MIT Graduates Develop A Color-Changing Roof Tile

A team of recent MIT graduates has developed roof tiles that change color based on the temperature. The the tiles are white when the temperature is hot, allowing them to reflect away most of the sun’s heat. The reverse happens when the temperature is cold, they turn black to retain heat.

“The team’s lab measurements show that in their white state, the tiles reflect about 80 percent of the sunlight falling on them, while when black they reflect only about 30 percent. That means in their white state, they could save as much as 20 percent of present cooling costs, according to recent studies. Savings from the black state in winter have yet to be quantified.”

Read more at www.impactlab.com

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