发射率
反照率(炼金术)
辐射冷却
辐射传输
制作
环境科学
天空
热的
被动冷却
热舒适性
低发射率
材料科学
遥感
气象学
光学
物理
地质学
医学
艺术
替代医学
病理
表演艺术
艺术史
作者
Jiachen Li,Kaichen Dong,Tiancheng Zhang,Derick Tseng,Cheng Fang,Ruihan Guo,Jingang Li,Yujie Xu,Chaochao Dun,Jeffrey J. Urban,Tianzhen Hong,Costas P. Grigoropoulos,Ali Javey,Jie Yao,Junqiao Wu
出处
期刊:Joule
[Elsevier]
日期:2023-10-20
卷期号:7 (11): 2552-2567
被引量:15
标识
DOI:10.1016/j.joule.2023.09.011
摘要
Radiative cooling uses high-emissivity materials to passively cool the surface of outdoor objects, such as building roofs on hot days. The issue of overcooling with this technology on cold days can be addressed by structures with thermal emissivity that is adaptive to temperature. Despite recent advances in temperature-adaptive structures, great challenges remain in their fabrication feasibility and unoptimized solar heating that may override the radiative cooling benefit. In this work, we develop a printable, emissivity-adaptive and albedo-optimized covering (PEAC) based on recyclable materials with roll-to-roll fabrication. A PEAC automatically switches its sky-window emissivity from 0.25 to 0.85 when the surface temperature exceeds a pre-set transition temperature, delivering an albedo optimized for maximal year-round energy saving or thermal comfort in a given climate.
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