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02 Dec 2008 05:12:43

New wind turbine design could triple power



New wind turbine design could triple power
A new wind turbine design which can generate as much energy as a conventional turbine with blades twice the size has been developed by scientists.

Using wind channelling technology found in jet engines, the designers at FloDesign Wind Turbine, have come up with a turbine that avoids one of the limits faced by many turbines.

Approaching wind is deflected as it nears the blades so even the most efficient existing designs capture 59.3 per cent of wind energy, reports the MIT Technology Review.

However, the new design features a shroud around the rotors which traps and directs air over the blades and makes the device resemble the air intake of a jet engine.

The design sees the wind funnelled towards the rotors slowed down as the blades spin, while the air outside continues at its usual speed. The difference between the fast air and the slow air behind the rotors creates an area of low pressure that sucks wind through the turbine, meaning less wind energy is lost.

Paul Sclavounos, professor of mechanical engineering at MIT, said the design could double or triple a turbine's power output.

According to the British Wind Energy Association, rotors are currently built up to 80 metres in diameter.

The bigger the rotor blades and the higher into the atmosphere they reach, the more wind power they can harness.

http://www.technologyreview.com/energy/21737/?a=f


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Discussion Thread  

rchrenko wrote:

05 Dec 2008

This seems to be a dream which never dies. I was a rotor design engineer back in the early 90's when this idea was getting some attention. If I recall correctly, there was even a small prototype built in New Zealand. While the *theoretical* efficiency is appealing, the problem is how on earth to put an enormous structure (like the one pictured) 80 meters up on a tower - and then face it consistently into the wind. The potential side loading and the required yaw forces are huge, not to mention transport and construction issues.

The numbers didn't add up 15 years ago. I would be hugely surprised if they do today.




Discussion Thread  

 


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