(8) Giant Wind Turbines
Huge turbines mounted on floating platforms offshore using composite fibers and alternatives to weighty gear boxes.
Can be placed far from shore to avoid objections from residents to large wind farms near the shore ( visual pollution ).
Use of “tension –leg” platforms and sensor-based technology to quickly angle the blades in response to wind-speed changes is being considered for installation far out in the sea, may be at even 50m Water Depth.
GE in a $27 Million partnership with DoE developing 5-7 MW turbines by 2009. – Going up to 10 MW by 2015.
Mounted to towers 90-95 mtrs high.
Rotors – 140 mtrs Dia.
Needs higher reliability because of maintenance problem offshore.
MIT study reveals large turbines far offshore will be more cost effective than land based and near-offshore turbines, despite extra costs and cabling.
GE estimates that 20% of US energy will come from such large wind turbines by the next decade.