地面陣列型太陽光電系統之風力研究

THE STUDY ON WIND LOADS ACTING ON GROUND-MOUNTED PHOTOVOLTAIC ARRAYS

傅仲麟(Chung-Lin Fu) ； 黃朝揚(Chao-Yang Huang) ； 詹麒璋(Chi-Chang Chan) ； 羅元隆(Yuan-Lung Lo)

《中國土木水利工程學刊》 30卷1期 (2018/03) Pp. 73-81

https://doi.org/10.6652/JoCICHE.201803_30(1).0007

摘要

本研究主要針對地面陣列型太陽光電系統，執行風洞模擬試驗之相關工作，進行系統抗風設計之研究。研究結果發現，陣列型太陽能光電板系統在陣列前後緣區及角隅區，所受淨風壓最大；左右邊緣區域之淨風壓，約為最大風壓之80%。中央區域約為最大風壓之40%～60%間。此外，在扭力方面，光電板呈水平時，在前後緣區光電板所受之扭力明顯大於大傾角時之扭力。此現象會導致陣列型太陽能光電板，在邊緣區域之支撐架抗扭元件之設計承載力不足，造成支撐架產生扭力破壞。因此對於陣列型太陽光電系統，加強抗扭元件之設計對於減低受風破壞而言相當重要。

關鍵字

太陽光電系統 ； 風洞試驗 ； 設計風壓

並列摘要

This study investigates design wind forces on photovoltaic arrays mounted on rooftop by means of physical scaled wind tunnel tests. Wind tunnel test were conducted in No. 2 atmospheric turbulent boundary layer flow wind tunnel laboratory at Tamkang University. Open terrain was simulated with properly equipped spires and roughness blocks. Three models in 1:100 scale, including the ones with tilt angle of-45°, 45°, and 0°, are installed and surface pressures on each panel plate were measured in every 10 degrees. Design wind pressure coefficients were then discussed based on experimental results. Results showed that net pressures in the front, rare, and corner regions of photovoltaic arrays are larger when the tilt angle is large; the absolute values of left and right edge regions are about 80% of that of front and rare edge regions. The net pressures in the middle region are obviously lower, say 40 ~ 60 % of that in the front and rare regions. Pressure differences are large in different regions for array type of photovoltaic systems. Identical design for supporting systems of all panels leads to uneconomical or unsafe design. Besides, when the tilt angle is in zero degree, torsion of panels in the front and rare regions are significant and may result in torsional failure in supporting components. This study indicated that failure mode of a photovoltaic system needs more careful examinations.

並列關鍵字

photovoltaic array ； wind tunnel test ； design wind pressure