Estimation of Solar Radiation and Optimal Tilt Angles of Solar Photovoltaic for Khon Kaen University

Chawyuyu Khin, P. Buasri, Rongrit Chatthawom, A. Siritaratiwat
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引用次数: 4

Abstract

In order to maximize the output energy of a solar photovoltaic, the surface of a solar panel is required to be perpendicular to the direction of the solar ray. Therefore, a solar tracker is widely used for maximizing the output energy of solar photovoltaic. However, a solar tracker is expensive and not suitable for some locations. Another solution to maximize the output energy of a solar photovoltaic is setting the optimal tilt angles. The advantage of this solution is no additional cost of device but the obtained energy is less than the solution using solar tracker. This work is a systematic approach to find out the optimal tilt angles for Khon Kaen University $\pmb{(\text{Latitude} =16.472^{\circ}\text{N}}$ and Lo $\mathbf{ngitude}=\pmb{102.826^{\circ}\text{E}}$). Calculation and experimental methods are used to find out the monthly, seasonally and yearly optimal tilt angles. For the calculation method, optimal tilt angles were mathematically determined by finding maximum daily solar radiation received by changing tilt angles from 0° to 60° of a 5° per step of change. For the experimental method, optimal tilt angles were determined by setting a 5-W monocrystalline solar photovoltaic for five various tilt angles consisting of 0°, 16°, 30°, $\pmb{45^{\circ}}$ and $\pmb{60^{\circ}}$. The experiment was conducted from March to May. From the results, monthly optimal tilt angles from experiment and calculation methods are nearly the same.
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孔庆大学太阳辐射估算及太阳能光伏最佳倾斜角度
为了使太阳能光伏发电的输出能量最大化,太阳能电池板的表面需要垂直于太阳光线的方向。因此,太阳能跟踪器被广泛用于最大化太阳能光伏发电的输出能量。然而,太阳能跟踪器价格昂贵,不适合在某些地方使用。另一个最大化太阳能光伏输出能量的解决方案是设置最佳倾斜角度。该解决方案的优点是没有额外的设备成本,但获得的能量比使用太阳能跟踪器的解决方案少。这项工作是一种系统的方法来找出孔亨大学$\pmb{(\text{Latitude} =16.472^{\circ}\text{N}}$和Lo $\mathbf{ngitude}=\pmb{102.826^{\circ}\text{E}}$)的最佳倾斜角度。采用计算和实验相结合的方法确定了月、季、年最佳倾斜角。在计算方法中,通过将倾角从0°变化到60°,每步变化5°,求出最大日太阳辐射,从数学上确定最佳倾斜角。在实验方法中,通过设置5 w单晶太阳能光伏,确定最佳倾角为0°、16°、30°、$\pmb{45^{\circ}}$和$\pmb{60^{\circ}}$ 5种不同倾角。实验于3月至5月进行。从实验结果看,每月最佳倾斜角与计算方法基本一致。
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