期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2016
卷号：5
期号：11
页码：20017
DOI：10.15680/IJIRSET.2016.0511067
出版社：S&S Publications
摘要：Artificial roughness is in the form of triangular protrusions on the absorber plate is an effective techniqueto enhance the rate of heat transfer to flowing fluid in the roughened duct of solar air heater. It is well known, that theheat transfer coefficient of a solar air heater duct can be increased by providing artificial roughness on the heated wallexperiments are performed to collect heat transfer and friction data for forced convection flow of air in solar air heaterrectangular duct. The Reynolds number of the air flow ranges from 10000 to 12000. The Nusselt number obtained is inthe range of 50 to 110. The maximum Nusselt number is 42% higher than that of the smooth plate while the averagevalue of the Nusselt number is 60% higher than that of the smooth plate. The apparatus is simulated in a virtual CFDenvironment to determine the temperature and velocity field to examine their distribution along the surface of the plateas well as the cross section of the duct
关键词：solar air heater; Nusselt number; Reynolds mumber; CFD
