bladeless wind turbine full seminar report ppt
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bladeless wind turbine full seminar report ppt
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Wind energy has become a legitimate source of energy in recent decades as larger and more efficient turbine designs have produced ever-increasing amounts of energy. But even though the industry posted a record global investment of $ 99.5 billion in 2014, turbine growth could be reaching its limits.


Vortex says its bladeless turbines will generate electricity 40 percent less than the cost of conventional wind turbine power.
Transport is increasingly difficult due to the size of the components: individual blades and towing sections often require specialized trucks and straight and wide paths. Today's wind turbines are also incredibly heavy. Generators and gearboxes that are on support towers 100 meters above the ground can weigh more than 100 tons. As the weight and height of the turbines increase, the material costs of wider and stronger bearing towers, as well as the cost of keeping the components housed so far from the ground, are reducing the efficiency benefits of the turbines bigger.

The alternative energy industry has repeatedly tried to solve these problems without success. But the latest entry promises a radically different type of wind turbine: a bladeless cylinder that oscillates or vibrates.

The Spanish launch Vortex Bladeless has developed turbines that take advantage of vorticity, the rotating movement of air or other fluids. When the wind passes through one of the cylindrical turbines, cut the windward side of the cylinder in a rotating vortex or vortex. This vortex then exerts a force on the cylinder, causing it to vibrate. The kinetic energy of the oscillating cylinder is converted into electricity through a linear generator similar to that used to exploit the energy of the waves.

David Yanez, one of the company's co-founders, discovered the concept as a student studying the collapse of the Tacoma Narrows Bridge in Washington. The bridge collapsed in 1940 due to the excessive vibrations formed by the rotating motion of the wind as it blew past the bridge and is a failure of textbook engineering. Yanez, however, learned a different lesson. "This is a very good way to transmit energy from a fluid to a structure," he says.

The lightweight Vortex cylinder design has no gears or bearings. Yanez says it will generate electricity 40 percent less than the cost of conventional wind turbine power. The company has received $ 1 million in private equity and government funds in Spain and is seeking another $ 5 million in venture capital funds. Yanez says the company plans to launch a four-kilowatt system in 2016 and a much larger device by a megawatt around 2018.

The Vortex turbine sounds promising, but like any new radical alternative energy design, bladeless turbines have a lot of skeptics.

"If you have a common propeller type wind turbine, you have a large area swept by the blades," says Martin Hansen, a specialist in wind energy at the Technical University of Denmark. Here is a post.

In addition to capturing less energy, oscillating cylinders can not convert so much of that energy into electricity, says Hansen. A conventional wind turbine typically converts 80 to 90 percent of the kinetic energy of its rotating rotor into electricity. Yanez says his company's custom linear generator will have a 70 percent conversion efficiency.

It can be understood in the following video:

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