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Current issue

ELEKTRO 11/2018 was released on October 31th 2018. Its digital version will be available on November 30st 2018.

Topic: Switchboards and substations; Maintenance of electrical equipment; Rotating electrical machines and drives

Main Article
Smart Cities (part 4 – volume 1)

SVĚTLO (Light) 5/2018 was released on September 17th 2018. Its digital version will be available immediately.

Interiors lighting
Luminaire selection by the concept of interior
The unique book about interiors nowadays on market
Invitation on colloquium Interiéry 2018 – exceptional action for the seventh time

Newsreel
Profesor Jiří Habel passed away – memories remain

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

-jk-