Analysis of retro-reflective surfaces for urban heat island mitigation: A new analytical model
Analysis of retro-reflective surfaces for urban heat island mitigation: A new analytical model
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DOI：
10.1016/j.apenergy.2013.10.038
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发表时间：
2014-02
期刊：
影响因子：
11.2
通讯作者：
F. Rossi;A. Pisello;A. Nicolini;M. Filipponi;Massimo Palombo
中科院分区：
文献类型：
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作者：
F. Rossi;A. Pisello;A. Nicolini;M. Filipponi;Massimo Palombo
建筑物围护结构和城市道路的太阳反射率是表征建筑物降温节能性能和减少城市热岛效应的重要光能量特性。与发射率一起，它代表了有助于减少暴露在阳光下的表面过热的主要特征。此外，除其他因素外，太阳能反射率还取决于入射能量的角分布。此外，太阳能反射率取决于入射能量的角分布，该影响很少被考虑以估计其冷却潜力。本文对逆反射膜的角反射率进行了实验和分析研究。设计了一个专门的实验装置来测量回射样品的角反射率。测量结果被用来确定一个原始的分析模型，该模型描述了回射材料的光能行为。实验活动和一种新的分析模型表明，逆反射材料可以有效地应用于城市路面和建筑围护结构的涂层，以反射城市峡谷和城市冠层以外的太阳辐射。
Solar reflectance of buildings’ envelope and urban paving represents an important optic-energetic property for the characterization of building energy performance for cooling and to reduce the urban heat island effect. Together with the emissivity, it represents the main feature contributing to the overheating reduction of a surface exposed to sunlight. Additionally, solar reflectance depends, among other factors, also on the angular distribution of the incident energy Additionally, solar reflectance depends on the angular distribution of the incident energy, which effect is rarely taken into account to estimate its cooling potential. This paper deals with an experimental and analytical study for the assessment of the angular reflectance of retro-reflective films. An ad hoc experimental facility is designed to measure the angular reflectance of retro-reflective samples. Measurement results are used to determine an original analytical model which describes the optic-energy behavior of retro-reflective materials. The experimental campaign and a novel analytical model showed that retro-reflective materials could be effectively applied as coatings on urban paving and building envelope, in order to reflect the solar radiation beyond the urban canyon and the urban canopy in general.