I&T Solution |
An eco-friendly smart day-time radiative cooling coating to keep buildings cool without air conditioners
(REF : S-0951)
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Matched I&T Wish |
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Trial Project |
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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.
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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.
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Additional Solution Information |
AdvMater2020 Creating an eco-friendly building coating with smart sub-ambient radiative cooling.pdf
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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
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Tel | : |
(852) 2766 6026
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Email | : |
cejgdai@polyu.edu.hk
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Webpage | : |
https://cejgdai.wixsite.com/website
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