Content created for the Renewable electricity sector
A number of years ago, it was normal practice for offshore contractors to win major offshore wind turbine installation projects using non-propelled jack-up barges supported by tugboats and anchors for positioning. This was the established way – it was safe, reliable and efficient.
Maximum wind speeds have a significant influence on costs and time required for offshore wind turbine installation projects. The maximum wind speed is the speed at which it is no longer possible to lift major turbine components (nacelle, tower and blades) by a jack-up vessel. The restricting factors are crew safety and equipment damage due to instability of the load during the hoist.
The essence is our speciality within certain niches and that we aim to be the best in those niches. Our dredging background has given us knowhow within different areas, such as the seabed, sea conditions and other marine environment factors as well as the associated technologies.
In an exclusive interview with High Wind Challenge, DEME Group CEO Alain Bernard, explains why innovation is needed for the offshore wind industry to advance and that true innovation will only happen with greater collaboration across the industry.
Recent advancements in technology can bring about a long-awaited positive development in the offshore wind industry: reducing weather risk associated with offshore wind turbine installation.
The cost of the wind turbine installation setup is an important factor in the quest to reduce the levelised cost of energy (LCOE). Research and development within new technologies is key to making installation quicker, more reliable and safer.
The installation of offshore wind turbine components has traditionally been limited by metocean factors such as spudcan impact during jacking, crane dynamic amplification factors and, of course, wind effects.
As the offshore wind industry continues gaining in maturity, with more investment commitments across Europe, risk mitigation is becoming an increasingly important area for developers and investors.
BVG Associates has recently analysed the effects of increasing the wind speed limit for turbine component lifts. The results of this analysis are described in detail in a new report, “Impact of the Boom Lock tool on offshore wind cost of energy”.
To improve profitability, offshore wind farms are moving further offshore and significantly growing in size. The latest example is the 1200 MW Hornsea project, located 120 kilometres off the UK coast with more than 170 turbines.