A transparent film for windows avoids 70% of solar heat | Technology


The fight against heat leaves an important mark on the energy bill. United States, about 6% of all electricity produced in the country is intended to reduce the temperature of homes and offices through air conditioning. This consumption, translated into figures, supposes an expenditure of 29,000 million dollars a year, without counting the incalculable impact on the environment. A team of researchers from the Massachusetts Institute of Technology (MIT) has found a product that drastically reduces the need to turn on the air conditioning.

Researchers have proposed to face the problem of heat from another prism: instead of facing him once he has already entered the home, they have proposed to prevent the interior of houses from becoming hot as a result of the direct or indirect action of the sun through of the windows, the main access route of solar heat. This is where researchers have strived to find a clever way to avoid overheating the stay in summer without limiting the entry of the sun in winter. That is, make the most of the sun when it is most needed and avoid suffocation when it is not necessary.

The film created at MIT reacts to the heat of one hand.
The film created at MIT reacts to the heat of one hand.

The problem has been faced with a transparent film It adheres to the windows and allows the passage of the rays while the outside temperature is 32 degrees. Above this temperature, the film prevents the heat from rejecting the sun's rays. The best thing about this system is that it works in a completely autonomous way and without the need for human intervention or any type of connection to any system.

The film, once attached to the windows, is able to block 70% of the solar heat, with the consequent savings in air conditioning. The team of researchers calculates that a building with this film attached to the windows could reduce its electricity consumption by around 10%. Although the figure does not seem spectacular, on a large scale and considering that they work autonomously, the benefit can be considerable.

How exactly does the development of MIT work? The film incorporates tiny spheres that contain water and, when the film reaches a temperature of 32 degrees Celsius, the spheres are compressed causing the same effect as the vapor and partially opaque the window. Unlike other smart windows that face heat changing the color and reducing the entry of light, this development would hardly reduce the brightness of the rooms and at a predictably much lower cost.

The MIT team of researchers is now fine-tuning the formula to see if they can improve heat reduction. Although the product is still far from being commercialized, it is a very encouraging start because the materials used They are very common and can be used without problems in the manufacturing processes of the windows.

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