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Subambient Cooling of Water: Toward Real-World Applications of Daytime Radiative Cooling
Joule ( IF 38.6 ) Pub Date : 2018-10-26 , DOI: 10.1016/j.joule.2018.10.006
Dongliang Zhao , Ablimit Aili , Yao Zhai , Jiatao Lu , Dillon Kidd , Gang Tan , Xiaobo Yin , Ronggui Yang

Real-world applications of radiative sky cooling require thoughtful design of the system, along with clear understanding of weather effects on system performance. This work explores application of radiative sky cooling based upon a low-cost radiative cooling metamaterial that can be scalably manufactured. A radiative cooled-cold collection (RadiCold) module is developed to cool water to 10.6°C below ambient at noon under stationary conditions. The effects of different weather conditions (wind speed, precipitable water, and cloud cover) on the performance of radiative cooling have been investigated. A kilowatt (kW)-scale RadiCold system with 13.5 m2 radiative cooling surface area is then built and demonstrated to provide a maximum cooling power of 1,296 W at night, and an average cooling power of 607 W at noon (12–2 p.m.) under 952 W/m2 average solar irradiance at 26.5 L/(h⋅m2) volumetric flow rate. A building-integrated RadiCold system is proposed to provide continuous day-and-night cooling.



中文翻译:

水的环境冷却:朝着白天辐射冷却的实际应用迈进

辐射天空冷却的实际应用需要对系统进行周密的设计,同时还要清楚了解天气对系统性能的影响。这项工作探索了可低成本制造的基于低成本辐射冷却超材料的辐射天空冷却的应用。开发了一种辐射式冷-冷收集(RadiCold)模块,可在固定条件下在中午将水冷却到环境温度以下的10.6°C。研究了不同天气条件(风速,可降水量和云量)对辐射冷却性能的影响。具有13.5 m 2的千瓦(kW)规模的RadiCold系统然后构建辐射冷却表面积,并证明其在夜间的最大冷却功率为1,296 W,在952 W / m 2的平均太阳辐照度为26.5 L /时,正午(12–2 pm)的平均冷却功率为607W。(h⋅m 2)体积流量。提议将建筑物集成的RadiCold系统提供昼夜连续的冷却。

更新日期:2018-10-26
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