A Study on Solar Photovoltaic Array Surface Morphology Variation in Sandy Area Based on Wind Tunnel Test

Tang Guodong; Meng Zhongju; Gao Yong; Dang Xiaohong; Guo Jianying; Xing Ende

doi:10.13961/j.cnki.stbctb.2022.04.001

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A Study on Solar Photovoltaic Array Surface Morphology Variation in Sandy Area Based on Wind Tunnel Test

- A Study on Solar Photovoltaic Array Surface Morphology Variation in Sandy Area Based on Wind Tunnel Test
- Bulletin of Soiland Water Conservation Vol. 42, Issue 4, Pages: 1-8(2022)
- 作者机构：
  
  1. 中国水利水电科学研究院内蒙古阴山北麓草原生态水文国家野外科学观测研究站,北京,100038
  2. 水利部牧区水利科学研究所,内蒙古,呼和浩特,010020
  3. 内蒙古农业大学沙漠治理学院/内蒙古自治区风沙物理与防沙治沙工程重点实验室,内蒙古,呼和浩特,010011
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2022.04.001
  CLC： TM615
- Published：2022
- 稿件说明：
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Tang Guodong, Meng Zhongju, Gao Yong, et al. A Study on Solar Photovoltaic Array Surface Morphology Variation in Sandy Area Based on Wind Tunnel Test[J]. Bulletin of Soiland Water Conservation, 2022, 42(4): 1-8.
DOI：

Tang Guodong, Meng Zhongju, Gao Yong, et al. A Study on Solar Photovoltaic Array Surface Morphology Variation in Sandy Area Based on Wind Tunnel Test[J]. Bulletin of Soiland Water Conservation, 2022, 42(4): 1-8. DOI： 10.13961/j.cnki.stbctb.2022.04.001.

摘要

[目的] 研究库布齐沙漠中段沙区光伏阵列扰动下地表形态变化规律及其与风环境的关系，为科学制定沙区光伏电站次生风沙危害防治技术方案提供理论依据。[方法] 运用风洞试验方法，分析光伏阵列与风向之间夹角为0°，45°，90°，135°和180°时光伏阵列地表蚀积空间分布规律和地表形态剖面特征。[结果] 夹角为±90°时，迎风侧前两排电板区域地表蚀积变化表现为风蚀以中度和重度为主，堆积以轻度为主。第3—5排电板区域在前两排电板的遮蔽作用下风沙活动强度大幅降低。夹角为±45°时所有电板区域蚀积变化规律较为相似；45°时蚀积变化表现为风蚀以中度和重度为主，堆积以中度和轻度为主，小范围出现重度堆积现象；-45°时风蚀和堆积均表现为以轻度和中度为主。以8 m/s风速条件为例，不同夹角条件光伏阵列地表蚀积强度表现为：45°>90°>-45°>-90°>0°。夹角为0°时最小，蚀积变化极差仅为1.265 cm。夹角为45°时最大，蚀积变化极差可达5.429 cm。夹角绝对值相等符号相反风况条件下，夹角为正值相较负值时光伏阵列地表风沙活动更为强烈。夹角为45°时蚀积强度是夹角为-45°时的1.566倍，夹角为90°时则是夹角为-90°时的1.269倍。[结论] 沙区光伏阵列次生风沙危害的防治技术方案设计应充分考虑区域主害风向条件。

Abstract

[Objective] The surface morphology changes and its relation with wind environment under wind regime disturbance by a solar photovoltaic array in a sandy area of the middle part of Kubuqi Desert

in order to provide a theoretical basis for determining a technical scheme to minimize wind and sand hazards at solar photovoltaic (PV) power stations.[Methods] Spatial distribution of surface erosion and deposition and characteristics of the surface morphology profile at five angles (0°

45°

90°

135°

and 180°) between the solar PV array and the wind direction were analyzed by wind tunnel experiments.[Results] When the included angle between the solar PV array and the wind direction was ±90°

the surface erosion intensity was mainly moderate and severe

and deposition intensity was mainly mild. Surface erosion intensity was greatly reduced in the 3rd to 5th rows of panels because of sheltering effects. The erosion and deposition change law for all panel areas was similar at the ±45° angles. When the included angle was -45°

the surface erosion and deposition intensity were mainly mild and moderate. but severe deposition intensity occurred in a small area. When the included angle was -45°

the surface erosion intensity was mainly moderate and mild

and deposition intensity was mainly mild and moderate. The surface erosion and deposition intensity at the different included angles followed the order of 45°>90°>-45°>-90°>0°. As an example

when wind speed was 8 m/s

the surface erosion and deposition intensity were the smallest with the 0° angle

and the range of surface erosion and deposition was only 1.265 cm. The surface erosion and deposition intensity were the largest with the 45° angle

and the range of erosion and deposition reached 5.429 cm. In addition

when the absolute value of the included angle was equal and the sign was opposite

the wind and sand activity on the surface of the photovoltaic array was stronger when the included angle was positive than when it was negative. When the included angle was 45°

the surface erosion and deposition intensity was 1.566 times higher than that was -45°. When the included angle was 90°

the surface erosion and deposition intensity was 1.269 times higher than that was -90°.[Conclusion] The design of technical schemes to minimize wind and sand hazards at solar PV power stations in sandy areas should fully consider the prevailing wind direction conditions.

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