Highly effective photon-to-cooling thermal device
Highly effective photon-to-cooling thermal device
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DOI：
10.1038/s41598-019-55546-4
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发表时间：
2019-12-17
影响因子：
4.6
通讯作者：
Zheng, Yi
中科院分区：
文献类型：
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作者：
Tian, Yanpei;Qian, Lijuan;Zheng, Yi
光子制冷现象依靠大气透明窗口将地球热量散发到外太空，是一种节能制冷技术。这项工作展示了一种高效的镀铝聚甲基戊烯（PMP）薄膜热结构。镀铝PMP薄膜的发射率与大气透明窗口很好地匹配，从而最大限度地减少寄生热损失。与环境温度相比，这种光子冷却结构在一天的循环中产生 8.5 K 的温降和 193 W/m2 的相应辐射冷却功率。镀铝 PMP 薄膜易于制造的特点使其成为一种实用的可扩展的辐射冷却方法。
Photon-to-cooling phenomenon relies on the atmospheric transparency window to dissipate heat from the earth into outer space, which is an energy-saving cooling technique. This work demonstrates a highly effective aluminized Polymethylpentene (PMP) thin-film thermal structure. The emissivity of aluminized PMP thin films matches well to the atmospheric transparency window so as to minimize parasitic heat losses. This photon-to-cooling structure yields a temperature drop of 8.5 K in comparison to the ambient temperature and a corresponding radiative cooling power of 193 W/m2 during a one-day cycle. The easy-to-manufacture feature of an aluminized PMP thin film makes it a practically scalable radiative cooling method.