Wind Generator Blades
New generation of wind turbines
London, England --- ESI-AFRICA.COM --- 21 June 2011 - A trend towards larger capacity turbines with longer blades and larger rotor diameters has been long established with a range of rotor diameters, but now a new global generation of still larger machines has been unveiled.
Among those companies unveiling new models, REpower Systems AG introduced its 3.2M114. Optimised for low-wind locations, the 3.2 MW turbine has a 143m hub height and a 114m rotor.
A hybrid tower made of concrete and steel is to be used. At the end of 2010, two 3MW turbines were erected on 128m hybrid towers in Germany. A second 3.2M114 prototype, with a hub height of 93m and a steel tube tower, is due to be erected in late 2011.
Matthias Schubert, REpower chief technology officer says: “Especially in the European market, greater hub heights allow new sites to be developed. In southern Germany, for example, significant unexploited potential still exists in hilly terrain and forested areas.”
REpower majority-owner Suzlon, meanwhile, has also launched a low-wind version of an existing platform recently with its new S9X suite of machines.
An evolution of Suzlon's platform, the upgrade is built around doubly fed induction generator-based technology. New blade designs with rotor diameters of 95 and 97m offer power production from moderate to low wind speeds, the company says, and tower heights of 90 or 100m are available for the 2MW machine.
Serial production of the S95 turbine is scheduled to begin in Q2 of the 2011/2012 financial year, followed by the S97 in Q4.
Similarly, Alstom has revealed an upgrade to its existing 3MW ECO 100 platform to specifically address low wind speed sites with a new IEC Class III-A turbine, the ECO 11X, with a larger rotor diameter. The exact rotor diameter, in the range of 115 to 125m, will be released in the second half of 2011, when the turbine will be offered for delivery starting in 2013.
Earlier the company had announced a new partnership with French generator manufacturer Converteam in a move that will bring the company's direct drive permanent magnet generator to Alstom's under-development 6MW offshore wind turbine.
Wind Generator Blades - News
An evolution of Suzlon's platform, the upgrade is built around doubly fed induction generator-based technology. New blade designs with rotor diameters of 95 and 97m offer power production from moderate to low wind speeds, the company says,
The massive blades kick up very little turbulence thanks to the spoilers running along their lengths, nor do they make much noise thanks to their sound-minimizing tips. It also has no gearbox, which is normally used to step up the generator
However, in strong winds and storms this switch may be used to slow the generator down, before it is physically turned out of the wind and a blade tied down with a rope. The regulator has been especially produced to be used with an Ampair 300 wind
The use of a permanent magnet generator contributes to lower weight. The turbine will also employ what are claimed to be the longest wind turbine blades ever produced (although, as already noted, the length has not yet been made public) to make best
The core features of the new SWT-2.3-113 wind turbine are its permanent magnet generator and a rotor diameter of 113 metres when fitted with the new Siemens B55 Quantum Blades. This new blade design is lighter than previous models but retains the
How to Build a Wind Generator Using a Delco Alternator | Eco ...
If you have an extra Delco alternator, you may want to consider generating your own electricity via a wind turbine system. Although automobile alternators do not make for the best wind turbines, you can modify the alternator so that it is adjusted for lower revolutions per minute (RPMs), thereby producing more electricity than it would otherwise. There are several variations of renewable -energy systems, ranging from grid-connected systems, battery backup systems and systems connected directly to your circuit breaker box.
Use a tap-and-dye set to drill holes into the gear on the alternator’s drive shaft. Bolt in wind turbine generator blades (Windmax brand recommended) to the gear, which will now be referred to as the blade hub. Spin the turbine’s blades and attach a multimeter set to voltage to the electrodes on the alternator to measure the production of electricity. If it does not produce electricity, you may need to use smaller wires for the alternator coils.
Run the 12-gauge cable to the battery bank, including extra length in the wire for raising the turbine on top of the TV tower. Solder the end of the 12-gauge cable to a blocking diode, which prevents the batteries from turning the turbine. Connect a short length of 12-gauge cable to the output of the blocking diode, then connect the opposite end of the wire to a charge controller. The charge controller helps to regulate the recharge cycles of the battery bank, ensuring the longevity of the batteries.
Use battery cables to connect the deep cycle batteries into a series circuit, which allows the individual voltages of the batteries to be added for total system voltage for your home appliances. Connect opposing terminals in order to achieve the series circuit configuration, linking the positive terminal of one battery to the negative terminal of its adjacent battery.
Connect the positive and negative terminals from a battery to a power inverter, which converts the electricity into Alternating Current (AC), which is used by nearly all home appliances. Different power inverters will have different wiring specifications for their input terminals. Connect an extension cord to your power inverter and use a power strip to access the power from your RE system’s battery bank.
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