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Picture a steady breeze blowing through the leaves of a tree.

Picture a steady breeze blowing through the leaves of a tree. Now imagine these leaves could do more than simply churn in the current of air—what if they could capture the wind and transform it into renewable energy?

Energy from wind is the fastest growing source of electricity in the world, according to the Union of Concerned Scientists, an environmental and social research institution. This development of wind power has mostly taken place on a large scale, usually by utility companies providing power to a grid of millions of customers. That’s because wind energy is most efficient when it’s capturing very strong winds, more common in remote areas and at heights greater than 50 feet off the ground. Those turbines need to be as tall as a five-story building, and they take up a lot of horizontal room, too—several hundred feet per turbine, in many cases. They also require more maintenance than solar panels.

All of these factors make it challenging to capture wind energy in small amounts. But that hasn’t stopped companies from experimenting in the hopes of one day allowing individual homeowners to capture energy from their own backyards or balconies, and reduce their reliance on fossil fuels.

 

Last December, two “wind trees quietly churned in a plaza in Paris, as world leaders met for the historic climate talks at the Le Bourget conference center nearby. Developed by a French company called New Wind, the “trees” had plastic “leaves” painted green, with curves that held dozens of tiny blades soundlessly harnessing the wind no matter which way it blew. Unlike larger industrial turbines, which need winds of over 22 miles per hour to function, the leaves captured energy from wind speeds of less than five mph.

New Wind was founded by former film and television writer Jérôme Michaud-Larivière in 2011, and created its first prototype in 2013. The latest design is just under 30 feet tall and 23 feet wide, sporting a total of 54 leaf-turbines that can capture up to 5.4 kilowatts of energy at a time and produce around 2,400 kWh annually. The startup estimates this would meet 83 percent of the average French household’s annual energy needs; run a small, low-consumption office for 12 months; power 15 street lamp or charge an electric car for 10,168 miles each year. That’s the equivalent of about 160 gallons of fuel. A lot of companies are looking for renewable energy. In January, New Wind installed its first tree for a private company, the Swiss bank Piguet Galland. They also have contracts to provide more trees to companies in France, Germany, Switzerland and Luxembourg in the year ahead

One advantage of the unusual wind turbines, however, is their adaptability to different locations. A  5.4 kW solar array would take up about 430 square feet of roof space—not an option for those living in apartments or houses without direct sunlight. But a wind tree’s curved branches could be attached to any balcony or rooftop, even in areas that don’t get much wind.

 

#collected from internet

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