Li Yang, Lin Chongjia, Huang Jingyuan, Chi Cheng, Huang Baoling
Department of Mechanical and Aerospace Engineering The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong SAR 999077 China.
The Hong Kong University of Science and Technology Foshan Research Institute for Smart Manufacturing Clear Water Bay Kowloon Hong Kong SAR 999077 China.
Glob Chall. 2020 Oct 20;5(1):2000058. doi: 10.1002/gch2.202000058. eCollection 2021 Jan.
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.
在过去几十年里，从太阳和外层空间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，所获取的可再生能源还惠及了另一项全球挑战——水资源短缺。太阳能蒸汽发生和基于被动辐射冷却的大气水收集都是很有前景的技术，它们以绿色且可持续的方式生产淡水。光谱控制对于在基于特定波长范围内吸收/发射光的两个互补系统中实现高效率至关重要。因此，已经开发出了各种各样具有优异光谱选择性的太阳能吸收器和红外发射器。尽管太阳能选择性吸收器和红外选择性发射器在不同的光谱区域工作，但它们具有相似的设计策略。在这个阶段，回顾它们的进展并找出它们共同的光学特性是紧迫且必要的。在此，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，来确定选择性吸收器/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。
