Abstract
Thermal hydraulic performance analysis of rectangular duct having single step rib using CFD as a tool
Highlights
In the recent years, the world is facing energy crisis
Nu number increment in single step rib is much higher than smooth plate rectangular duct
In consequence of a 3-D CFD study of fluid flow and heat transfer characteristics of a rectangular duct roughened with single step rib, the following conclusions can be drawn:
Summary
The world is facing energy crisis. Due to increase in the population, shortage of oil and coal, higher fuel prices and global economic recession, the demand of energy is on a continuous rise. The per capita consumption of energy is increasing This is putting pressure on the conventional sources of energy generation like coal and petroleum which account for around 70% of total energy production. The global institutions like UNFCCC (United Nations Framework Convention on Climate Change) and UNEP (United Nations Environment Program) are continuously urging the nations to switchover towards renewable sources of energy. Solar air heater is less costly, easy to fabricate simple in design, requires very less maintenance and is ecofriendly. As a result, it finds applications in drying of agricultural commodities, seasoning of timber, heating of commercial and domestic buildings, etc. Its fundamental weakness is low rate of heat transfer between the air and the absorber plate
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