利用微结构剪裁表面的辐射冷却
Radiative cooling by tailoring surfaces with microstructures
摘要：
在这篇文章中，我们提出了一种方法来产生辐射冷却器，这是反射在太阳光谱和发射的大气透明窗口（8-13 $μ$ m）。我们选择了结合光栅和多层膜的热控制能力的方法。我们使用了优化的BN、SiC和SiO2光栅，它们在透明窗口有发射率峰值.我们在这些光栅下放置金属/电介质多层结构，以获得在太阳光谱中近乎完美的反射率，并提高透明窗口中的发射率。优化结构产生良好的辐射冷却功率密度高达80 W.m -2。
英文摘要：
We propose in this article a method to generate radiative coolers which are reflective in the solar spectrum and emissive in the transparency window of the atmosphere (8-13 $μ$m). We choose an approach combining thermal control capacity of gratings and multi-layers. We use optimized BN, SiC and SiO 2 gratings, which have emissivity peak in the transparency window. We place under these gratings a metal/dielectric multi-layer structure to obtain a near perfect reflectivity in the solar spectrum and to enhance the emissivity in the transparency window. The optimized structures produce a good radiative cooling power density up to 80 W.m --2 .
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