Abstract: Combining the quantitative inversion of remotely sensed data and GIS 3-D analysis techniques, a new model for calculating and assessing building-scale solar energy potential is built up. Specifically, the planar projection method is applied to determine the position and range of the building shadows, implementing real-time shadow simulation. The relative coordinate system and “inclusion-exclusion principle” are used to calculate the non-shadow areas of the building. The FY-2D and FY-3A satellite data are used to derive the direct normal irradiance in a regional scale, and the solar radiant power received by the roofs and facets of a specific building is then estimated using the proposed model. The solar radiation energy is summed up and the triangulated irregular network method is used to visualize the spatial distribution of the calculated energy data. A building community in Urumqi City, Xinjiang is selected as the study area to test the proposed model. The result shows that the proposed model can provide an effective and valuable tool for solar energy estimation and energy-wise planning on a building scale.

Key words: building scale, solar energy, resource potential, planar projection, 3-D analysis

摘要： 结合遥感定量反演方法与地理信息系统三维分析技术, 建立了城市建筑物尺度的太阳能资源潜力估算新方法和模型。运用平面投射法确定了建筑物阴影位置, 实现了阴影的实时模拟。利用局部坐标系和容斥原理计算了三维空间中的非阴影区面积。考虑光线与墙面之间的角度关系, 结合遥感反演得到的该建筑物所在位置的地表太阳直射辐照度, 计算该建筑物各侧面及顶面所能利用的太阳直射辐射功率, 进而求和得到观测时段内的累积太阳直射辐射能, 并采用不规则三角网显示该建筑物能接收到的能量资源的空间分布。选择乌鲁木齐市某建筑群对模型进行应用。结果表明, 该模型为建筑物尺度的太阳能资源规划及开发利用提供了一种有效的方法。

关键词: 建筑物尺度, 太阳能, 资源潜力, 平面投射法, 三维分析