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首页> 外文期刊>Solar Energy Materials and Solar Cells: An International Journal Devoted to Photovoltaic, Photothermal, and Photochemical Solar Energy Conversion >Low-cost radiative cooling blade coating with ultrahigh visible light transmittance and emission within an 'atmospheric window'
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Low-cost radiative cooling blade coating with ultrahigh visible light transmittance and emission within an 'atmospheric window'

机译：低成本辐射冷却刀片涂层，具有超高可见光透射率和“大气窗口”中的排放

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摘要

Radiative cooling is a passive means of cooling that does not require the consumption of additional energy and has broad application potential. While experimental spectral measurements have been conducted, the daylighting of buildings, photovoltaic (PV) cells, and vehicles has seldom been considered. Here, we use spectrum-selective coatings to resolve the competing demands of daylighting (or appearance) and radiative cooling. A simple liquid blade-coating method that was inexpensive, convenient, and scalable was used to achieve radiative cooling with ultrahigh transmittance in visible light and excellent cooling performance. Resonant polar dielectric SiO2 microparticles with optimized volumetric fractions and diameters were randomly mixed into an acrylic resin and manually bladed at room temperature with natural evaporation drying. Spectrometry results showed that a mean visible light transmittance >91.3% was achieved, which was much higher than reported in previous studies; a mean emittance >93.7% within the "atmospheric window" was also reached. Over four days testing of a silver-plated aluminum sheet in a populous area at sea level, we achieved a maximum sub-ambient decrease in temperature of similar to 8.7 degrees C and a maximum cooling power of 108.49 W/m(2).
机译：辐射冷却是一种无源冷却手段，不需要额外的能量消耗并且具有广泛的应用势。虽然已经进行了实验光谱测量，但建筑物的日光，光伏（PV）电池和车辆很少被考虑。在这里，我们使用光谱 - 选择性涂层来解决日光（或外观）和辐射冷却的竞争需求。一种简单的液体刀片涂布方法，可廉价，方便，可伸缩，以在可见光和优异的冷却性能下实现具有超高透射率的辐射冷却。具有优化的体积分馏和直径的共振极性介电SiO 2微粒被随机混合到丙烯酸树脂中并在室温下手动蒸发干燥。光谱结果表明，实现了平均可见光透射率> 91.3％，高于先前研究中报道的高于报道;也达到了平均发射> 93.7％“大气窗口”。在海平面的镀银铝板上进行了四天的测试，我们实现了最大的亚环境温度，类似于8.7摄氏度，最大冷却功率为108.49w / m（2）。

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