Global warming and the use of air conditioners is a cycle that many scholars have questioned. It is estimated that this type of device accounts for 20% of the world’s energy consumption, which may represent in the future the problem of environmental stability.

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So designed a group of scientists in the United States Idea to reduce energy consumption and, by the way, achieve higher performance to get more cooling in homes, because according to the International Energy Agency (AEI) by 2050 there will be 5.6 billion air conditioners in the world.

In this way, a group from Purdue University in Indiana designed an alternative cooling system based on the use of white paint on the walls. “Do you want to save a lot of air conditioning bills? Wait a few years to cover your home with the world’s whitest paint, which can drastically reduce or even eliminate the need for air conditioning.” University in a statement.

How does this paint work to replace HVAC?

This project has been going on for several years and Professor Xiulin Ruan is responsible for the idea. The goal is to create a coating that reflects sunlight away from the building, thus providing a different alternative to air conditioners and reducing their use.

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During the project, the idea was deepened that the paint to be used should be increasingly white, to have an almost complete reflection of heat radiation and thus achieve the expected cooling in the room.

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The formula created by the Rowan Laboratory reflects 98.1% of the solar radiation at the same time as it emits infrared heat. Since the coating absorbs less heat from the sun than it emits, the surface covered with this coating cools below room temperature without consuming energy.Purdue University explains.

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So by covering 304 square meters with this coating, a cooling power of 10 kilowatts can be achieved, which “It’s more powerful than the air conditioners that most homes use.”

But it’s not just about painting the wall white, It must be mixed with barium sulfate to achieve optimum tone and expected effects.

“The wavelength of sunlight scattered by each particle depends on its size, so a wider range of particle sizes allows the coating to scatter more than the spectrum of sunlight,” the university said.


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