阳光
辐射冷却
辐射传输
热的
黑体辐射
可再生能源
热辐射
物理
光电子学
太阳增益
太阳能
吸收(声学)
光学
天体生物学
辐射
天体物理学
气象学
工程类
热力学
电气工程
作者
Linxiao Zhu,Aaswath P. Raman,Shanhui Fan
标识
DOI:10.1073/pnas.1509453112
摘要
Significance The coldness of the universe is an enormous but strikingly underexploited thermodynamic resource. Its direct utilization on Earth therefore represents an important frontier for renewable energy research. In many applications, including solar cells and outdoor structures, the absorption of sunlight is intrinsic either from operational or aesthetic considerations, but the resulting heating by sunlight is undesirable. Here we experimentally demonstrate a thermal photonic scheme that can cool these structures by thermal radiation to outer space, while preserving the structures’ solar absorption. Our work shows, for the first time to our knowledge, that radiative cooling can be used in combination with the utilization of sunlight, and opens new possibilities for using the coldness of the universe to improve the performance of terrestrial energy systems.
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