Date: 6 months ago   Category: Hi-Tech

The material preventing frosting thanks to energy of the Sun is created

He uses three-layer structure which allows to hold and extend heat.

Engineers from the Massachusetts Institute of Technology (MIT) have developed three-layer material which absorbs sunlight and, holding him, prevents freezing of a surface. Work is published in the Science Advances magazine.

Formation of ice - threat for many devices, including planes and wind turbines. The fight methods existing today aren't always effective: for example, superhydrophobic structures are connected by hoarfrost that does all system useless, - therefore scientists improve them. Researchers from MIT have invented inexpensive material which doesn't need additional power sources and uses the radiation of the Sun for prevention of frosting. They called it a photothermal trap (photothermal trap).

It consists of three layers. The first layer - composite, it includes ceramic and metal substances (cermet). Thanks to the structure, he absorbs 95 percent of sunlight, and gives only three. The problem is that it generates heat only in those places where on him light falls, and at the same time gives a part of energy to underlying layers.

For the solution of these problems engineers have added the second layer - aluminum - only 0,4 millimeters thick. Metal receives heat from the top layer and distributes him on all surface. According to professor Kripy of Kripa Varanasi, heating happens because of a fast warm response quicker than freezing.

the Third layer - foam insulation which allows to keep heat within the first two and doesn't let him below. Thus, when the first layer, heat, thanks to the second heats up, it is distributed on all surface. The lower part of ice thaws, and the thin layer is formed of water, the surface becomes slippery therefore other part of ice just slides off. Scientists have already carried out tests to laboratories with artificial lighting and under the open sky - all of them were successful. In the future the technology can be used not only on planes, but also on roofs of usual houses. you can also watch with

video in which it is shown that will be if to mix the melted aluminum with the ice liquid nitrogen and solid carbon dioxide also known as artificial ice.




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