关键词: 建筑物尺度, 太阳能, 资源潜力, 平面投射法, 三维分析

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