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Scientists created the world's whitest paint. It could eliminate the need for air conditioning.

“When we started this project about seven years ago, we had saving energy and fighting climate change in mind,” said Xiulin Ruan, a professor of mechanical engineering at Purdue, in a statement.

The idea was to make a paint that would reflect sunlight away from a building, researchers said.

Making this paint really reflective, however, also made it really white, according to Purdue University. The paint reflects 98.1% of solar radiation while also emitting infrared heat. Because the paint absorbs less heat from the sun than it emits, a surface coated with this paint is cooled below the surrounding temperature without consuming power.

Using this new paint to cover a roof area of about 1,000 square feet could result in a cooling power of 10 kilowatts. “That’s more powerful than the air conditioners used by most houses,” Ruan said.

Typical commercial white paint gets warmer rather than cooler. Paints on the market that are designed to reject heat reflect only 80% to 90% of sunlight and can’t make surfaces cooler than their surroundings.

Two features make this paint ultra-white: a very high concentration of a chemical compound called barium sulfate – also used in photo paper and cosmetics – and different particle sizes of barium sulfate in the paint, scientists at Purdue said.

Researchers at Purdue have partnered with a company to put this ultra-white paint on the market, according to a news release.
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There are specially coated windows used in some new builds in AZ that significantly cut the amount of heat that's allowed through without being tinted. Some years ago we were out looking at houses in Phoenix in this new subivision on Baseline on one of those 118-120 degree days and we went to check out this crib. The realtor was talking about the glass and I noticed that there was next to zero heat coming from these big ass windows in the front of the house directly facing the sun. We got into a whole discussion about how all the windows in the house being like this cuts your electric bill in the summer 'cause you don't have to run the AC as much.

Combine this paint and those windows on a new house and I could see a significant savings, especially in the southwest.
 
deadeye said:
Eliminate the need for air conditioning though?



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I don't know about that.


I mean, it's paint.........not insulation.
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