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Current issue

ELEKTRO 4/2019 was released on April 17th 2019. Its digital version will be available on May 13th 2019.

Topic: Topic: Electroinstallation; Smart buildings; IoT; HVAC; Security technology

Main Article
Smart Cities (part 9)

SVĚTLO (Light) 2/2019 was released on March 15th 2019. Its digital version will be available immediately.

Architectural and scenic lighting
The architectural lighting of Bečov nad Teplou castle
Lighting design in a nutshell – Part 41
The analyse of light picture a little more theoretic

Day light
Biggest mistakes in day lighting design of buildings

See-through film rejects 70 percent of incoming solar heat

09.11.2018 | MIT | www.mit.edu

To battle the summer heat, office and residential buildings tend to crank up the air conditioning, sending energy bills soaring. Indeed, it’s estimated that air conditioners use about 6 percent of all the electricity produced in the United States, at an annual cost of $29 billion dollars — an expense that’s sure to grow as the global thermostat climbs.

Now MIT engineers have developed a heat-rejecting film that could be applied to a building’s windows to reflect up to 70 percent of the sun’s incoming heat. The film is able to remain highly transparent below 32 degrees Celsius, or 89 degrees Fahrenheit.

See-through film

The film is similar to transparent plastic wrap, and its heat-rejecting properties come from tiny microparticles embedded within it. These microparticles are made from a type of phase-changing material that shrinks when exposed to temperatures of 85 degrees Fahrenheit or higher. In their more compact configurations, the microparticles give the normally transparent film a more translucent or frosted look.

Read more at MIT

Image Credit: MIT

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