太陽能板設置於不同斜屋頂上所受風壓之初探

A Preliminary Study of Wind Pressures on Solar Panel Installed on Gable Roofs

陳若華(Ruo-Hua Chen) ； 包匡(Kuang Bao) ； 曾亮(Liang Zeng) ； 李旻原(Min-Yuan Li)

《空間設計學報》 13期 (2012/06) Pp. 13-20

https://doi.org/10.30015/JIAD.201206.0002

摘要

本研究探討不同坡度的屋頂對於設置於其上的太陽能板，其所受風壓之影響，以四種坡度斜屋頂上安裝的太陽能板為對象，進行風洞實驗，探討其所受之淨風壓所產生的影響。實驗於均勻紊流場以不同風攻角來進行試驗，太陽能板模型形式為一般太陽能尺寸規格比例1/20進行製作，測量太陽能板所受風壓之變化，並探討產生表面壓力與下方推升力之風的流況，並找出風場影響最大及影響最小之區位和壓力值。由本研究顯示屋頂坡度較陡峭者，對於下風側的太陽能板將起遮蔽的作用，而如太陽能板位於上風側，則因局部氣流加速引起太陽能板受到負壓作用，但仍屬較不嚴重的情形。而屋頂坡度較為平緩的情形下，太陽能板受到負風壓的作用較為嚴重，不利於結構安全。在風攻角方面，不利於結構安全的風攻角主要發生在22.5～45度之間，而非規範中提供的正吹型態。由整體昇力的比較更可明顯看到負風壓作用將使得太陽能板被掀翻的可能性增加，因此安裝時須有近一步防護措施，以為提升結構系統的耐風性能。

關鍵字

太陽能板 ； 風洞試驗 ； 表面風壓

並列摘要

The purposes of this study are trying to understand the wind pressure on each part of the solar panel when install on variant slopes of the gable roofs. A series of wind tunnel experiments were conducted to examine the wind pressures which acting on variant area of the panel model. Also the angles of approaching flow to the model were checked. The building models were set with gable roofs and the solar panel model was installed at the central region of roof. The solar panel models are made of acrylic board and the scale is 1/20. The uniform distributed pressures taps were set on the surface of solar panel model to collect the surface wind pressures. The area weighted net pressures coefficients were the analysis target in this study. The results shown that the steep gable roof would cause the sheltering effect, it is skewed safe side to the solar panel. Due to the strong corner vortex on the lower slope gable roofs, the lift forces of panel were enhanced. We had found that the dangerous wind angle will be among 22.5 to 45 degrees. This is different to the suggest situation in building code. So the support structure system of these solar panels should be paid more attention.

並列關鍵字

solar panel ； wind tunnel experiment ； surface pressure