RESEARCH ON WIND LOAD VALUE OF PHOTOVOLTAIC BRACKET BASED ON WIND TUNNEL TEST AND STANDARD VALUES

Chen Quan; Niu Huawei; Li Hongxing; Jiang Dong

doi:10.19912/j.0254-0096.tynxb.2023-0664

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Acta Energiae Solaris Sinica ›› 2024, Vol. 45 ›› Issue (9) : 259-267. DOI: 10.19912/j.0254-0096.tynxb.2023-0664

RESEARCH ON WIND LOAD VALUE OF PHOTOVOLTAIC BRACKET BASED ON WIND TUNNEL TEST AND STANDARD VALUES

Chen Quan¹, Niu Huawei¹, Li Hongxing², Jiang Dong²

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Abstract

In order to improve the wind load research of photovoltaic bracket. First, the calculation principle of wind load of photovoltaic bracket of various standards and the value characteristics of related parameters were compared and analyzed. Second, the shape coefficients of the solar structure under the combination of typical inclination angles and wind directions were derived by performing a rigid model load measurement wind tunnel test on a fixed adjustable photovoltaic. Transient analysis was used to determine the photovoltaic bracket wind vibration coefficients under normal operating settings from the results of the wind tunnel tests. Finally, the wind load values and related parameters obtained by the test were compared with the reference values of each standards. The findings demonstrate that there are clear discrepancies between various standards and wind tunnel tests' wind pressure coefficients, wind vibration coefficients, and wind loads. The wind pressure coefficient of the wind tunnel test is substantially lower than the stated value of each standards, and the wind vibration coefficient result is higher than the domestic standard value of 1.0, more than 1.64-2.05 times, and there is also a considerable difference with foreign standards. In general, when a structure is upwind as opposed to leeward, the wind load and wind pressure coefficient are lower. The wind resistance design of photovoltaic bracket according to Chinese standards is radical, while the outcomes are conservative by foreign standards. More wind resistance studies are required in order to safely and rationally guide the wind resistance design of photovoltaic bracket structures because the wind load provisions in common standards are not reasonable.

Key words

photovoltaic bracket / wind load / wind tunnel test / standard / finite element

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Chen Quan, Niu Huawei, Li Hongxing, Jiang Dong. RESEARCH ON WIND LOAD VALUE OF PHOTOVOLTAIC BRACKET BASED ON WIND TUNNEL TEST AND STANDARD VALUES[J]. Acta Energiae Solaris Sinica. 2024, 45(9): 259-267 https://doi.org/10.19912/j.0254-0096.tynxb.2023-0664

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