A Review on CFD Based Analysis of Thermal Performance of Solar Air Heater Having Artificial Roughness
Abstract
Solar air heater has been used for many applications requiring low to medium grade thermal energy like space heating and cooling, agricultural drying etc. Though the energy density is low and the availability is not continuous, it has now become possible to harness this abundantly available energy very reliable for many purposes by using the artificial roughness on absorber plate and hence maximum thermal losses occur to the atmosphere. The use of an artificial roughness on the surface is an effective technique to enhance the rate of heat transfer to fluid flow in the duct of a solar air heater. The objective of this paper is to present a detailed review of literature that deals which the application of CFD in the design of solar air heater transfer, friction factor and flow simulation techniques. Correlation developed for heat transfer and friction factor for different roughness geometries by various investigators in solar air heater are presented.
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