选取亚热带地区常见植物搭建垂直绿化冠层太阳辐射特性观测平台。修正基于Lambert-Beer定律的冠层太阳辐射透过率模型。使用误差分析指标检验模型的计算精度。对模型的输入参数进行敏感性分析,发现叶面积指数是影响冠层太阳辐射透过率的重要参数。因此,对冠层全年的叶面积指数进行观测,计算全年不同朝向垂直绿化冠层的太阳辐射透过率,结果表明,垂直绿化冠层可拦截超过80%入射到建筑表面的太阳辐射,具有良好的遮阳效果。
Abstract
A platform for observing the solar radiation characteristics of vertical greening canopies was established with plants commonly used in subtropical regions. The model of canopy solar radiation transmittance based on the Lambert-Beer law was modified. The performance of the modified model was examined using error analysis indicators. Through a sensitivity analysis of the input parameters, it was found that the leaf area index （LAI） is a critical parameter affecting the canopy solar radiation transmittance. Therefore, the annual variations of the LAIs of the plants were observed. Then, the solar radiation transmittances of canopies with different orientations were determined using the modified model. The results indicated that the vertical greening canopies intercept over 80% of incident solar radiation.
关键词
被动太阳能建筑 /
太阳辐射 /
敏感性分析 /
光学特性 /
垂直绿化 /
冠层透过率
Key words
passive solar buildings /
solar radiation /
sensitivity analysis /
optical properties /
vertical greening /
canopy transmittance
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基金
国家重点研发计划（2019YFE0124500）; 国家自然科学基金（52178075; 51878288）
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