Back to top
Reported by DTU Wind Energy on 26 October 2018

Danish research to strengthen the design of floating wind turbines

With an investment of DKK 15.8 million from the Danish Innovation Fond, researchers from DTU are, in collaboration with leading companies, optimizing the design of the floaters, which makes it possible to place offshore wind turbines on deep waters. 

(Courtesy of DTU Wind Energy)

Offshore wind turbines win more and more terrain on the sea all over the world. This is the case for example at the west coast of the USA, in Japan and in France.

Therefore, development and testing of floating wind turbines is being done in several parts of the world.

In the Norwegian Hywind concept, the wind turbines are placed on a very large floating buoy, which is anchored at a depth of 80 meters and sealed to the bottom of the sea. In another concept, the French Ideol, the floater is designed as a large barge on the water surface.

Several pilot facilities, for example in Scotland, have shown that the floating turbines are functioning just as well as the traditional offshore wind turbines that are firmly anchored at lower waters.
Now, Danish researchers and companies in the project FloatStep are taking the next step on the way to true industrialization of the floating wind turbines. They will optimize the tools and methods used to design and ship the floaters, which serve as ground for the turbines. The aim is amongst others to lower the costs and ease the production of the platforms and adapting the turbines to them.

Optimization of floaters

In the project FloatStep, DTU Wind Energy has gathered leading Danish researchers and companies working with floating wind turbines. The partners of the project will develop and test new and improved calculation models for designing the wind turbine floaters.

“The Danish wind sector was a pioneer for offshore wind energy and has all opportunities to take the lead on floating wind turbines as well. We will contribute to this in FloatStep,” says project manager Henrik Bredmose, who is professor at DTU Wind Energy.

Rune Rubak, who is responsible for Loads and Control in Offshore Technology at Siemens Gamesa Renewable Energy A/S had no doubts about joining FloatStep.

“We want to strengthen our collaboration with the involved partners and sustain our position as leader within the area. This project can contribute to that,” he explains.

The researchers are amongst other things going to develop new engineering models for the calculation of how very powerful waves affect the floater and the moorings holding it in place.

DTU has worked with floating wind turbines for years – in both industrial projects, EU projects and through model tests at DHI. The Danish TetraSpar floater developed by Stiesdal Offshore Technologies is included in FloatStep as an ongoing calculation example. Stiesdal contributes for example with data from the initial full-scale version of the floater.

“We look forward to validate and fine-tune our calculation models in a strong consortium counting both the industry and knowledge-intensive players. Through a combination of model tests, advanced calculations and analyses of full scale data, we will make it all the way around,” says Henrik Bredmose from DTU.

References

[1]

DTU Wind Energy. Press release - Danish research to strengthen the design of floating wind turbines. URL: http://www.dtu.dk/english/news/Nyhed?id=23405BE2-139C-4DB2-9411-D1AB57949294. [Date Accessed: 27/10/2018].

Technology

16 Jan | Design Certificate of 160m Nabralift Self-Erecting Tower awarded by DNV-GL

DNV-GL has awarded Nabrawind with the Design Evaluation Conformity Statement for the first Nabralift Self-Erecting tower design, that was prototyped last summer in Eslava (Spain), with a total hub height of 160m.

Technology

16 Jan | GE's Haliade-X 12 MW prototype to be installed in Rotterdam

  • Agreement signed with Future Wind includes five years of testing and 15 years of service
  • Installation of Haliade-X 12 MW will take place during summer 2019

Technology

15 Jan | Ingeteam is participating in the project for the first offshore wind turbine in Spain

Ingeteam is participating in the first bottom-fixed foundation offshore wind turbine prototype to be installed in Spain and the first of its kind in southern Europe.

Technology

09 Jan | Maxwell Technologies Launches New 3-Volt (3.0V) Platform for Full Range of Market Applications

Innovative Ultracapacitor Cells Offer Highest Energy and Power Yet in Company's Portfolio

29 Jul | Kites harvest energy like wind turbines

Wind energy produced by a kite.

03 Jul | Roskilde Music Festival: Mobile wind turbine version 2.0

The mobile wind turbine can be installed in just a few minutes and charges a battery that will provide electricity for charging mobile phones, camping facilities, and much more.

27 Jun | New European Wind Atlas finalized

During the last four years, researchers from all over Europe have been working on creating a New European Wind Atlas. The results are being presented in Brussels today.

24 May | Two new test stands are ready for wind turbines in Østerild

Last year, the Danish Government decided to expand the Test Center in Østerild with an additional two test stands. It was later on decided, that Siemens Wind Power and Envision should be the two new test stand renters.