标题：Heat transfer and friction factor characteristics using continuous M shape ribs turbulators at different orientation on absorber plate solar air heater
期刊名称：International Journal of Energy and Environment
印刷版ISSN：2076-2895
电子版ISSN：2076-2909
出版年度：2012
卷号：3
期号：1
页码：33-48
出版社：International Energy and Environment Foundation (IEEF)
摘要：This paper having more concern with enhancement of heat transfer coefficient using artificial roughened absorber plate on solar air heater. The increment in heat transfer also leads to increase in friction factor which leads to increase in pumping power. In this study M shape geometry has been studied which is having different orientation. The effect of roughness parameters relative roughness height (e/D), relative roughness (P/e) and angle of attack (α) on Nusselt number and friction factor have been seen. The range of Reynolds number 3000-22000, e/D, P/e and α are 0.037-0.0776, 12.5-75 and 30-60° respectively.. It has been found out that providing the artificial roughness of M shape increases heat transfer up to 1.7-1.8 times over the smooth duct.
