Unique White Paint Can Lower The Use Of Air Conditioning

The temperature in summer is increasing day by day around us. Air conditioning has now become an essential part of living which is cooling us but it is heating the atmosphere outside.

Engineers from Purdue University have made a unique “white paint” that can keep all the surface from rooms to cars outside cooler without the use of air conditioning. It can keep the surfaces cooler up to 18 Degree Fahrenheit (-7.778°C) than their surrounding without the consumption of any energy.

Xiulin Ruan (left) and Joseph Peoples use an infrared camera to compare the cooling performance of unique white paint samples on a rooftop.

Image Source – purdue

Xiulin Ruan said, “It’s very counterintuitive for a surface in direct sunlight to be cooler than the temperature your local weather station reports for that area, but we’ve shown this to be possible.”

The most important thing about the new paint is that it does not only keep the heat away from various surfaces but it also takes away the heat from the earth into the deep space where it cannot affect our planet. The best part of this process is that the heat never gets captured by the atmosphere.

“We’re not moving heat from the surface to the atmosphere. We’re just dumping it all out into the universe, which is an infinite heat sink,” said Xiangyu Li.

He also said that the earth’s surface would get cooler if this paint is applied on roads, buildings, and cars all around the world. The researchers showed the difference between the commercial white paint and their unique white paint in the journal Cell Reports Physical Science. The proof of the unique paint was seen with the help of infrared camera images.

Image showing the white radiative cooling paint developed by Purdue University researchers (left, purple) can stay cooler in direct sunlight compared with commercial white paint taken by the An infrared camera.

Image Source – purdue

Ruan said “An infrared camera gives you a temperature reading just like a thermometer would judge if someone has a fever. These readings confirmed that our paint has a lower temperature than both its surroundings and the commercial counterpart.”

Researchers after various findings over numerous combinations settled on a formulation made of calcium carbonate which is available in a very huge quantity and easily available in rocks and seashells.

The cost of this unique paint would be cheaper than the commercial paint used and it would also save a dollar every day that would have been spent on air conditioning in a house of approximately 1,076 square feet.

Joseph Peoples, the co-author of the work said “Your air conditioning kicks on mainly due to sunlight heating the roof and walls and making the inside of your house feel warmer. This paint is creating free air conditioning by reflecting that sunlight and offsetting those heat gains from inside your house.”

It is clear enough that this paint is really useful to us and it can maintain a low temperature for us in direct sunlight reflecting more ultraviolet rays than the commercial paint and it would be an amazing component to fight global warming all around the world.

Source – purdue

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