Effect of artificial roughness on Thermal and Thermohydraulic efficiency in Rectangular Duct of a Double pass solar Air Heater by using transverse ribs on the absorber plate
Journal Title: International Journal of Modern Engineering Research (IJMER) - Year 2013, Vol 3, Issue 4
Abstract
This paper represents the effect of artificial roughness on the absorber plate in the form of transverse ribs of a double pass solar air heater. An experimental study has been carried out to see the effect of transverse ribs(α=90°)attached on both sides to the absorber plate of a Double pass solar air heater on the Thermal and Thermohydraulic efficiency in a rectangular Duct. The aspect ratio of the Duct (W/H) is 10. The range of Reynolds number varies from 4900 to 12000. The relative roughness pitch (p/e) is between 5-20 and fixed relative roughness height (e/Dh) 0.044 and fixed angle of attack (α) 90°. It has been observed that the maximum thermal and thermohydraulic efficiency of transverse ribs comes at relative roughness pitch (p/e) of 10.
Authors and Affiliations
Sudhanshu Dogra
Keywords
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