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<ul><li>An ultra-white paint developed at Purdue University can reflect sunlight and make the room cooler.</li><li>It can reflect 98.1% of solar radiation and also emit infrared heat.</li><li>This <keyword id="1562932" type="General" weightage="20" keywordseo="white-paint" source="Orion">white paint</keyword> could eliminate the need for air conditioning in houses.</li></ul>Researchers at Purdue University have developed an ultra-white paint that is said to reduce or even eliminate the need for air conditioning. It’s claimed to be the <a href="https://www.purdue.edu/newsroom/releases/2021/Q3/purdue-record-for-the-whitest-paint-appears-in-latest-edition-of-guinness-world-records.html">world’s whitest paint</a> developed at Purdue University, and it has even earned a Guinness World Record. But the idea behind making this paint was to help reduce global warming. The white paint was invented by Xiulin Ruan, a Purdue University professor of mechanical engineering, and his students. It’s a project seven years in the making with the purpose of saving energy and fighting climate change, according to a press release. <cmsannotation type="cmsannotation" annotationid="How does the white paint help?" comment="subhead" text="How does the white paint help?">How does the white paint help?</cmsannotation> The paint created reflects 98.1% of solar radiation and it also emits infrared heat at the same time. It ends up absorbing less heat from the sun than it emits which lets a surface coated with this paint cool below the surrounding temperature, and that too without consuming power. This paint used to cover a roof area of around 1,000 square feet could result in a cooling power of 10 kilowatts, according to Purdue researchers. This is also considered to be more powerful than the air conditioners used by most houses. <cmsannotation type="cmsannotation" annotationid="How it’s better than other white paint" comment="subhead" text="How it’s better than other white paint">How it’s better than other white paint</cmsannotation> The commercial white paint that we get actually gets warmer than cooler. Also, the paints that are designed to reject heat reflect only 80% to 90% of the sunlight and can’t make surfaces cooler than their surroundings. <cmsannotation type="cmsannotation" annotationid="Why is it so white?" comment="subhead" text="Why is it so white?">Why is it so white?</cmsannotation> Since the paint is very reflective it also resulted in being really white. The researchers explained that there is a very high concentration of barium sulfate, a chemical that is used in photo paper and cosmetics. There are different particle sizes of barium sulfate in the paint and the wider range of sizes help scatter more of the light spectrum from the sun. <cmsannotation type="cmsannotation" annotationid="Future plans" comment="subhead" text="Future plans">Future plans</cmsannotation> We could see this white paint hitting the market soon as the researchers have partnered with a company to scale up production. The researchers have also filed patent applications for this white paint. There is strong seriousness on making this white paint available for commercial use which could help eliminate the use of air conditioners and thereby help reduce power consumption. SEE ALSO: <a href="https://www.businessinsider.in/science/news/cat-lover-heres-a-chance-to-do-your-favourite-thing-for-research-watch-cat-videos/articleshow/86294662.cms" data-type="tilCustomLink">Cat lover? Here’s a chance to do your favourite thing for research — watch cat videos</a> <a href="https://www.businessinsider.in/tech/news/google-and-facebook-lay-thousands-of-miles-of-undersea-cables-to-ferry-internet-around-the-world-hereaposs-how-they-do-it-/slidelist/86339495.cms" data-type="tilCustomLink">Google and Facebook lay thousands of miles of undersea cables to ferry internet around the world. Here's how they do it.</a>

Researchers develop the whitest paint in the world that could reduce the need for air conditioning

<ul class="summary-list"><li>According to one professor, we can stop global warming if we used a new super white paint.</li><li>The problem though, is we would need to cover at least 1% of the earth's surface with the paint.</li></ul>I hope Purdue University is ready for this incoming order.In 2021, <a href="https://www.purdue.edu/newsroom/releases/2021/Q2/the-whitest-paint-is-here-and-its-the-coolest.-literally..html">researchers at Purdue University announced</a> that they had developed the whitest paint on Earth. The color is so white that it can reflect over 98% of light. This is particularly useful because light generates heat — and we here on Earth are running a bit hot these days.If used on a building, the researchers say, the paint would reduce the temperature on the surface, lowering the temps inside and decreasing the need for air conditioning. But what if there was an even bigger application, like reducing the temperature of the entire planet?<a href="https://static1.squarespace.com/static/5d832a10791b8a06dddc7b1f/t/5d8a80f755caf430f832a08c/1569358091209/Munday_Joule_2019.pdf">According to Jeremy Munday</a>, a professor of electrical and computer engineering at the University of California, Davis, who researches clean technology, if a material like Purdue's paint covered 1-2% of the Earth's surface, the amount of light being bounced back into space would reduce the amount of heat being absorbed by the planet enough to stabilize global temperatures. In other words, it could do a lot to solve climate change. Plus, <a href="https://www.nytimes.com/2023/07/12/climate/white-paint-climate-cooling.html" target="_blank" rel="noopener">Munday told the New York Times,</a> the amount of light being bounced back into space wouldn't harm the cosmos very much. "It'd be like pouring a cup of regular water into the ocean," <a href="https://www.nytimes.com/2023/07/12/climate/white-paint-climate-cooling.html" target="_blank" rel="noopener">he told the Times</a>.But just how big is 1-2% of the Earth's surface? The total surface area of the Earth is right around <a href="https://solarsystem.nasa.gov/planets/earth/by-the-numbers/" target="_blank" rel="noopener">197 million square miles</a> (and most of that is water), so the paint would need to cover between roughtly 2 million and 4 million square miles. For reference, the total land area of the United States is <a href="https://www.census.gov/geographies/reference-files/2010/geo/state-area.html" target="_blank" rel="noopener">just over 3.5 million square miles</a>, so we'd need to cover the country in white paint from sea to paint-stained sea.That would be a lot of paint. A LOT.If we assume the new paint acts like commerical paint, as the Purdue researchers suggest, <a href="https://affiliate.insider.com?h=f30fba0eda392b96b04b3860524573cd29bae6b6c787507011c7908a82df3290&amp;postID=64b02998d81c4d099a6ab184&amp;site=bi&amp;u=https%3A%2F%2Fwww.lowes.com%2Fn%2Fcalculators%2Fpaint-calculator">a gallon would cover about 400 square feet</a>, we would need roughly 139 billion gallons of the super-duper white paint to cover just 1% of the Earth's surface. Of course, that number doubles if we need to cover 2% of the surface. And none of this takes into account how hard it would be to paint oceans, deserts, and trees. <a href="https://www.businessinsider.com/new-york-city-painted-6-million-square-feet-of-rooftop-white-2018-8">Painting things white to reduce temperatures is not a new concept</a>. Just drive around my home state of Texas and see how many cars are white. <a href="https://www.businessinsider.com/los-angeles-is-spending-40000-per-mile-to-paint-streets-white-2018-3">Many places around the world are already painting surfaces white</a>, and Purdue's new paint will help. But it does show that we have a long way to go before the problem is solved.

Turns out all we may need to stop climate change is 139 billion gallons of super-duper white paint

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