Progress of passive daytime radiative cooling technologies towards commercial applications--颗粒学报PARTICUOLOGY

Cui, Y., Luo, X., Zhang, F., Sun, L., Jin, N., & Yang, W. (2022). Progress of passive daytime radiative cooling technologies towards commercial applications. Particuology, 67, 57-67. https://doi.org/10.1016/j.partic.2021.10.004

Progress of passive daytime radiative cooling technologies towards commercial applications

Yan Cui, Xianyu Luo, Fenghua Zhang ^*, Le Sun, Nuo Jin, Weimin Yang

College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029, China

10.1016/j.partic.2021.10.004

Volume 67, August 2022, Pages 57-67

Received 9 July 2021, Revised 28 September 2021, Accepted 4 October 2021, Available online 2 November 2021, Version of Record 2 December 2021.

E-mail: zhangfenghua@mail.buct.edu.cn

Highlights

• Basic principles and typical structures of radiation cooling are summarized.

• The performance of different radiative coolers is evaluated.

• The importance of heat insulation function of the cooler is strengthened.

• The advantages of porous structures are highlighted.

• Challenges and solutions for commercialization of radiation cooling are proposed.

Abstract

Global warming has become one of the major environmental problems facing mankind in the 21st century. The existing refrigeration technology of buildings, like air conditioning, consumes a lot of energy. Passive daytime radiative cooling technology works without consuming energy, nor emitting carbon dioxide and other greenhouse gases. This review summarizes the development of daytime passive radiative cooling technology from the basic principles, structure and materials of radiative coolers; analyses and evaluates the various existing radiative coolers. The core of radiative cooling lies in the combination of multi-scale micro/nano structures. The cooler reflects sunlight thus preventing the building from being heated up; while allows the building to radiate its own heat out thus being cooled down; meanwhile maintains the temperature difference by the heat insulation effect of the porous structure in the film. The common challenges and potential solutions for the commercialization of radiative cooling technologies are analyzed, which may promote the applications of the technology in the near future.

Graphical abstract

Keywords

Passive daytime radiative cooling; Micro/nano particles; Porous structure; Micro/nano structures

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