UV Pre-Management Strengthens the Daytime Radiative Cooling under Direct SunlightOA
Radiative cooling is a passive,energy-free technology that is crucial for energy conservation and mitigating the greenhouse effect Silver(Ag)is most commonly selected as the metallic reflector layer for radiative cooling due to its high reflectivity across the solar spectrum.However,the high absorptivity of metallic silver in the ultraviolet(UV)spectrum severely limits cooling efficiency.To address this challenge,this study focuses on enhancing the cooling performance of passive daytime radiative cooling(PDRC)technology by developing a novel UV-management wind cover for PDMS/Ag radiative coolers.Its optical properties are measured across the solar spectrum and atmospheric window bands.Theoretical analysis reveals that UV pretreatment reduces solar radiation absorption by 25%and atmospheric radiation absorption by 10%in the radiative cooler.Experimental results demonstrate that under high-altitude environment with intense ultraviolet radiation,the temperature of the UV-pretreated radiative cooler is 5.1℃lower than that of the untreated cooler.This approach enables lower daytime radiative cooling temperatures in regions with high ultraviolet radiation.
LI Ziyan;WU Yongjia;SHI Chuanjie;DING Xinyuan;CHEN Qiong;WANG Caixia;DING Yan;MING Tingzhen
Sanya Science and Education Innovation Park,Wuhan University of Technology,Sanya 572004,China School of Civil Engineering and Architecture,Wuhan University of Technology,Wuhan 430070,ChinaSanya Science and Education Innovation Park,Wuhan University of Technology,Sanya 572004,China School of Civil Engineering and Architecture,Wuhan University of Technology,Wuhan 430070,ChinaSchool of Civil Engineering and Architecture,Wuhan University of Technology,Wuhan 430070,ChinaSchool of Civil Engineering and Architecture,Wuhan University of Technology,Wuhan 430070,ChinaSchool of Civil Engineering and Architecture,Wuhan University of Technology,Wuhan 430070,ChinaSchool of Civil Engineering and Architecture,Wuhan University of Technology,Wuhan 430070,ChinaEngineering Department,China University of Geosciences,Wuhan 430074,ChinaSanya Science and Education Innovation Park,Wuhan University of Technology,Sanya 572004,China School of Civil Engineering and Architecture,Wuhan University of Technology,Wuhan 430070,China
通用工业技术
daytime radiative coolingUV pre-managementsolar radiationultraviolet spectrum
《Journal of Thermal Science》 2026 (4)
P.1571-1582,12
supported by the National Natural Science Foundation of China(Grant Nos.52208124 and 52308112)。
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