News Towers: Concrete challenges steel
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Towers: Concrete challenges steel
Saturday, 01 September 2012 00:00
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Steel has become accepted as the ideal material for constructing tubular towers to support wind turbine nacelles and blades. So why are some manufacturers now begining to pay more attention to concrete as a realistic alternative?

The simple answer lies in the greater heights above ground level at which wind farm developers are looking to locate their turbine hubs, either to gain advantage from the higher wind speeds there or to rise above obstructions such as dense forests. “If you have a very high tower you will have quite substantial bending moments at its base,” says Christian Hinsch of German renewable development company JUWI. “For steel that means it will need to have a very large diameter, which is not easy either to manufacture or transport.

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Medio: Wind Directions