Features and Benefits
Comparing Linear Wind Generator (LWG) to Wind Turbines Generator (WTG)
POWER OUTPUT – Approximately twice the power output for an equivalent wind envelope. (Based on total annual power output over a wide range of wind speeds)
NO HIGH RATIO GEAR BOX IS REQUIRED - Because the drive shaft has a much higher rpm than a conventional WTG, the generator can be direct driven being part of the drive shaft assembly or driven on its own shaft with a 1:1 or low ratio belt/gear drive.
ACCESSIBILITY - The generator is located at the bottom of the machine and not high in the air. This permits easy accessibility for maintenance.
STRUCTURE - A conventional Wind Turbine Generator (WTG) requires approx. 600 tonnes of concrete for the foundation and is a trade off for the power the WTG can produce verses the size of the foundation required to keep the tower from falling over. A similar capacity LWG would require <10% of this concrete as it’s strength lies in the guy wires and not the mass of the foundation. The use of guy wires allows higher power recovery before spilling wind.
The guy wire approach also permits the LWG to be lowered in areas prone to hurricanes and cyclones.
PLACEMENT - Can be guyed as a single unit or multiple units guyed in a line or multiple units supported by a single guyed gantry type support structure.
LOW COST - Only 40% of the cost of an equivalent powered WTG.
Land area requirement for an equivalent electrical output is also significantly smaller.
EASE OF INSTALLATION - The LWG is assembled horizontally on the ground with the lower end attached to a lower pivot point. The guy wires are then set out and finally, with the aid of an “A” frame, the LWG is raised into position by mechanical means.
EASE OF MANUFACTURING - Blades on the LWG have constant cross sectional shape over their entire length. This makes them easy to make with the intention of extrusion manufacture.
Manufacturing tolerances on individual components are generous.
EASE OF TRANSPORTATION - Blades are shorter and easier to transport as many blades can be carried at once.
WIND SPEED RANGE – The LWG can operate over a wide wind speed range because the blades can be angled optimally for any wind speed. Also the basic machine can be fitted with many large area blades for high solidity, low wind speed sites or fewer blades of small area for low solidity, higher wind speed sites.
POWER LEVEL CHANGES - The size (height and width) of the LWG structure can be varied to suit the power requirements of the application. Blades can be made longer and/or the number of blades (cable length) increased to produce more power with little change to the end mechanisms.
ALIGNMENT – The LWG is self aligning into the wind using a castor angle and cowlings acting as wind vanes.
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