Is this tree the future of electricity?
From a
distance this may look like an ordinary tree, but get closer and you will
discover it is actually a power generator.
French
company NewWind has created the "Arbre a Vent" or
"Wind Tree," a 3-meter-tall generator designed for urban environments
which makes the most of smaller air currents.
Operating
in near complete silence, the wind tree consists of 72 micro turbine "aeroleaves"
that rotate in the wind, generating an estimated 3.1. kW of power.
While this
isn't much compared to industrial-sized turbines, which typically generate in
the region of 1 - 3MW, having multiple smaller turbines has its uses.
"Urban
wind is not very strong, but it is very turbulent," says "Arbre à
Vent" engineer Julia Revuz. "These turbines need less wind to get
started and produce around 3kW of energy, which could heat a small home, fuel
lights or charge an electric car."
New wind was founded
by Jérôme Michaud-Larivière three years ago when he had the idea for the Wind
Tree while taking a walk. He saw the leaves on a tree moving in the wind and
started thinking about the possibility of turning that kinetic energy into
electricity.
The current prototype of the tree is
steel and the energy made from it goes into the electricity grid and is used
locally.
"We haven't yet optimized the
structure," says Revuz. "We are hoping to make the leaves out of
eco-friendly materials and for the tree to have as a low a carbon footprint as
possible."
A 12-meter tall prototype of the tree
will be on display from March 12 for two months at Place de la Concorde, a
major public square in Paris.
This prototype, which weighs around 5
tons and costs roughly $35,000, is to be used as an educational tool and will
aim to show the public the technology behind the structure. The wind tree will
be mass produced for sale from March 2015 and newwind says it has raised €1.15
million ($1.34 million) to begin pre-production.
"The reaction has been very positive
so far," explains Revuz. "People don't know how it works but they
like it, they find it magical.
"There is a very negative view of
wind energy, people think it's ugly and it ruins their landscapes. Then they
see the wind tree and they think differently."
Newwind has had interest from local
government in France and Europe, as well as real estate agents and businesses
that want to have the tree on their land. There are even talks about another
demonstration tree in London next year.
The Wind Tree may not be affordable and
practical for everyone, but there are other applications that could be more
accessible.
"Our technology is in the mini wind
turbines (the aeroleaves)," says Revuz. "So we are developing other
applications for them.
"Architects have been in touch and
are interested in using them in their work, perhaps on the roofs of buildings.
Mini turbines are cheaper to produce and buy than the wind tree."
Other ideas for the aeroleaves include
rooftop foliage installed on buildings, foliage on roadsides and the smart
balcony -- where the mini turbines are attached to balcony railings.
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