풍하중을 받는 지상설치형 태양광 패널의 풍력계수 분포에 관한 연구

다국어 초록 (Multilingual Abstract)

In the past few years, solar energy has been developed mainly in accordance with the active promotion of renewable energy, and solar power generation business is rapidly increasing. As a result, studies on the performance of solar panels are constantly being conducted, but there is a lack of research on solar systems supported as structures.
In Korea, there is no standard for the design load of the solar system installed as a structure, so the standard of the independent roof is used. However, even with the same solar system, the influence of air currents will be greatly different in various conditions such as panel angle and array arrangement of solar panels as well as panel interval and separation distance. The standard of independent roofs may lack trust in the structural safety of such solar systems.
Therefore, this study conducted wind tunnel experiment to prepare systematic design load standards by analyzing lift force, drag force, and normal force according to wind direction angle and position change for wind load applied to multi array solar system used for the arrangement of large solar power generation system installed on the ground.
Wind tunnel experiment was conducted by independent experiment and array experiment. The model of the independent experiment was 1:25 scale, and each panel was arranged through 8×2 array, and experiment was conducted as a single structure. In the solar array experiment, a total of 15 models were installed with 3×5 arrays of single experiment model.
The wind coefficients were obtained by the terrain category and the wind direction angle by the panel angle of inclination through the independent experiment. The wind coefficient distribution by the array position was identified by the wind direction angle as well as the comparison with the single experiment through the array experiment. In addition, the difference between the wind force coefficient and the net pressure coefficient of the independent roof of the domestic design load standard was confirmed.
The results show that the uniformity of the panel angle is greater than the condition of the errain category C and the larger the panel angle of inclination is increased. In addition, except for some positions in the array arrangement, the coefficient distribution is lower than the single experiment overall, and the coefficient is large in the row closest to the mean flow direction and it is greatly reduced in the next row. Overall, the coefficients of the array arrangements were relatively high and higher than the single experiment.

목차 (Table of Contents)

• 1. 서론 1
• 1.1 연구배경 1
• 1.2 태양광 설치 및 피해사례 3
• 1.3 연구동향 6
• 1.4 연구 내용 및 목적 10
• 2. 풍동실험 11
• 2.1 풍동실험 개요 11
• 2.2 실험모형 12
• 2.3 풍동내 기류상사 16
• 2.4 실험장비 20
• 2.4.1 풍속측정 장치 20
• 2.4.2 풍력측정 장치 20
• 2.5 풍력실험 22
• 3. 실험 결과 및 해석 25
• 3.1 풍력계수 25
• 3.2 태양광 단독실험에 따른 풍력계수 27
• 3.2.1 조도 구분에 따른 태양광 패널의 풍력계수 27
• 3.2.2 태양광 패널의 경사각에 따른 풍력계수 29
• 3.2.3 태양광 패널의 경사각에 따른 풍력계수 31
• 3.2.4 태양광 패널의 경사각에 따른 풍력계수 33
• 3.2.5 태양광 패널의 경사각별 풍력계수 35
• 3.2.6 역풍과 순풍에 대한 단독실험의 풍력계수 37
• 3.3 어레이 내에서 행에 따른 풍력계수 39
• 3.3.1 a행에서의 풍력계수 39
• 3.3.2 b행에서의 풍력계수 41
• 3.3.3 c행에서의 풍력계수 43
• 3.4 어레이 내에서 열에 따른 풍력계수 45
• 3.4.1 1열에서의 풍력계수 45
• 3.4.2 2열에서의 풍력계수 47
• 3.4.3 3열에서의 풍력계수 49
• 3.4.4 4열에서의 풍력계수 51
• 3.4.5 5열에서의 풍력계수 53
• 3.5 태양광 어레이의 풍력계수 분포도 55
• 3.5.1 순풍에 대한 풍력계수 분포도 55
• 3.5.2 역풍에 대한 풍력계수 분포도 57
• 3.5.3 풍향각 0˚에 대한 풍력계수 분포도 59
• 3.5.4 풍향각 45˚에 대한 풍력계수 분포도 61
• 3.5.5 풍향각 135˚에 대한 풍력계수 분포도 63
• 3.5.6 풍향각 180˚에 대한 풍력계수 분포도 65
• 3.5.7 풍향각 225˚에 대한 풍력계수 분포도 67
• 3.5.8 풍향각 315˚에 대한 풍력계수 분포도 69
• 3.6 소결 71
• 3.6.1 태양광 단독실험에 따른 풍력계수 71
• 3.6.2 태양광 어레이실험에 따른 풍력계수 71
• 4. 각국 기준의 하중계수 평가 73
• 4.1 국내기준(KDS 40 10 15 : 2019) 73
• 4.2 해외기준 77
• 4.2.1 일본(JIS C 8955) 77
• 4.2.2 미국(ASCE 7-10) 80
• 4.2.3 호주,뉴질랜드(AS-NZS 1170.2) 82
• 4.3 소결 84
• 5. 결론 85
• 참고문헌 87