Tag: tower

  • Type of towers – stiff, soft or soft soft?

    In the last month I spent a lot of time discussing about “soft soft” towers. But what does it exactly means? Steel tower for wind turbine are classified as stiff, soft, or soft soft based on the relative natural  frequencies of tower, rotor and blades. You obviously want to avoid that your tower is excited…

  • Concrete towers for onshore wind farms: an overview

    Concrete towers are still an uncommon solution nowadays, basically they are still more expensive than they steel counterparts. But the trend we see in the market is toward highest tower, of 100 meters and above, while current 2MW-3MW turbines normally have an hub height around 80 meters: this can lead to situation where an hybrid…

  • Wind turbine tower

    Towers are an important element in the structure of a WTG, not only for structural reasons (they transmit the loads from the nacelle to the foundation) but also for economical reasons: they highest the tower, the biggest the amount of energy produced. For instance, with an increase of 20 meters from the standard 80 meters…