论文标题
分级的纳米复合材料超材料，用于双面辐射冷却结构，并具有创纪录的冷却功率密度
Graded nanocomposite metamaterials for a double-sided radiative cooling architecture with a record breaking cooling power density
论文作者
论文摘要
作为新兴的无电冷却技术，辐射冷却作为散热器的外太空。这样，通常需要面向天空的热发射极。由于在环境温度下的黑体辐射极限，因此单面辐射冷却装置的最大冷却功率密度为〜156.9 W/m2。在这里，我们报告使用专为垂直排列的热发射器设计的分级纳米复合材料（GNM）的双面辐射冷却结构。在整个太阳光谱中，这种GNM结构具有超过90％的光吸收，并且在中红外光谱区域超过90％的反射。通过这种配置，可以使用平面热发射极的两侧进行辐射冷却，并且在单个薄膜热发射器中实现了创纪录的冷却功率密度超过280 W/m2。在标准压力下，我们意识到，在实验室环境中，在环境环境中的环境温度以下，在室外测试中降低了12摄氏度的温度。
As an emerging electricity-free cooling technology, radiative cooling employs outer space as the heat sink. With this, a sky-facing thermal emitter is usually required. Due to the black-body radiation limit at ambient temperature, the maximum cooling power density for a single-faced radiative cooling device is ~156.9 W/m2. Here we report a double-sided radiative cooling architecture using graded nanocomposite metamaterials (GNM) designed for a vertically aligned thermal emitter. This GNM structure possesses an optical absorption of over 90% throughout the solar spectrum, and exceeds 90% reflection in the mid-infrared spectral region. With this configuration, both sides of a planar thermal emitter can be used to perform radiative cooling and a record cooling power density beyond 280 W/m2 was realized in a single thin-film thermal emitter. Under the standard pressure, we realized a temperature reduction of 14 degree Celsius below the ambient temperature in the laboratory environment, and over 12 degree Celsius in the outdoor test.
