Abstract Daytime radiative cooling under sunlight can be achieved by embedding micro-sized objects into a binder. In the present article, by carrying out a numerical study of daytime radiative cooling material design using statistical Monte Carlo method, we demonstrate that a silica (SiO2) fiber network can efficiently reflect sunlight via backscattering and efficiently emit infrared thermal radiation. Using a fiber network removes the necessity of the presence of a binder, thus unlike spheres, fibers can be suspended in air. As a consequence, fibers can scatter sunlight efficiently due to the high refractive index difference between air and silica, and efficiently emit thermal radiation due to mitigation of internal reflection losses that arise at the binder air interface. As a result, we show that such a silica fiber network can achieve a net radiative cooling power of 178 W m−2.

中文翻译：

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使用二氧化硅光纤网络进行日间辐射冷却

摘要 白天在阳光下的辐射冷却可以通过将微型物体嵌入粘合剂中来实现。在本文中，通过使用统计蒙特卡罗方法对白天辐射冷却材料设计进行数值研究，我们证明了二氧化硅 (SiO2) 纤维网络可以通过背向散射有效地反射阳光并有效地发射红外热辐射。使用纤维网络消除了粘合剂存在的必要性，因此与球体不同，纤维可以悬浮在空气中。因此，由于空气和二氧化硅之间的高折射率差异，纤维可以有效地散射太阳光，并且由于减少了粘合剂空气界面处出现的内部反射损失，因此可以有效地发射热辐射。因此，