IN DEPTH: How Vestas' 7MW giant became an 8MW monster

Eighteen months after Vestas unveiled its 7MW V164 wind turbine as “the new ruler at sea”, the Danish manufacturing giant has raised the bar again — by upping the unit’s capacity to 8MW.

The two versions of the turbine are to all appearances the same. At the heart of the design, the drivetrain remains a three-stage medium-speed geared system that steps up the ten to 12 revolutions per minute (rpm) of the rotor to 400rpm inside the liquid-cooled permanent-magnet generator.

But fine-tuning, according to chief technology officer Anders Vedel, has led to a higher-output version of the machine “that will offer lower cost of energy without sacrificing the reliability or structural integrity” of the original design. Plans remain on track to have the first model Log in to read complete article.

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