Calculation and Analysis of Optimal Tilt Angle for PV/T Hybrid Collector

Xianping Liu
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引用次数: 13

Abstract

The use of solar energy received world wide attention in recent years. Solar energy is a free and clean natural resource which can be utilized by using a solar collector. In this paper, a model was presented for the calculation of the optimal tilt angle in Changsha. The anisotropic Hay's model of the sky was selected and by combining it with standard formulas for the two remaining components. The yearly optimal tilt angle and monthly optimal tilt angles for a solar collector were calculated using the aforementioned model. Then, the total collectible radiations on the collector surface with different kind of optimal tilt angles, such as yearly optimal tilt angle, monthly tile angle and local latitude, were calculated and compared. The results show that the yearly optimal tilt angle for a solar collector in Changsha is 19.22 degree near 10 degree less than the site latitude. Choose the optimal tilt angle can effectively improve the annual collectible radiation of a solar collector. Taking adjusted monthly optimum tilt angle and fixed yearly optimal angle, compared to the tilt angle of site latitude angle, the annual collectible radiation per square meter per year for a solar collector increase in 208.89MJ and 90.55MJ, enhance by 5.2% and 2.2 %, respectively.
PV/T混合集热器最佳倾角计算与分析
近年来,太阳能的利用受到了全世界的广泛关注。太阳能是一种免费、清洁的自然资源,可通过太阳能集热器加以利用。本文建立了长沙市最优倾斜角的计算模型。我们选择了各向异性的Hay的天空模型,并将其与其他两个部分的标准公式相结合。利用上述模型计算了太阳能集热器的年最佳倾角和月最佳倾角。然后,计算并比较了不同最佳倾角(年最佳倾角、月最佳倾角和当地纬度)下集热器表面的总可收集辐射;结果表明:长沙市太阳能集热器的年最佳倾角为19.22度,比站点纬度低近10度。选择最佳倾斜角度可以有效提高太阳能集热器的年收集辐射。采用调整后的月最佳倾角和固定的年最佳倾角,与站点纬度角的倾角相比,太阳能集热器年每平方米的年可收集辐射分别增加了208.89MJ和90.55MJ,分别提高了5.2%和2.2%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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