Toward mitigating urban heat island effects: Investigating the thermal-energy impact of bio-inspired retro-reflective building envelopes in dense urban settings
Toward mitigating urban heat island effects: Investigating the thermal-energy impact of bio-inspired retro-reflective building envelopes in dense urban settings
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DOI：
10.1016/j.enbuild.2015.05.040
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发表时间：
2015-09-01
影响因子：
6.7
通讯作者：
Pisello, Anna Laura
中科院分区：
文献类型：
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作者：
Han, Yilong;Taylor, John E.;Pisello, Anna Laura
超过三分之一的能源支出来自建筑物。城市化导致建筑物之间的空间相互关系更加紧密，由于建筑物之间的相互影响，从而导致建筑能源消耗不断增加。这反过来又加剧了城市热岛效应。我们寻求一种受生物启发的解决方案来解决这一重大工程问题，并发现花卉中存在类似的热岛效应，即“微温室效应”。然而，在温带花雪花莲中观察到特殊的冷却效果，它产生较低的花内温度。在本文中，我们研究了花瓣的特殊逆反射特性，这被认为是这种冷却效果的可能贡献者，并模拟了仿生逆反射建筑围护结构。我们对建筑网络进行了跨区域能源模拟，以检验其热能影响。我们发现，当邻近建筑物采用仿生反光立面进行改造时，建筑物表面温度大幅下降。我们得出的结论是，仿生反光建筑围护结构可以： (1) 减少空间邻近建筑物中太阳辐射的反射热量，从而降低城市热岛效应 (UHI)，以及 (2) 减少冷却所需的能量。这些发现对建筑设计、城市规划、逆反射技术的开发和环境保护具有广泛的影响。 (c) 2015 Elsevier B.V. 保留所有权利。
More than one-third of energy expenditure is attributable to buildings. Urbanization is leading to tighter spatial interrelationships among buildings, which is escalating building energy consumption due to the impact of buildings on one another. This, in turn, is exacerbating Urban Heat Island (UHI) effects. We sought a bio-inspired solution to this significant engineering issue and discovered a similar heat island effect in flowers, namely the "micro-greenhouse effect." However, a special cooling effect has been observed in a temperate flower Galanthus nivalis which generates cooler intrafloral temperatures. In this paper, we studied the special retro-reflecting property of the flower petals, which has been suggested as a possible contributor to this cooling effect, and modeled a bio-inspired retro-reflective building envelope. We conducted cross-regional energy simulation of building networks in order to examine its thermal-energy impact. We found that building surface temperatures dropped considerably when neighboring buildings were retrofitted with a bio-inspired retro-reflective facade. We concluded that a bio-inspired retro-reflective building envelope can; (1) lessen the reflected heat of solar radiation in spatially proximal buildings leading to reduced UHI, and (2) reduce the energy required for cooling. These findings have broad implications for building design, urban planning, development of retro-reflective technology, and environmental conservation. (c) 2015 Elsevier B.V. All rights reserved.