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 ra...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 technologyfrom 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 toradiate its own heat out thus being cooled down;meanwhile maintains the temperature difference by the heat insulation effect ofthe porous structure in theflm.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.展开更多
基金Financial support from the Ministry of Science and Technology,China(grant No.ZK20210004)the Department of Science and Technology of Shandong Province,China(grant No.ZK20200026)the National Natural Science Foundation of China(grant No.52176175),are gratefully acknowledged.
文摘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 technologyfrom 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 toradiate its own heat out thus being cooled down;meanwhile maintains the temperature difference by the heat insulation effect ofthe porous structure in theflm.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.
