An eco-friendly smart day-time radiative cooling coating to keep buildings cool without air conditioners

I&T Solution An eco-friendly smart day-time radiative cooling coating to keep buildings cool without air conditioners
(REF: S-0951)
Matched I&T Wish
Trial Project
Solution Feature
  • The coating has broadband infrared emissivity that enables the heat dissipation to the outer space while dynamically exchanging heat with the atmosphere.
  • The coating uses Mie-resonance multi-layer particle scattering instead of metal based specular reflection to reduce the solar absorption.
  • The coating Integrates fluorescent pigments into the matrix to break through the limitation of conventional coating materials in achieving minimal solar absorption.
  • The coating is waterborne and has minimal VOC emission and thus is environmental friendly.
  • The coating has self-cleaning property, so as to minimize the dairly mainteance work.
Trial Application and Expected Outcome
  • The coated building surface can achieve a sub-ambient cooling effect (i.e. the surface temperature is lower than the ambient) in summer under direct sunlight in Hong Kong.
  • The room interior temperature difference between the coated and uncoated buildings will be known through the field trial tests when no air conditioner is used.
  • The electricity consumption difference between the coated and uncoated buildings will be known when the air conditioner is kept at a constant temperature (e.g. 25 degrees)
  • Establish an annual energy consumption model for tested buildings through numerical simulation considering the local climate effects.
Additional Solution Information AdvMater2020 Creating an eco-friendly building coating with smart sub-ambient radiative cooling.pdf
Info on I&T Solution Provider
Solution Provider:The Hong Kong Polytechnic University
Address:ZS936, Department of Civil and Environmental Engineering, The Kong Polytechnic University
Contact Person:Jian-guo Dai
Position:Professor and Associate Head
Tel:(852) 2766 6026
Email: cejgdai@polyu.edu.hk
Webpage: https://cejgdai.wixsite.com/website

For details of the above I&T solution, please contact the I&T solution provider.