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The new white paint can reflect 95.5% of the sun and has the potential to combat global warming
Scientists in the United States have created the whitest shades of white paint in the world — and researchers claim that it may help fight global warming.
Engineers at Purdue University in Indiana have developed an ultra-white paint that reflects 95.5% of the sun’s rays and keeps the surface cooler than the surroundings up to 18 degrees Fahrenheit.
The team hopes that this creation will reduce the need for air conditioning without consuming energy.
“It’s not very intuitive that the surface exposed to direct sunlight is below the temperature reported by local meteorological stations for the area, but we’ve shown that this is possible,” said Purdue University. Professor of Mechanical Engineering Xiulin Ruan Said last week While announcing the discovery.
According to researchers, infrared cameras have confirmed that the new paint is below the temperature of both ambient and commercial paint. Other paints that reflect sunlight only bypass 80-90% and cannot reach temperatures below their surroundings.
The unnamed acrylic paint formulation was a six-year process that ultimately used calcium carbonate (a compound found in rocks and shells) as a paint filler.
According to the paper, it can even send reflected UV light into deep space Published in the journal Cell Reports Physical Science.
“Compared to traditional air conditioners that consume electricity and only transfer heat from inside the space to the outside, passive radiative cooling not only saves heat because it is lost directly into deep space, but also global warming. It also competes with the study. ” ..
Scientists believe that if technology that looks like commercial paint is applied to roads, rooftops, and cars around the world, the surface of the earth will cool. It’s even cheaper than commercial paints, and could save about $ 1 a day in the electricity used to cool a one-story house, according to a team at Purdue University.
“The air conditioner works primarily because the sunlight warms the roofs and walls and makes the inside of the house feel warm,” said Joseph Peoples, a mechanical engineering student and research co-author at Purdue University. .. “This paint basically creates a free air conditioner by reflecting its sunlight and offsetting the increase in heat from inside the house.”
Fewer air conditioners in use means less energy is produced by coal, which can lead to lower carbon dioxide emissions, Peoples said.
Additional research is underway at Purdue University to assess these potential benefits, according to university officials.
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