Summer! It’s a wonderful time but a hot one! Indeed, most would argue that you cannot survive summer without some good air conditioning. But what if your buildings or cars never heated up? Purdue University engineers have developed a white paint that can keep all surfaces cool — specifically, up to 18 degrees Fahrenheit (roughly 10 °C) cooler than their ambient surroundings. Moreover, the "super-white" paint reflects 95.5% sunlight and efficiently radiates infrared heat. Acts almost like a refrigerator without consuming any energy "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," said Xiulin Ruan, a Purdue professor of mechanical engineering. The paint works by absorbing nearly no solar energy and sending heat away from wherever it is used. It can even help with climate change by sending heat away from Earth into deep space where it can no longer affect our planet. "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, a postdoctoral researcher at the Massachusetts Institute […]


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