Yingying Yin, Pengcheng Sun, Yijun Zeng, Meng Yang, Shouwei Gao, Steven Wang, Zhengyong Huang, Yingfan Zhang, Yang Wang, Zuankai Wang
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引用次数: 0
摘要
在建筑物中实现全年节能对于实现碳中和与可持续发展具有重要意义。可切换热管理材料为动态调节建筑物内部温度提供了一种无能耗的解决方案,它在夏季被动地向寒冷的外部空间散发热量,在冬季从炎热的阳光中吸收热量。除了动态热调节外,色彩显示也是解决美学问题的另一种追求;然而,由于自适应太阳反射和选择性可见光吸收之间存在光学冲突,目前大多数动态可切换材料都缺乏色彩选择,这限制了它们在商业外墙等美学场景中的广泛应用。本文报告了一种彩色温度自适应斗篷(CTAC),它能以能源中性的方式实现动态可切换热管理,同时不影响全年鲜艳的色彩显示。通过选择热致变色微胶囊和荧光染料这两种独立的组成成分,实现了太阳能反射率调节和色彩显示的解耦。此外,与具有相似颜色的单模式样品相比,具有双模式的 CTAC 在寒冷的冬季可保持 5.6-3.4°C 的温度,在炎热的夏季可保持 14.9-7.9°C 的温度(峰值太阳辐照度分别为:≈735 W m-2 和 1030 W m-2),在实现全年建筑节能方面具有显著的潜力。
A Colored Temperature-Adaptive Cloak for Year-Round Building Energy Saving
Achieving year-round energy savings in buildings holds great significance toward reaching carbon neutrality and sustainability. Switchable thermal-management materials offer an energy-free solution to dynamically regulating internal building temperatures, by passively emitting heat into cold outer space in summer, and absorbing heat from hot sunlight in winter. In addition to dynamic thermal regulation, color display is another pursuit for addressing aesthetic considerations; however, most current dynamically switchable materials lack color options, due to an optical conflict between adaptive solar reflection and selective visible absorption, limiting their wide adoption in aesthetic scenarios such as commercial exterior walls. Herein, a colored temperature-adaptive cloak (CTAC) that achieves dynamically switchable thermal management in an energy-neutral way without sacrificing year-round vibrant color display is reported. This is realized by decoupling solar reflectivity modulation and color display through the choice of two individual constituent components, including thermochromic microcapsules, and fluorescent dyes. Moreover, compared to single-mode samples with similar colors, the CTAC with dual modes stays 5.6–3.4 °C warmer during cold winter and 14.9–7.9 °C cooler during hot summer (peak solar irradiance: ≈735 and 1030 W m−2, respectively), exhibiting a remarkable potential to achieve year-round building energy savings.
期刊介绍:
Established in 2011, Advanced Energy Materials is an international, interdisciplinary, English-language journal that focuses on materials used in energy harvesting, conversion, and storage. It is regarded as a top-quality journal alongside Advanced Materials, Advanced Functional Materials, and Small.
With a 2022 Impact Factor of 27.8, Advanced Energy Materials is considered a prime source for the best energy-related research. The journal covers a wide range of topics in energy-related research, including organic and inorganic photovoltaics, batteries and supercapacitors, fuel cells, hydrogen generation and storage, thermoelectrics, water splitting and photocatalysis, solar fuels and thermosolar power, magnetocalorics, and piezoelectronics.
The readership of Advanced Energy Materials includes materials scientists, chemists, physicists, and engineers in both academia and industry. The journal is indexed in various databases and collections, such as Advanced Technologies & Aerospace Database, FIZ Karlsruhe, INSPEC (IET), Science Citation Index Expanded, Technology Collection, and Web of Science, among others.