Technology

 Triblade summary

  • Triblade is multiple patent pending technology.
  • Up to 80 % mass reduction using the same material as in standard blades.
    • A 65 m long standard blade that weighs 20 tonnes would then be reduced to merely 4 tonnes using Triblade technology.
  • Possibility to make blades much longer than today.
    • A 250 m diameter Triblade rotor will produce 20 MW or more. Such large turbines do not yet exist.
  • Modular design that allows for production and transportation in parts and assembling on site. Simplifies production, transport and installation.
  • Reduce blade cost by up to 60 %.
    • Less material used.
    • Automated/streamlined production.
    • Transport in modules to reduce logistic cost

Pilot installation

  • Triblade has been tested under real conditions at a test facility in Denmark, where a Triblade rotor was installed on test turbine.
  • The rotor diameter was 7.4 m.
  • The test showed that the technology work as expected and is a proof-of-concept for Triblade technology.
  • The noise level was moderate, considering that the prototype is not in any way optimized for low noise emissions.
  • Test results of power production are in accordance with simulations.

 

winfoor_snurra

Triblade pilot installation.

 

 

The concept

Triblade solves the economic viability problem that arises from increasing the length of current turbine blades. The new technology will facilitate the production of much lighter and longer blades (up to the double), which is desirable since the power output of a given turbine increases in proportion to the square of the blade length. Wind turbines will therefore offer significantly more power output the longer the blades get, and by using a single large turbine instead of several smaller ones, maintenance costs will be reduced. Furthermore, the introduction of a modular design will allow easier transportation and installation, which may also give access to sites that were previously inaccessible. In addition, Triblade will be very suitable for automated manufacture as it is made up by many standard components that need to be produced in large numbers, and consequently, it will be possible to manufacture the blade efficiently and at low cost.

Triblade has the potential to significantly alter the economics and scale of wind power, playing an important role in increasing the installed base worldwide and driving the next generation of larger, more efficient wind turbines.

Truss based technology

Triblade is a 3-in-1-blade built as a 3D framework. The technology is designed for a horizontal axis wind turbines (HAWT) and it is suitable for the large-scale wind turbine segment (2.5 – 8 MW). Instead of a traditional single rotor blade, Triblade has three parallel blades that are connected by a supporting structure. The three parallel blades have an airfoil shape and generate the aerodynamic force that drives the rotor.

The solution is based on a novel design, where each blade is constructed as a composite material truss (CMT). Trusses are often used in a broad range of large-span structures, such as, bridges and supporting roof beams. They have an optimal mechanical action since its members are mainly subjected to pure tension or compression, which results in structures having high stiffness and strength. Composite materials can be made with a very high strength to weight ratio and by combining it with truss structures very lightweight large-span structures can be produced. Furthermore, as Triblade is design as truss, and truss consists of members connected by joints, we have started to study a modular concept design. Modular Triblade will be constructed through successive addition of members connected by joints to form larger modules that are thereafter connected by joints to form the complete Triblade. Based on its material composition and structural design, in particular the modularity, Triblade is a ground-breaking technology, which has several advantages when compared with the current market offerings.

Screen Shot 2016-05-11 at 12.07.17