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Design limits and solutions for very large wind turbines

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2008<br />

250 m Ø<br />

160 m Ø<br />

Rotor diameter (m)<br />

112 m Ø<br />

126 m Ø<br />

126 m Ø<br />

?<br />

Airbus A380<br />

wing span<br />

80m<br />

15 m Ø<br />

'85 '87 '89 '91 '93 '95 '97 '99 '01 '03 '05 '10 ? 1 ST year of operation<br />

.05 .3 .5 1.3 1.6 2 4.5 5 7.5 8/10 rated capacity (MW)<br />

An innovation accelerator was required that could set<br />

clear pathways <strong>for</strong> future development <strong>and</strong> rapidly<br />

transfer technological advances to the market. In order<br />

to shape such a vehicle, the <strong>wind</strong> industry created<br />

what was known as a ‘ Wind Energy Thematic Network ’<br />

(WEN), an initiative supported as a project by the European<br />

Commission. Through an extended consultation<br />

process, WEN identified the key innovation areas <strong>and</strong><br />

put <strong>for</strong>ward recommendations to address the declining<br />

public R&D funding in the <strong>wind</strong> energy sector. The<br />

WEN placed <strong>wind</strong> energy innovation in the context of<br />

the newly adopted Lisbon strategy <strong>for</strong> the first time 7 :<br />

<strong>wind</strong> energy was identified as being able to improve<br />

European competitiveness.<br />

In 2005 WEN published a roadmap <strong>for</strong> innovation, which<br />

was the first Strategic Research Agenda <strong>for</strong> the <strong>wind</strong><br />

energy sector. This document was used as a basis <strong>for</strong><br />

the European Wind Energy Technology Plat<strong>for</strong>m. TPWind<br />

updated the Strategic Research Agenda <strong>and</strong> developed<br />

an industry-led master plan with a total R&D budget of<br />

€6 billion up to 2020: the European Wind Industrial Initiative<br />

(EWI). The recently created European Energy Research<br />

Alliance (EERA) rein<strong>for</strong>ces this trend by putting<br />

more emphasis on long-term research. The UpWind proposal<br />

<strong>and</strong> consortium, financed by the European Commission<br />

under the sixth Framework Programme (FP6),<br />

was developed in parallel with the creation of the Technology<br />

Plat<strong>for</strong>m by the sector involving individual key<br />

institutions <strong>and</strong> companies with the European Academy<br />

of Wind Energy (EAWE) <strong>and</strong> the European Wind Energy<br />

Association (EWEA) as essential catalysers. Building on<br />

UpWind‘s achievements, EERA <strong>and</strong> EWI together cover<br />

the main road of designing the European <strong>wind</strong> energy<br />

technology of the future <strong>and</strong> helping to meet the EU‘s<br />

2020 renewable energy targets, <strong>and</strong> beyond.<br />

7<br />

One objective was a level of spending of 3% of the EU GDP in R&D in 2010. The Lisbon objective was not achieved,<br />

<strong>and</strong> the strategy was relaunched through the recent Europe 2020 strategy.<br />

<strong>Design</strong> <strong>limits</strong> <strong>and</strong> <strong>solutions</strong> <strong>for</strong> <strong>very</strong> <strong>large</strong> <strong>wind</strong> <strong>turbines</strong><br />

17

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