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|Title:||Sub-ambient radiative cooling under tropical climate using highly reflective polymeric coating||Authors:||Han, Di
Raman, Aaswath P.
Ng, Bing Feng
Engineering::Mechanical engineering::Alternative, renewable energy sources
|Issue Date:||2022||Source:||Han, D., Fei, J., Mandal, J., Liu, Z., Li, H., Raman, A. P. & Ng, B. F. (2022). Sub-ambient radiative cooling under tropical climate using highly reflective polymeric coating. Solar Energy Materials and Solar Cells, 240, 111723-. https://dx.doi.org/10.1016/j.solmat.2022.111723||Project:||2018-T1-001-070||Journal:||Solar Energy Materials and Solar Cells||Abstract:||While passive radiative cooling has shown great potential in temperate regions in lowering surface temperatures, its cooling performance under tropical climate that is characterised by high solar irradiance and humidity still lacks exploration. Herein, we adopt a highly reflective polymeric coating with BaSO4 particles dispersed in P(VdF-HFP) matrix for radiative cooling in the tropics. Through the strong Mie scattering of sunlight and intrinsic bond vibration, the substrate-independent average solar reflectance and infrared emittance within the 8–13 μm atmospheric window could reach 97% and 94.2%, respectively. For the first time, surfaces could maintain sub-ambient temperatures under direct exposure to the sky and surroundings even when the solar intensity was 1000 W/m2 and downwelling atmospheric radiation was 480 W/m2, while separately achieving 2 °C below ambient during night-time with an effective cooling power of 54.4 W/m2. With a scalable fabrication-process, our cost-effective single-layer coating can be easily applied to diverse substrates, which is suitable for real-world applications in the tropics.||URI:||https://hdl.handle.net/10356/157211||ISSN:||0927-0248||DOI:||10.1016/j.solmat.2022.111723||Rights:||© 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/bync-nd/4.0/).||Fulltext Permission:||open||Fulltext Availability:||With Fulltext|
|Appears in Collections:||MAE Journal Articles|
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|Han 2022. SEMSC. Sub-ambient radiative cooling under tropical climate using highly reflective polymeric coating.pdf||5.88 MB||Adobe PDF||View/Open|
Updated on May 24, 2022
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