Highly efficient flexible structured metasurface by roll-to-roll printing for diurnal radiative cooling

eLight - Tập 3 - Trang 1-12 - 2023
Keng-Te Lin1, Xianbo Nian2,3, Ke Li2, Jihong Han2, Nan Zheng2, Xiaokang Lu3, Chunsheng Guo3,4, Han Lin1,2, Baohua Jia1,2,5
1Centre for Atomaterials and Nanomanufacturing (CAN), School of Science, RMIT University, Melbourne, Australia
2Centre for Translational Atomaterials, Faculty of Science, Engineering and Technology, Swinburne University of Technology, Hawthorn, Australia
3School of Mechanical, Electrical & Information Engineering, Shandong University, Weihai, China
4Suzhou Research Institute, Shandong University, Suzhou, China
5The Australian Research Council (ARC) Industrial Transformation Training Centre in Surface Engineering for Advanced Materials (SEAM), RMIT University, Melbourne, Australia

Tóm tắt

An ideal radiative cooler requires accurate spectral control capability to achieve efficient thermal emission in the atmospheric transparency window (8–13 μm), low solar absorption, good stability, scalability, and a simple structure for effective diurnal radiative cooling. Flexible cooling films made from polymer relying on polymer intrinsic absorbance represent a cost-effective solution but lack accuracy in spectral control. Here, we propose and demonstrate a metasurface concept enabled by periodically arranged three-dimensional (3D) trench-like structures in a thin layer of polymer for high-performance radiative cooling. The structured polymer metasurface radiative cooler is manufactured by a roll-to-roll printing method. It exhibits superior spectral breadth and selectivity, which offers outstanding omnidirectional absorption/emission (96.1%) in the atmospheric transparency window, low solar absorption (4.8%), and high stability. Impressive cooling power of 129.8 W m−2 and temperature deduction of 7 °C on a clear sky midday have been achieved, promising broad practical applications in energy saving and passive heat dispersion fields.

Tài liệu tham khảo

C. Mooney, B. Dennis, The world is about to install 700 million air conditioners. Here’s what that means for the climate. https://www.washingtonpost.com/news/energy-environment/wp/2016/05/31/the-world-is-about-to-install-700-million-air-conditioners-heres-what-that-means-for-the-climate/. 2016. Accessed July 2020.

Guide for design of thermal insulation of equipments and pipes. (China Quality and Standards Publishing & Media Co., Ltd., 2008).