar air heater; Centrifugal Blower; Artificial roughness.
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