气候变化领域集成服务门户(CCPortal): Coloured low-emissivity films for building envelopes for year-round energy savings

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DOI	10.1038/s41893-021-00836-x
	Coloured low-emissivity films for building envelopes for year-round energy savings
	Peng Y.; Fan L.; Jin W.; Ye Y.; Huang Z.; Zhai S.; Luo X.; Ma Y.; Tang J.; Zhou J.; Greenburg L.C.; Majumdar A.; Fan S.; Cui Y.
发表日期	2021
ISSN	2398-9629
英文摘要	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. © 2021, The Author(s), under exclusive licence to Springer Nature Limited.
语种	英语
scopus关键词	Apartment houses; Electromagnetic wave emission; Emission control; Energy conservation; Energy utilization; Reflection; Solar buildings; Sustainable development; Walls (structural partitions); Building envelopes; Building walls; Conditioning systems; Energy savings; Energy use; Energy-savings; Heating ventilation and air conditioning; Low emissivity films; Saving energy; Wavelength ranges; Air conditioning
来源期刊	Nature Sustainability
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/249848
作者单位	Department of Materials Science and Engineering, Stanford University, Stanford, CA, United States; E. L. Ginzton Laboratory, Department of Electrical Engineering, Stanford University, Stanford, CA, United States; Department of Mechanical Engineering, Stanford University, Stanford, CA, United States; Building Technology and Urban Systems Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United States; Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA, United States
推荐引用方式 GB/T 7714	Peng Y.,Fan L.,Jin W.,et al. Coloured low-emissivity films for building envelopes for year-round energy savings[J],2021.
APA	Peng Y..,Fan L..,Jin W..,Ye Y..,Huang Z..,...&Cui Y..(2021).Coloured low-emissivity films for building envelopes for year-round energy savings.Nature Sustainability.
MLA	Peng Y.,et al."Coloured low-emissivity films for building envelopes for year-round energy savings".Nature Sustainability (2021).