Spectrally Selective Absorbers/Emitters for Solar Steam Generation and Radiative Cooling‐Enabled Atmospheric Water Harvesting,Global Challenges

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Spectrally Selective Absorbers/Emitters for Solar Steam Generation and Radiative Cooling‐Enabled Atmospheric Water Harvesting
Global Challenges ( IF 4.4 ) Pub Date : 2020-10-20 , DOI: 10.1002/gch2.202000058
Yang Li ₁ , Chongjia Lin ₁ , Jingyuan Huang ₁ , Cheng Chi ₁ , Baoling Huang _{1,

2}

Affiliation

Renewable energy harvesting from the sun and outer space have aroused significant interest over the past decades due to their great potential in addressing the energy crisis. Furthermore, the harvested renewable energy has benefited another global challenge, water scarcity. Both solar steam generation and passive radiative cooling‐enabled atmospheric water harvesting are promising technologies that produce freshwater in green and sustainable ways. Spectral control is extremely important to achieve high efficiency in the two complementary systems based on absorbing/emitting light in a specific wavelength range. For this reason, a broad variety of solar absorbers and IR emitters with great spectral selectivity have been developed. Although operating in different spectral regions, solar selective absorbers and IR selective emitters share similar design strategies. At this stage, it is urgent and necessary to review their progress and figure out their common optical characteristics. Herein, the fundamental mechanisms and recent progress in solar selective absorbers and IR selective emitters are summarized, and their applications in water production are reported. This review aims to identify the importance of selective absorbers/emitters and inspire more research works on selective absorbers/emitters through the summary of advances and the establishment of the connection between solar absorbers and IR emitters.

中文翻译：

用于太阳能蒸汽发生和辐射冷却的大气水收集的光谱选择性吸收器/发射器

过去几十年来，从太阳和外太空获取可再生能源因其在解决能源危机方面的巨大潜力而引起了人们的极大兴趣。此外，收获的可再生能源还有助于解决另一个全球性挑战：水资源短缺。太阳能蒸汽发电和被动辐射冷却大气水收集都是有前景的技术，可以以绿色和可持续的方式生产淡水。光谱控制对于在基于吸收/发射特定波长范围内的光的两个互补系统中实现高效率极其重要。因此，人们开发出了多种具有良好光谱选择性的太阳能吸收器和红外发射器。尽管在不同的光谱区域工作，太阳能选择性吸收器和红外选择性发射器具有相似的设计策略。现阶段，迫切且有必要回顾它们的进展并找出它们共同的光学特性。本文总结了太阳能选择性吸收器和红外选择性发射器的基本机制和最新进展，并报道了它们在水生产中的应用。本综述旨在通过总结进展以及建立太阳能吸收器和红外发射器之间的联系，确定选择性吸收器/发射器的重要性，并激发更多关于选择性吸收器/发射器的研究工作。

更新日期：2020-10-20

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