Effects of Artificial Roughness on Solar Duct: A Review

As the Solar effects regulate to constant work at a rapid pace, it starts to generate heat. If this heat is not kept in evaluation, the space could excess heat and eventually turbulate itself. Fortunately, a cooling space include a solar duct, which dissipates the heat from the space, preventing it from excess heating with the increase in heat dissipation from space and the reduction in overall form factors, thermal management becomes a more and more important element of solar duct product design. Providing an artificial roughness on a heat transferring surface is an effective passive heat transfer technique to enhance the rate of heat transfer to fluid flow. In this paper, reviews of various artificial roughness elements used as conjugate and convective heat transfer techniques, in order to optimized a performance of thermo hydraulic performance of a solar air heater, is done. The aim of this paper is to survey of literature various studies, in which variable artificial roughness elements are used to enhance the heat transfer rate with little effect of friction. A relation developed by various researchers and research scholars with the help of experimental results and simulation results for heat transfer and friction factor for solar air heater ducts by taking various roughened surfaces profiles are given in table form. These relations are used to analyze the thermo hydraulic performance of solar air heaters having roughened ducts. The objective is to view a detailed review on heat transfer enhancement by using an artificial roughness technique. This paper will be very helpful for the research scholars who are predicting effect of new artificial roughness for solar air heater ducts to enhance the heat transfer rate and comparing with artificial roughness already studied by various researchers.