Potential for installing photovoltaic systems on vertical and horizontal building surfaces in urban areas
Potential for installing photovoltaic systems on vertical and horizontal building surfaces in urban areas
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DOI：
10.1016/j.solener.2013.04.021
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发表时间：
2013-07
期刊：
影响因子：
6.7
通讯作者：
Chun-Ming Hsieh;Yi-An Chen;H. Tan;Pei-Fang Lo
中科院分区：
文献类型：
--
作者：
Chun-Ming Hsieh;Yi-An Chen;H. Tan;Pei-Fang Lo
本研究以台湾日照丰富的台南市西中区为研究区域，分析屋顶及垂直立面之光伏电势。利用能量计算软件EnergyPlus和基于网格的计算流体力学(CFD)软件WindPerfect，从8个方向模拟计算了垂直墙面上遮阳和非遮阳两种情况下光伏组件产生的电能。建立了三个数据库--建筑立面产生的电能数据库、空间信息数据库和阴影覆盖数据库--以估计潜在电能。采用日照轨迹法模拟建筑表面遮阳情况，通过对累积日照时数和空间位置数据的分析，评价建筑表面的日照潜力。据观察，遮阳对垂直立面的影响更大。屋顶单位面积的平均发电量表明，夏季的电能是冬季的两倍。虽然冬季垂直立面单位面积发电量较高，但仅为夏季的1.1倍。如果考虑到发电量，西南墙的安装面积应该是屋顶的1.5倍，这样才能产生相同的电能。当考虑在本研究的研究区域和其他地理相似的位置安装光伏电池板时，应优先考虑屋顶，其次是东南、西南和南向的垂直立面。
This study analyzes the PV potential on rooftops and vertical facades in the research area of West Central District of Tainan City, a rich insolation area in Taiwan. By using the energy calculating software EnergyPlus and the grid-based computational fluid dynamics (CFD) software Windperfect, the electrical energy generated by PV modules on vertical walls from eight directions in both shading-covered areas and non-shading-covered areas was simulated and calculated. Three databases – the database of the electrical energy generated by building facades, of spatial information, and of shadow coverage – are established to estimate the potential electrical energy. The covered-shading condition was simulated by sunshine trajectory method, and the insolation potential of building surface was evaluated by analyzing the accumulating insolation hours and the spatial location data. It was observed that shading affects vertical facades more significantly. The average electricity generation of per unit area on rooftops demonstrates that the electrical energy in summer is twice as much as that in winter. Although the electrical energy generated by that of per unit area on vertical facades is higher in winter, it is only 1.1 times greater than that in summer. If the amount of electrical energy generated is taken into consideration, the installation area for the southwest walls should be 1.5 times larger than that of the rooftops so that the same amount of electrical energy can be generated. When considering the installation of PV panels in the research area of this study and other geographically similar locations, the priority should be the rooftops, followed by southeast-, southwest-, and south-facing vertical facades.