用于辐射冷却应用的双层结构涂层

IF 1.5 4区工程技术 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Photonics for Energy Pub Date : 2021-10-01 DOI:10.1117/1.JPE.11.042109

Rongbing Wan, Zhihao Ma, Weiping Xu, Wenbo Zhao, Jingtao Xu, Ronggui Yang

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引用次数: 0

摘要

摘要日间辐射冷却技术可以在阳光直射下将物体冷却到低于环境温度，而无需能耗。该技术依赖于太阳辐射的高反射率和大气窗口的高发射率（波长为8-13μm的红外发射）。我们报道了一种用于被动日间亚环境辐射冷却的双层结构涂层。双层辐射冷却涂层在大气窗口中具有高太阳反射率（0.94）和高红外发射率（0.96）。双层涂层在990的太阳辐照度下达到3.6°C的亚环境温度 W / m2，环境温度为26.6°C，平均亚环境冷却温度为~8 ° C在晚上。对两个模型室的测试表明，双层涂层和普通白色涂层的室内空气温度之间的最大差值为9.7°C。

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Bilayer structured coating for radiative cooling applications

Abstract. Daytime radiative cooling technology can cool objects to sub-ambient temperatures under direct sunlight without energy consumption. The technology relies on high reflectance of solar irradiation and high emissivity in the atmospheric window (infrared emission with 8 to 13 μm wavelengths). We report a bilayer structured coating for passive daytime sub-ambient radiative cooling. The bilayer radiative cooling coating has high solar reflectance (0.94), and high infrared emissivity (0.96) in the atmospheric window. The bilayer coating achieved a sub-ambient temperature of 3.6°C under solar irradiance of 990 W / m2 at an ambient temperature of 26.6°C, and the averaged sub-ambient cooling temperature of ∼8 ° C during the night. A test with two model rooms shows that the indoor air temperature reached a maximum difference of 9.7°C between the one with the bilayer coating and that with normal white coating.

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来源期刊

Journal of Photonics for Energy MATERIALS SCIENCE, MULTIDISCIPLINARY-OPTICS

CiteScore

3.20

自引率

5.90%

发文量

审稿时长

>12 weeks

期刊介绍： The Journal of Photonics for Energy publishes peer-reviewed papers covering fundamental and applied research areas focused on the applications of photonics for renewable energy harvesting, conversion, storage, distribution, monitoring, consumption, and efficient usage.