Windows welcome light into interior spaces, but they also bring in unwanted heat. A new window coating blocks heat-generating ultraviolet and infrared light and lets through visible light, regardless of the sun's angle.
Windows welcome light into interior spaces, but they also bring in unwanted heat. A new window coating blocks heat-generating ultraviolet and infrared light and lets through visible light, regardless of the sun's angle. The coating can be incorporated onto existing windows or automobiles and can reduce air-conditioning cooling costs by more than one-third in hot climates.
Window coatings used in many recent studies are optimized for light that enters a room at a 90-degree angle. Yet at noon, often the hottest time of the day, the sun's rays enter vertically installed windows at oblique angles. To shuffle the layers into an optimal configuration -- one that maximized the transmission of visible light while minimizing the passage of heat-producing wavelengths -- the team used quantum computing, or more specifically, quantum annealing, and validated their results experimentally.
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