Scientists create radiation-cooled paint that repels 95% of light

Radiation cooling technology that can be used in commercial paints may be less

costly in production, besides thisthe paint passively reflects 95.5% of sunlight. In contrast, commercial “heat-repellent paints” currently on the market reflect only 80–90% of solar radiation and cannot reach temperatures below ambient.

In the summer, as well as in regions with a warm climate, conventional air conditioning systems operate in the offices. They require energy, generate excess heat and contribute to the climate crisis.

Scientists are developing a paint for radiationcooling since the 1970s. Previously developed designs could not reflect enough sunlight to function as a viable commercial alternative to air conditioners.

Для того, чтобы создать достойную альтернативу air conditioners, the team used calcium carbonate fillers instead of standard titanium dioxide particles. This helped to minimize the amount of UV light absorbed by the paint.

To demonstrate how good thesethe modifications improved the coolability of the paint, and the researchers conducted tests in West Lafayette, Indiana. The paint sample remained 10 degrees below ambient temperature at night and at least 1.7 degrees below ambient temperature when the Sun was at its zenith.

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