论文标题
全白天的亚镜子辐射冷却，具有高功绩，类似商业的油漆
Full Daytime Sub-ambient Radiative Cooling with High Figure of Merit in Commercial-like Paints
论文作者
论文摘要
辐射冷却是一种通过反射阳光并在大气中发出辐射的被动冷却技术。尽管高度期望，但在类似商业的单层粒子垫片中，全白天的亚镜子辐射冷却尚未实现。在这项工作中，我们通过采用大型带隙填充剂，高颗粒浓度和宽尺寸的分布来证明Caco3-丙烯酸涂料中的全天次级辐射冷却。我们的油漆在油漆中显示出95.5％的太阳反射率，高空窗口发射率为0.94。现场测试显示，冷却功率超过37 W/m2，较低的表面温度在中午比环境低于1.7℃。提出了一个功绩RC的数字，以比较不同天气条件下的冷却性能。我们的冷却涂料的RC为0.62，是最好的辐射冷却性能之一，同时提供了方便的油漆形式，低成本以及与商业油漆制造工艺的兼容性的前所未有的好处。
Radiative cooling is a passive cooling technology by reflecting sunlight and emitting radiation in the atmospheric sky window. Although highly desired, full daytime sub-ambient radiative cooling in commercial-like single-layer particle-matrix paints is yet to be achieved. In this work, we have demonstrated full daytime sub-ambient radiative cooling in CaCO3-acrylic paint by adopting large bandgap fillers, a high particle concentration and a broad size distribution. Our paint shows the highest solar reflectance of 95.5% among paints and a high sky-window emissivity of 0.94. Field tests show cooling power exceeding 37 W/m2 and lower surface temperature more than 1.7C below ambient at noon. A figure of merit RC is proposed to compare the cooling performance under different weather conditions. The RC of our cooling paint is 0.62, among the best radiative cooling performance while offering unprecedented benefits of the convenient paint form, low cost, and the compatibility with commercial paint fabrication process.
