Optimization of solar collector tilt angle based on coupled radiation model
In order to maximize the solar radiation yield,it's imperative to optimize the inclination angle of the solar collector.To this end,a calculation model for solar radiation on inclined surfaces was established,and the computation processes for direct and scattered radiation were separately streamlined.MATLAB was utilized to analyze and perfect the elevation angle of the collector,which led to the determination of monthly and annual optimum inclination angles.The research disclosed that the ideal annual inclination angle in Tianjin is 36.3 °,marginally inferior to the local latitude.The monthly tilt angle should vary between 10～64 °,with lower degrees in summer and higher in winter.Placing the collector horizontally enhances annual solar radiation by 12.4%and 17.3%at the optimal yearly and monthly inclination angles,correspondingly.Adjusting the optimum tilt angle by 5.0%is feasible when compared with using the local latitude as the tilt angle.Taking Guangzhou,Lhasa,Jinan and Changchun as examples,the annual and monthly optimum tilt angles of these regions are calculated.The comparative analysis of various cities revealed that for regions with high direct radiation proportion,refining the optimal angle on a monthly basis leads to higher energy gains.
solar irradiance modelcollectoroptimum tilt angleoptimization design
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