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The Lateral Axis Wind Turbine

The lateral axis wind turbine deliver breakthrough clean energy technology differ from horizontal axis wind turbine and vertical axis wind turbine for having its central shaft mounted horizontally on upright supports while turbine blades spin on extended arms around the central shaft.

Sri Lankan inventor Leelananda Jayasuriya just sent us this concept for a Lateral Axis Wind Turbine. The turbine functions just like a Ferris Wheel, with the blades orbiting in an epicyclical path around the central shaft. Leelananda believes there are many advantages to his design: it can rotate with the direction of the wind, it generates less sound, is safer for birds and bats, and can be built for cheap using locally available materials. He also believes that it could potentially generate up to 20 Megawatts of commercial electricity.

We’re not sure how feasible that is
, considering wind turbines typically generate 1.5 MW. It also seems Leelananda’s design has more moving parts, which must require more maintenance. That said, this could have practical applications for rural areas to power small farming operations and water pumps.

The vertical axis wind turbine is mainly consisted of two types. The first type uses aerodynamic resistance of the wind, and the most typical structure is S-typed Rotor, which consists of two semi-cylindrical blades whose axes are staggered. The virtue of this type is high starting torque, but the shortcoming is the asymmetrical gas flow around the rotor, which forms lateral thrust. As for the relatively large-sized wind turbine, for the deflection and safety limitation, it is quite difficult to employ this structure. The ratio often utilization of the wind is lower than that of the High-speed Vertical axis wind turbine or Horizontal axis wind turbine, and the output of power is lower in a certain circumstance of the size of the rotor, weight and cost, so it lacks competition if it is used to generate power.

The second type applies the lift of the airfoil to work, and the most typical type is the Darrieus-typed Wind Turbine, which was invented by a French man named Darrieus in 1925. it has may different models, such as the Φ structure,Δ structure,Y structure and H structure and so on. But as its wind area is small and accordingly the starting wind speed is high, it has not been taken into practice in a large scale.


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