透明的元膜,用于增强节能窗户的热调节

IF 6.6 2区 物理与天体物理 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Biyuan Wu, Yue Ren, Xiqiao Huang, Meijie Chen, Yong Li, Jiangtao Li, Yang Kou, Xiaohu Wu
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引用次数: 0

摘要

具有光谱选择性的透明元膜在节能窗系统中显示出巨大的潜力。以往的研究大多集中在优化材料和厚度上,以提高可见光透过率和近红外反射率。然而,很少有人考虑到玻璃上元膜的位置如何影响整体光学和热性能,特别是在辐射冷却的关键中红外(MIR)范围内。在这项工作中,我们提出并分析了五层TiO2/Ag/TiO2/Ag/TiO2结构,并系统评估了其在两种典型安装场景下的性能。基于传递矩阵方法的数值模拟表明,这两种配置都保持了较高的可见光透过率(~ 0.88)和有效的近红外反射率(~ 0.98)。值得注意的是,在8-14 μm的大气透明窗口内观察到明显的差异,其中内涂层结构具有0.8的高发射率。这个值大大超过了外涂层结构的平均发射率0.01,从而产生了优越的被动辐射冷却能力。此外,我们还比较了两种配置下的净辐射冷却功率。这些发现表明透明元膜的位置对MIR辐射有重要影响。在内表面放置涂层不仅保持了良好的太阳调制,而且显著提高了散热。本研究为节能窗系统中元膜的设计和实施提供了理论指导和实践见解,旨在降低能源消耗,特别是在炎热气候地区。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Transparent metafilms for enhanced thermal regulation in energy-efficient windows
Transparent metafilms with spectrally selective properties have shown great potential in energy-efficient window systems. Most previous studies focused on optimizing materials and thicknesses to enhance visible transmittance and near-infrared (NIR) reflectance. However, few have considered how the position of the metafilms on the glass affects overall optical and thermal performance, especially in the mid-infrared (MIR) range critical for radiative cooling. In this work, we propose and analyze a five-layer TiO2/Ag/TiO2/Ag/TiO2 structure and systematically evaluate its performance under two typical installation scenarios. Numerical simulations based on the transfer matrix method show that both configurations maintain a high visible transmittance (∼0.88) and an effective NIR reflectance (∼0.98). Notably, a substantial difference is observed within the atmospheric transparency window 8–14 μm, where the interior-coated configuration possesses a high emissivity of 0.8. This value significantly exceeds the average emissivity of 0.01 found for the exterior-coated configuration, thereby resulting in superior passive radiative cooling capability. Moreover, we also compared the net radiative cooling power under the two configurations. These findings reveal that the position of the transparent metafilms critically influences MIR radiation. Coating placement on the interior surface not only maintains favorable solar modulation but also markedly enhances the thermal dissipation. This study offers theoretical guidance and practical insight into the design and implementation of metafilms in energy saving window systems aimed at reducing energy consumption, especially in regions with hot climates.
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来源期刊
Nanophotonics
Nanophotonics NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY
CiteScore
13.50
自引率
6.70%
发文量
358
审稿时长
7 weeks
期刊介绍: Nanophotonics, published in collaboration with Sciencewise, is a prestigious journal that showcases recent international research results, notable advancements in the field, and innovative applications. It is regarded as one of the leading publications in the realm of nanophotonics and encompasses a range of article types including research articles, selectively invited reviews, letters, and perspectives. The journal specifically delves into the study of photon interaction with nano-structures, such as carbon nano-tubes, nano metal particles, nano crystals, semiconductor nano dots, photonic crystals, tissue, and DNA. It offers comprehensive coverage of the most up-to-date discoveries, making it an essential resource for physicists, engineers, and material scientists.
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