2020/05/29 by Kou, Rui, Zhong, Ying, Wang, Qingyang +3
#Applied Physics (physics.app-ph) #FOS: Physical sciences
paper · doi:10.48550/arxiv.2005.14395
Polymer-air multilayer (PAM) was developed to decrease the heat loss through window glass panes. A PAM consists of a few polymer films separated from each other by air gaps. Thanks to the excellent optical properties of the polymer films, the visual transmittance of PAM is higher than 70%, and the haze is less than 2%. PAM not only has mechanisms to reduce the conductive and convective heat transfer, but also can obstruct the radiative heat transfer. With a 4~6 mm thick PAM coating, the U-factor of a glass pane can be lowered from above 1 Btu/hft2°F to 0.5~0.6 Btu/hft2°F .PAM is resilient and robust, relevant to the window retrofitting applications.