Numerical Simulation and Experimental Study for Solar Air Collector with Hemispherical Protrusions on the Absorption Plate

In order to increase the efficiency of solar air collectors, a type of solar air collector with hemispherical protrusions is proposed in this paper, and its performance is analyzed from two aspects of numerical simulation and experimental study. And the mathematical model of the collector is established and simulated with MATLAB program. By comparing the experimental data with the simulation results, the simulation can accurately predict the performance of the solar air collector. Considering some uncertainties in the input parameter values, the maximum difference between the predicted and the experimental results is about 10.6%, which is within an acceptable comparison range.