Energy-saving solution: Colorado Department of Energy runs self-sustainable office building based on renewable energy

Can you believe that an office building accommodating hundreds of employees, can operate by producing own energy without paying a penny for this utility?

It may sound indeed like a dream, but in the US state of Colorado such a dream came true. The self-sustainable building in question headquarters the Department of Energy and produces more energy than it consumes.

The key factor for such a success relies on the storage of the excess renewable energy. Practically, what is generated over day is used at night.

“Every time the sun shines out there, we produce more energy than we can use, and our goal is to have a positive balance at the end of the year. If we save energy then we do not have to produce it. It is cheaper to spare it instead of using it,” says engineer Shanti Pless.

When it comes to energy-saving solutions, the office buildings are a true challenge.

“On a sunny day, we save about 85 percent energy over a typical office building,” he added.
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“The light enters the building from the side and strikes the surface of a mirror before being diverted to an area of interest. Hence, after the solar rays reach the flat mirror surface, they are redirected toward the ceiling. You can see them in the installation hanging up on the window right here and this is the big version.”

Although it seems incredible, the building manages to operate without employing additional energy sources.

“Our solar panels produce more energy than we can use over the course of a year. We consume about 3.5 million kilowatts per year and produce a little more than this amount. A regular office building that is not designed to be energy efficient, uses 70 percent more energy than we produce here,” he says.

The American project proved to be very successful on the way to waste-free, self-sustainable processes.