Abstract
An experimental investigation has been carried out to see the effect of roughness element on heat transfer and friction factor on the absorber plate of the solar air heater. The roughness provided is in the form of protrusions which are arranged in an arc pattern. This paper presents an investigation to study the effect of protruded geometry on heat transfer coefficient and friction factor in an artificially roughened solar air heater duct. The protrusions forming an arc having an arc angle (α) of 60° which is mounted on the test section of duct to create turbulent flow through the test section. Measurements are carried out for rectangular duct of having aspect ratio (W/H) of 11 and Reynolds number (Re) ranges from 3,500 to 18,000. The results obtained for various relative roughness pitch (P/e) has been compared with smooth one.
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Schedule a callMore From: Journal of The Institution of Engineers (India): Series C
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