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Tuesday 17 April 2018

Clever coating opens door to smart windows




Researchers from RMIT University have developed a new ultra-thin coating that responds to heat and cold, opening the door to “smart windows”. The self-modifying coating, which is a thousand times thinner than a human hair, works by automatically letting in more heat when it’s cold and blocking the sun’s rays when it’s hot. Smart windows have the ability to naturally regulate temperatures inside a building, leading to major environmental benefits and significant financial savings. Lead investigator, associate professor Madhu Bhaskaran said the breakthrough will help meet future energy needs and create temperature-responsive buildings. “We are making it possible to manufacture smart windows that block heat during summer and retain heat inside when the weather cools,” Bhaskaran said.
“We lose most of our energy in buildings through windows. Our technology will potentially cut the rising costs of air-conditioning and heating, as well as dramatically reduce the carbon footprint of buildings of all sizes,” she said.
Smart glass windows are about 70 per cent more energy efficient during summer and 45 per cent more efficient in the winter compared to standard dual-pane glass. New York’s Empire State Building reported energy savings of $2.4 million and cut carbon emissions by 4,000 metric tonnes after installing smart glass windows. This was using a less effective form of technology.

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