用于建筑围护结构的彩色低辐射率薄膜,全年节能

IF 25.7 1区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Nature Sustainability Pub Date : 2021-12-23 DOI:10.1038/s41893-021-00836-x
Yucan Peng, Lingling Fan, Weiliang Jin, Yusheng Ye, Zhuojun Huang, Shang Zhai, Xuan Luo, Yinxing Ma, Jing Tang, Jiawei Zhou, Louisa C. Greenburg, Arun Majumdar, Shanhui Fan, Yi Cui
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引用次数: 53

摘要

建筑物的能耗占美国总能耗的 40% 以上,其中约 40% 与供暖、通风和空调(HVAC)系统的运行直接相关。节约建筑物的供热和制冷能源将极大地促进可持续发展。在此,我们提出了一类彩色低辐射薄膜,用于构成建筑物热围护结构主要组成部分的建筑物墙壁。我们展示了所需颜色在红外线波长范围内的高反射率(约 90%)和在可见光波长范围内的选择性反射率。这些薄膜有助于最大限度地减少室内外环境之间的辐射热交换,从而在满足所需的美观效果的同时,节约全年制冷和供暖所需的能源。模拟结果表明,这些薄膜每年可帮助每个安装墙面面积减少高达 257.6 兆焦耳的热增益和热损失。以一栋典型的中层公寓楼为例,暖通空调系统可节省高达 124.46 千兆焦(相当于大楼暖通空调能耗的 9.87%)。据粗略估算,每年可实现全球二氧化碳减排 11.4 亿吨。我们的工作为创新节能建筑围护材料提供了启示,有助于实现全球碳中和与可持续发展。建筑外围护结构是建筑物与周围环境之间的界面,对能源效率和美观有很大影响。在此,作者介绍了一种彩色低辐射薄膜设计,它可以全年使用,以节约能源。
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Coloured low-emissivity films for building envelopes for year-round energy savings
Buildings are responsible for over 40% of total US energy use, of which about 40% is directly related to the operation of heating, ventilation and air-conditioning (HVAC) systems. Saving energy to heat and cool buildings would contribute substantially to sustainability. Here we propose a category of coloured low-emissivity films for building walls that constitute the main component of the building thermal envelope. We demonstrate high reflectance (~90%) in infrared wavelength range and selective reflectance in the visible light wavelength range for desired colours. These films can help minimize radiative heat exchange between the indoor and outdoor environments, thus saving energy for all-year cooling and heating while satisfying the required aesthetical effect. Simulations show that these films can help reduce heat gain and loss by up to 257.6 MJ per installation wall area annually. In the case of a typical midrise apartment building, the HVAC system can save up to 124.46 GJ (equal to 9.87% of the building’s HVAC energy consumption). By rough estimation, a global CO2 emission reduction of 1.14 billion metric tons annually could be achieved. Our work provides insights for innovative energy-saving building envelope materials that can help achieve global carbon neutrality and sustainability. The building envelope is the interface between a building and its surrounding environment, and has a substantial impact on energy efficiency and aesthetic appeal. Here the authors present a coloured low-emissivity film design that could work year-round to save energy.
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来源期刊
Nature Sustainability
Nature Sustainability Energy-Renewable Energy, Sustainability and the Environment
CiteScore
41.90
自引率
1.10%
发文量
159
期刊介绍: Nature Sustainability aims to facilitate cross-disciplinary dialogues and bring together research fields that contribute to understanding how we organize our lives in a finite world and the impacts of our actions. Nature Sustainability will not only publish fundamental research but also significant investigations into policies and solutions for ensuring human well-being now and in the future.Its ultimate goal is to address the greatest challenges of our time.
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