Energy and visual performance of the silica aerogel glazing system in commercial buildings of Hong Kong
Energy and visual performance of the silica aerogel glazing system in commercial buildings of Hong Kong
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DOI：
10.1016/j.conbuildmat.2015.06.053
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发表时间：
2015-09-30
影响因子：
7.4
通讯作者：
Niu, Jian-lei
中科院分区：
文献类型：
--
作者：
Huang, Yu;Niu, Jian-lei
如何在保持较低能耗水平的同时实现更舒适的室内环境，对建筑设计者和业主来说是一个令人兴奋的挑战。本文提出了一种二氧化硅-气凝胶填充超隔热玻璃体系。对所提出的玻璃系统的能量性能和视觉性能进行了数值研究。数值研究中使用了两个流行的建筑模拟程序EnergyPlus和Radiance。在能量性能研究中，采用了三种控制策略(空间温度控制、运行温度控制和PMV控制)来模拟现实中乘员对空调系统的控制行为。结果表明，与传统的单一透明玻璃相比，二氧化硅气凝胶玻璃的热舒适期延长了4%，暖通空调系统的能耗降低了4%~7%。二氧化硅气凝胶玻璃的性能几乎与最先进的Low-E玻璃相当。并得出结论：随着乘员对热舒适性要求的提高，二氧化硅气凝胶玻璃的性能也会越来越好。从视觉舒适性的角度来看，在室内照明水平满足要求的情况下，可以显著降低眩光效应和近窗亮区。(C)2015爱思唯尔有限公司。保留所有权利。
To achieve a more comfortable indoor environment while still retaining low energy consumption level is an exciting challenge for designers and owners of buildings. In this paper, a silica-aerogel filled super-insulating glazing system was proposed. A numerical study was conducted to analyze the energy performance and visual performance of the proposed glazing system. Two popular building simulation programs namely EnergyPlus and Radiance were applied in the numerical study. In the study of the energy performance, three control strategies (space temperature control, operative temperature control and PMV control) were applied to simulate the occupant's control behavior toward the air-conditioning system in reality. The result indicated that compared with conventional single clear glazing, the silica aerogel glazing could retain a 4% longer thermally comfort period, while the energy consumption of HVAC system was reduced by 4-7%. The performance of the silica aerogel glazing was almost equal to that of the state-of-art low-e glazing. It is also concluded that as the occupant's request on thermal comfort got stricter, the performance of the silica aerogel glazing would became better. In the visual comfort point of view, it can be concluded that the glare effect and near-window bright zone could be reduced significantly while indoor illumination level still met the requirement. (C) 2015 Elsevier Ltd. All rights reserved.