三维环境下的建筑表面太阳能潜力估计

提出一种结合屋顶及立面,考虑天气因素影响的城市级建筑表面太阳能潜力估计方法.以建筑轮廓矢量数据和高度信息为基础,重建三维城市环境;基于射线求交方法、纹理映射和太阳辐射模型计算和渲染建筑表面太阳辐射;利用长期日照时数气象数据和天气校正模型对建筑表面接收的太阳辐射进行辐射校正,并通过气象站太阳辐照度辐射观测数据对校正结果进行有效性验证.结果表明：相关系数r和均方根误差RMSE分别为0.85和0.99 kW·h·m^-2,具有一定的有效性.应用该方法对研究区进行时空特征分析,研究结果可为城市清洁能源利用评估提供方法,为低碳城市的设计和管理提供一定参考.

Solar energy potential estimation of building surface based on three-dimensional environment

The development and utilization of solar energy on the surface of urban buildings will promote urban energy conservation and emission reduction, green, low-carbon and sustainable development. This paper presents an estimation method of solar potential of urban building surface, which combines roof and facade and considers the influence of weather factors. The three-dimensional urban environment is reconstructed by using building contour vector data and height information. The shadow occlusion relationship among entities in three-dimensional urban environment is analyzed by ray intersection method. Based on texture mapping and solar radiation model, the solar radiation on the building surface is calculated and rendered. The long-term sunshine hours meteorological data and weather correction model are used to correct the solar radiation received by the building surface. Taking Fuzhou as an example, the validity of the radiation correction results is verified by using the solar irradiance radiation observation data of the meteorological station, Our show that the correlation coefficient and root mean square error are 0.85 and 0.99kWh/m_² respectively. The annual solar irradiance and solar radiation of the roof in the study area are 954.58 kWh/m_² and 37.61 TWh respectively, The annual solar irradiance and solar radiation of the facade are 306.17 kWh/m_² and 26.03 TWh separately. The research results will provide some methodologies for urban clean energy utilization evaluation and are useful for low-carbon cities design and management.