摘要
太阳辐射是影响城市室外热环境的关键气象要素。在西安建筑科技大学校园内18个具有不同街道形态特征的地点进行了太阳辐射日总值实测,并利用百度地图平台获取了街道全景图。利用PTgui和Rayman模型软件对全景图进行分析后获取了鱼眼图像、天空开阔度(SVF,Sky view factor)和树木遮挡水平(TVF,Tree view factor)数据,在每个测点利用鱼眼图像与SVF分别采用两种不同的计算方法对该测点的太阳总辐射日总值进行了计算,并依据TVF对每个测点进行了分类。将计算结果与实测结果对比后,结合分类结果,发现在TVF较大(TVF≥0.3)和较小(TVF<0.3)的点分别采用不同的方法,得出的计算值与实测值更接近。综上,为了保证计算结果的准确性,在进行测试城市中不同地点的太阳辐射日总值计算时,应依据测点的环境形态特征选取不同的计算方法。
The daily global solar radiation is tested at 18 locations with different morphological characteristics in Xi’an University of Architecture and Technology.PTgui is used to convert the panoramic pictures from Baidu map platform to fisheye images.Sky view factor(SVF)and tree view factor(TVF)are calculated by Ray man model with fisheye images.SVF is used to calculate the daily global solar radiation at the 18 locations with two different methods and TVF is used to classify the locations.The calculations and testing results are compared and combined the analysis of the morphological characteristics is combined.Then it is found out that using suitable methods on different locations is necessary to obtain more accurate results whether the TVF(tree view factor)is more than 0.3 or less.In conclusion,when the solar radiation is calculated at different locations in the urban area,the calculating methods applied should be carefully chosen through the morphology characteristics of the location.
作者
刘衍
张沫岩
陈睿昕
郭向斐
杨柳
LIU Yan;ZHANG Mo-yan;CHEN Rui-xin;GUO Xiang-fei;YANG Liu(State Key Laboratory of Green Building in Western China,Xi’an University of Architecture and Technology,Xi’an 710055,China;School of Architecture,Xi’an University of Architecture and Technology,Xi’an 710055,China)
出处
《建筑节能》
CAS
2020年第7期53-57,共5页
BUILDING ENERGY EFFICIENCY
基金
国家自然科学基金重点项目(51838011)
国家自然科学基金青年项目(51808429)
中国科协“青年人才托举工程”计划(2018QNRC001)
