Letter: Ocean wind project already old
The commercial land-based wind industry in New England has had its share of turbine gear-box failures.
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#1 May 7, 2013
Under the current Massachusetts Grid operators rules, the traditional power companies gas, coal, oil have to bid on power the day before they get paid; for example, 6 cents per kilowatt hour.
Under the current rules, the commercial wind turbine companies automatically get paid the day they produce the power for example, 18 cents per kWh because they can only produce power when the wind blows. The Grid operator has to take the renewable energy wind product first that day.
The traditional power company is glad to stand down when the commercial wind turbine company is producing power.
What the public needs to understand is that in Massachusetts, when the commercial wind company is getting paid the 18 cents, the traditional company that bid the previous day stands down and gets paid anyway.
Thus the cost to Massachusetts electric rate payers is the 18 cents plus the 6 cents the traditional company bid the previous day. The cost per kilowatt hour could cost up to four times normal bid costs.
Massachusetts needs to review the electric bid process and how it affects residential and business customers. Massachusetts is one of the few states to use the current formula.
#2 May 7, 2013
Siemens seeks to consolidate market lead with 4MW turbine
" Siemens seeks to consolidate market lead with 4MW turbine
By Eize de Vries,
Thu Dec 20 2012, 11:47 AM
Early in December, Siemens installed the first prototype of its 4MW SWT-4.0 offshore wind turbine at a Jutland test site for large wind turbines in Østerild, Denmark. The machine represents a second upgrade of the initial 3.6MW geared SWT-3.6-107 platform introduced in 2004 and the current 3.6MW SWT-3.6-120 with enlarged rotor of 2009. Around 500 units of these two offshore models have been installed so far, with Siemens reporting a 1200-turbine order backlog.
The prototype has initially been fitted with a 120-metre diameter rotor. In early 2013 it will be refitted with 63-metre B63 blades that are being developed in house to give the turbine a 130-metre rotor diameter.
The nacelle and tower structures are essentially upgraded 3.6MW variants, and the B63 blades are manufactured using in-house IntegralBlade technology that eliminates shell bonding joints. Siemens retained the proven high-speed drivetrain concept but the SWT-4.0 incorporates a new higher rated gearbox and an optimised induction generator cooling system.
#3 May 29, 2013
Ocean wind project will be great for fishing.
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