Abstract
The present experimental work conducts the CFD analysis and numerical investigation for finding the efficiencies of solar air heater with triangular-shaped duct design. The efficiencies are calculated considering the solar intensity and varying ambient conditions at different time of the day. Present work shows triangular-shaped duct solar air heater having black paint-coated absorber plates on two of its surfaces while the third surface is used as glass plate. Also the CFD analysis of the heat transfer phenomena occurring between absorber plate and air is carried out taking the solar radiation intensity available at 13:00 h time in Jaipur. The parameters calculated in this investigation of heat transfer are glazing temperature, absorber surface mean temperature, efficiency, and heat transfer rate. The maximum rise in efficiency is obtained at a mass flow rate of 0.01911 kg/s. The CFD analysis result shows that the efficiency increases with increase in air mass flow rate and experimental investigation results indicate that lesser the velocity of flowing fluid, the more is the efficiency.
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