普渡大学研发出“世界最白油漆” 降温功效“秒杀”空调

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A Purdue University professor of mechanical engineering(机械工程) and his students have created the whitest paint on record. When Purdue University researchers set out to develop a new paint, the goal was to create one that would reflect(反射) sunlight away from a building. It turns out they also set an official Guinness world record for the whitest paint on the planet. “When we started this project about seven years ago, we had saving energy and fighting climate change in mind,” Professor Xiulin Ruan said.

The paint reflects 98.1% of solar radiation(太阳辐射) while also giving out infrared(红外线的) heat. Because the paint takes in less heat from the sun than it gives out, a surface coated with this paint is cooled below the surrounding(周围的) temperature without using power.

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

Researchers did an outdoor test with a surrounding temperature of 43 degrees Fahrenheit(华氏摄氏度). The paint made the sample temperature lower by an additional 18 degrees. “That’s more powerful than the air conditioners used by most houses,” Ruan said.

Purdue said it has already applied for the patent(专利) and researchers are working with a company to scale up(增加) the paint to put it on the market.

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