Microsphere-Based Coatings for Radiative Cooling Under Direct Sunlight
AssigneeUNM Rainforest Innovations
InventorsSang Eon Han, Sang M. Han
Life of this patent
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Abstract
The present prevention provides a surface coating for cooling a surface by light scattering comprising a plurality of successive layers, each of the layers may be comprised of a plurality of spheres arranged to form a structure comprised of packed spheres. Each layer may have a different arrangement of packed spheres to create to a different light scattering property in each of the layers. The coating of the structures may also be formed by randomly packed spheres and the spheres may have a uniform diameter.
Claims24
A method for cooling a substrate by removing heat from the substrate and preventing the heating of the substrate comprising the steps of:
- applying a coating to the surface of the substrate;
- said coating containing randomly packed microspheres;
- said microspheres have a diameter between 0.4 and 1 microns:
- said coating has an average light emissivity of greater than 80% in a range of 8-13 microns;
- and
- said coating reflects incident light away from the substrate to prevent heating of the substrate, while radiatively removing heat from the substrate.
A method for cooling a substrate by removing heat from the substrate and preventing the heating of the substrate comprising the steps of:
- applying a coating to the surface of the substrate;
- said coating containing randomly packed microspheres;
- said diameter of said microspheres is less than 3 microns;
- said coating has an average light emissivity of greater than 80% in a range of 8-13 microns;
- and
- said coating reflects incident light away from the substrate to prevent heating of the substrate, while radiatively removing heat from the substrate.
A method for cooling a substrate by removing heat from the substrate and preventing the heating of the substrate comprising the steps of:
- applying a coating to the surface of the substrate;
- said coating containing randomly packed microspheres;
- said diameter of said microspheres is 0.4-3 microns;
- said coating has an average light emissivity of greater than 80% in a range of 8-13 microns;
- and
- said coating reflects incident light away from the substrate to prevent heating of the substrate, while radiatively removing heat from the substrate.
Dependencies are inferred from the claim text.