November 4-6, 2019
Surface coating with high solar reflectance and high thermal emittance are attractive for saving energy in buildings. Conventional paints typically have a solar reflactance < 93% due to UV and near infrared absorption. Here we demonstrate a porous PVdF copolymer surface coating that shows high solar reflectance of over 96% and high thermal emittance of 0.97. When it is placed under sunlight, it can be 6 oC cooler than the environment without any electricity.
Yuan Yang, "Porous radiative cooling paint for building thermal management" in "Energy Harvesting from Infrastructure and Ocean Systems (EHIOS)", Huiming Yin, Columbia University, USA Muhammad R. Hajj, Stevens Institute of Technology, USA Lei, Zuo, Virginia Tech, USA Eds, ECI Symposium Series, (2019). https://dc.engconfintl.org/ehios/38