Development of Two New Types of Retroreflective Materials as Countermeasures to Urban Heat Islands
Development of Two New Types of Retroreflective Materials as Countermeasures to Urban Heat Islands
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DOI：
10.1007/s10765-017-2266-y
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发表时间：
2017-07
影响因子：
2.2
通讯作者：
Hideki Sakai;H. Iyota
中科院分区：
文献类型：
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作者：
Hideki Sakai;H. Iyota
本研究讨论了高反光材料和普通反光材料作为城市热岛对策的副作用。此外，还提出了两种逆向反射材料以避免这些不利影响。这些材料可应用于道路和建筑外部，以减少其对太阳辐射的吸热。第一种提出的类型是定向逆向反射材料，仅在夏季反射光线；因此，减少了夏季的制冷负荷，减少了冬季的供暖负荷，防止了夜间的光污染。但其结构复杂、脆弱；因此，它适用于较小的区域，例如屋顶和墙壁。第二类是粗糙面逆反射材料，逆反射性能较弱，但能承受畸变；因此，它适用于道路。这两种类型几乎不需要维护，因为它们没有活动部件。因此，这些材料不会发生任何损坏，这对于道路和建筑材料来说是一个很大的优势。将高反光、普通反光、定向反光和粗糙表面反光材料结合起来，并将每种类型分配给适当的应用，将形成针对城市热岛的先进缓解系统。
In this study, the side effects of high-reflective and ordinary retroreflective materials, used as countermeasures to urban heat islands, are discussed. In addition, two retroreflective materials are proposed in order to avoid these adverse effects. These materials could be applied to roads and building exteriors to reduce their heat absorption from solar radiation. The first proposed type is the directional retroreflective material, which reflects light only during summer; therefore, it reduces the cooling load in summer, reduces the heating load in winter, and prevents light pollution at night. However, its structure is complicated and fragile; thus, it is suited for small areas, such as roofs and walls. The second type is the rough-surface retroreflective material, which shows weak retroreflectivity but can withstand distortion; thus, it is suited for roads. These two types require little maintenance, because they have no moving parts. Hence, these materials would not experience any breakdown, which is a great advantage for roads and building materials. Combining high-reflective, ordinary retroreflective, directional retroreflective, and rough-surface retroreflective materials, and assigning each type to the appropriate application would form an advanced mitigation system against urban heat islands.