Realization of an Adaptive Radiative Cooler with a Multilayer-Filter VO_(2)-Based Fabry-Pérot Cavity  

作　　者：谢恒立 殷怀远 范春珍 Hengli Xie;Huaiyuan Yin;Chunzhen Fan(School of Physics and Laboratory of Zhongyuan Light,Zhengzhou University,Zhengzhou 450001,China)

机构地区：[1]School of Physics and Laboratory of Zhongyuan Light,Zhengzhou University,Zhengzhou 450001,China

出　　处：《Chinese Physics Letters》2024年第4期38-44,共7页中国物理快报（英文版）

基　　金：supported by the Natural Science Foundation of Henan Province(Grant No.232102231023)。

摘　　要：A high-performance adaptive radiative cooler comprising a multilayer-filter VO_(2)-based Fabry-Pérot(FP)cavity is proposed.The bottom FP cavity has four layers,VO_(2)/NaCl/PVC/Ag.Based on the phase transition of VO_(2),the average emissivity in the transparent window can be switched from 3.7%to 96.3%.Additionally,the average emissivity can also be adjusted with external strain to the PVC layer,providing another way to attain the desired cooling effect.An upper filter is included to block most of the solar radiation and provide a transmittance of 96.7% in the atmospheric window.At high temperature,the adaptive emitter automatically activates radiative cooling.The net cooling power is up to 156.4 W·m^(-2)at an ambient temperature of 303 K.Our adaptive emitter still exhibits stable selective emissivity at different incident angles and heat transfer coefficients.At low temperature,the radiative cooling automatically deactivates,and the average emissivity decreases to only 3.8%.Therefore,our work not only provides new insights into the design of high-performance adaptive radiative coolers but also advances the development of intelligent thermal management.

关 键 词：EMISSIVITY CAVITY SWITCHED 

分 类 号：TB657[一般工业技术—制冷工程] TN713[电子电信—电路与系统]