태양광 어레이의 배열 및 설치 각도에 따른 순풍압력분포 특성
Net Wind Pressure Distribution Characteristics of Photovoltaic Array at Various Tilt Angles and Arrangements
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'화석연료의 사용은 대기가 오염되어 지구온난화와 이상기후 등의 문제를 야기하고 있다. 우리나라는 탄소 배출량을 줄이기 위하여 신재생에너지 개발에 관심이 집중되었고, 신재생에너지에 관한 정책 중 ‘그린 홈 100만호 보급사업’을 통해 일반 주택에 태양광 발전기 보급이 확대되었다. 태양광 발전기는 외부에 노출되어 있어 직접적으로 태풍과 같은 강풍에 영향을 받게 된다. 따라서 보급이 확대된 만큼 피해사례도 증가하고 있다. 본 연구에서는 태양광 발전기의 안전한 내풍설계를 위하여 주택설치 용량에 부합하는 태양광 발전기 형태를 특정하여 풍동실험을 진행하였다. 태양광 발전기의 모듈을 동일 면적의 정사각형(3 by 5 어레이), 직사각형(5 by 3 어레이)으로 배열하고 설치 각도를 30°, 35°, 40°로 하여 변수에 따른 풍압분포와 피크순압력계수를 산출하였다. 전체적으로 설치 각도가 증가할수록 값은 줄어들었으며 어레이 상부 모서리에서 상방향, 하부 모서리에서 하방향의 피크순압력계수가 지배적이었다. 또한 대체로 정사각형(3 by 5 어레이)보다 직사각형(5 by 3 어레이)의 배열이 바람에 더 불리한 것으로 나타났다.
Abstract
'The use of fossil fuels pollutes the atmosphere and causes problems such as global warming and abnormal climate. In Korea, attention was attracted on the development of alternative energy in order to reduce carbon emissions. Among the alternative energy policies, the supply of photovoltaic generator to general houses was expanded through the “One Million Green Homes Program”. Photovoltaic generators are exposed to unfavourable outdoor conditions and are directly affected by strong wind events such as typhoons. Therefore, wind damage to the photovoltaic generators is also increasing with their widespread popularization. In this study, wind tunnel tests were conducted to identify wind-resistant performance of photovoltaic generator types suitable for the installation capacity on houses. The photovoltaic generators with two (5 by 3 and 3 by 5) rectangular arrays of the same area and their three (30°, 35°, and 40°) tilt angles were considered. Wind pressure distribution and peak net wind pressure coefficient for the configurations was evaluated. Overall, the value decreased as the tilt angle increased, and the peak net wind pressure coefficient in the upwind direction at the upper corner of the array and the downwind direction at the lower corner were dominant. In addition, it was found that the rectangular (3 by 5 array) arrangement was more vulnerable to strong wind than the square (5 by 3 array) one.
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