Sustainable Energy Engineering

VerVent HAWT Concept

Starting points for the VerVent drive train concepts are limiting the number of innovations to a minimum, and reducing technological risks related to new turbine designs as much as possible.

The main philosophy behind the VerVent concepts is to mainly use existing, proven subsystems and components and yet realize significant optimization in wind turbine drivetrain design. The modular approach enables (gradual) capacity increase in parallel to growing track record experience resulting in a low-risk, high-value overall concept.

 Our focus for the HAWT development has therefore been developed to a nominal power range 12-20 MW +

A novel drive train concept for horizontal-axis 2 and 3-bladed wind turbines. Focus at:

  • Rated power range 10-16 MW+.
  • High level of system integration.
  • Builds at existing mature drivetrain and value chains.
  • Risk reduction through limiting main innovations.
  • Minimizing of main components and bearings.
  • Modular product development approach.
  • Optimization through stepwise power rating increment.


 The Route to the MegaTorque 20 Wind Turbine

VerVent's core business is dedicated technology development, with a focus at the offshore wind industry. VerVent worked several years on the development of new geared wind turbine drivetrains, with a specific focus at the gearbox and generator.

In 2013 the first horizontal axis wind turbine drivetrain concept was conceptualized. This VerVent 1.0 version comprised a tower-bottom based generator configuration, focussed on reducing head mass and reducing O&M costs.

All VerVent HAWT-concepts incorporate the bevel-type gearbox being the principal innovation.

Continuous HAWT drivetrain evolution is closely linked to rapid offshore wind turbine scaling, and additional demands for scalability, modular design, head mass reduction (nacelle-rotor, drivetrain, gearbox, generator), enhanced reliability and operating design life.

The illustration shows the development of the design VerVent 2.0 to 3.1 (Megatorque) in volume. VerVent 2.0 was still the generator with two rotors; VerVent Megatorque 3.1 has an advanced gearbox and a "standard" high speed generator. VerVent engineers have succeeded in reducing weight and volume.


Megatorque 20, the outcome of an innovative engineering process

The MegaTorque 20 concept offers a highly compact drivetrain solution with fully integrated patent-pending gearbox design and at least twelve patentable features.

VerVent's IP and patent basis position plus the modular design with high scaling flexibility up to 20MW+, makes the high-capacity MegaTorque 20 drivetrain concept well positioned to meet current and future offshore wind demands.

Visit our dedicated website that will tell you more about our innovative and competitive wind turbine design.


Risk Reduction

For the development of the VerVent HAWT system, from the VerVent 1.0 to the VerVent 3.1 design (the MegaTorque 20) system integration is based on existing technologies. Design elements of the drivetrain include:

Main shaft unit with two pre-loaded taper-roller bearings integrated in a heavy-duty cast housing, a product development originating from German Main Bearing Unit (MBU) specialist Eolotec.

Incorporation of a low-speed coupling originating from Austrian specialist Geisslinger.

From the high-speed generator side the gearbox is protected especially against grid-fault related peak loads via a flexible connection with integrated overload clutch, the latter originating from a German world market leader KTR.

The VerVent gearbox concept is based upon the well-known and proven drivetrain principle of the Germany-based company RENK, constructing gearboxes for many years. 

VerVent offers with its Megatorque 20 turbine concept a drivetrain solution neutral to third-party power electronics location preferences.