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Denmark

Denmark

Gallery: Vestas assembles four-rotor concept

DENMARK: Vestas this week unveiled its 900kW four-rotor wind turbine concept being assembled at a test site in Denmark.

  • The concept turbine's flexible arms are installed on a blue mounting frame

    The concept turbine's flexible arms are installed on a blue mounting frame

  • Each arm of the test turbine has a footbridge from the central technician platform to nacelle

    Each arm of the test turbine has a footbridge from the central technician platform to nacelle

  • On site: one level for two turbines, with arms already connected

    On site: one level for two turbines, with arms already connected

  • Four refurbished V29-225kW turbines will power the prototype

    Four refurbished V29-225kW turbines will power the prototype

  • A nacelle is lifted on to one of the arms ahead of being placed on the tower

    A nacelle is lifted on to one of the arms ahead of being placed on the tower

  • The first twin-rotor unit is mounted atop two conical bottom sections at a height of 29 metres

    The first twin-rotor unit is mounted atop two conical bottom sections at a height of 29 metres

  • The tower spacer between the two layers

    The tower spacer between the two layers

  •  The second unit is mounted at 59.5 metres

    The second unit is mounted at 59.5 metres

  • Final tip height will reach 74 metres

    Final tip height will reach 74 metres

  • The completed concept turbine

    The completed concept turbine

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The prototype is being assembled near Roskilde, eastern Denmark, this week.

Windpower Monthly's technical expert Eize de Vries visited the factory in Nakskov, southern Denmark, and discussed the potential of the concept with Vestas engineers.

The turbine incorporates four refurbished pitch-controlled V29-225kW turbines with unchanged 29-metre rotor diameter.

It features two nacelle operational levels with a cylindrical tower section in between and 30.5-metre height interspacing between the levels. The structure's tip height reaches 74 metres.

The nacelles are mounted separately on left and right side tubular-steel arms. These arms in turn are flexibly attached to a turnable central chassis.

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