Direct and indirect effects of high-albedo roofs on energy consumption and thermal comfort of residential buildings
Direct and indirect effects of high-albedo roofs on energy consumption and thermal comfort of residential buildings
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高反照率屋顶对住宅建筑能耗和热舒适度的直接和间接影响
DOI：
10.1016/j.enbuild.2018.08.048
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发表时间：
2018
影响因子：
6.7
通讯作者：
Ban-Weiss, George A
中科院分区：
文献类型：
--
作者：
Baniassadi, Amir;Sailor, David J;Crank, Peter J;Ban-Weiss, George A
在过去的三十年里，高反照率屋顶作为一种缓解城市热岛效应和减少冷却能源需求和成本的策略得到了推广。此外，高反照率屋顶可以增加非空调建筑的热舒适性。这些屋顶的节能和热舒适效益有两个组成部分：1 .通过减少屋顶吸收的短波辐射对单个建筑物的直接效益；2 .通过降低环境空气温度而产生的邻里规模的间接效益，特别是当大规模部署高反照率表面时。本研究旨在量化这些直接和间接效益的相对重要性，并确定它们如何受到建筑和气候特征的影响。我们对洛杉矶地区三个具有不同特征的地点（一个沿海，两个内陆）的一组典型的单户住宅建筑进行了整体建筑能量模拟。我们的模拟表明，间接效应带来的收益可能与直接效应的收益相同。更重要的是，这些好处取决于气候和建筑特点。在长滩的一栋低性能建筑（由气密性和天花板绝缘水平定义）中观察到最高的能源和热舒适效益，模拟表明，由于直接和间接影响的结合，节能41%，热舒适改善23%。
Over the past three decades, high-albedo roofing has been promoted as a strategy to mitigate the urban heat island effect and reduce cooling energy demand and costs. In addition, high-albedo roofs can increase thermal comfort in non-conditioned buildings. Energy saving and thermal comfort benefits from these roofs have two components: 1- Direct benefits to individual buildings by reducing absorbed shortwave radiation through the roof, and 2- Neighborhood-scale indirect benefit resulting from reduced ambient air temperatures, particularly when high-albedo surfaces are deployed on a large scale. This study is an effort to quantify the relative importance of these direct and indirect benefits and identify how they are affected by building and climate characteristics. We used whole-building energy simulations of a set of archetypical single family residential buildings in three locations with distinct characteristics within the Los Angeles area (one coastal, and two inland). Our simulations show that benefits from the indirect effect can be the same order of magnitude as the direct effects. More importantly, these benefits depend on the climate and building characteristics. The highest energy and thermal comfort benefits were observed in a low-performance building (defined by airtightness and ceiling insulation level) in Long Beach, where simulations indicated an energy savings of 41% and thermal comfort improvement of 23% due to a combination of direct and indirect effects.
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影响因子：
7.4
作者：
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通讯作者：
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影响因子：
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Mavrogianni, A.
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