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.
Kate Freeman and I recently performed an analysis of the main factors contributing to project delays and cost increases. Importantly, we have also analysed the impact of increasing the maximum wind speed – such that lifts can be performed at higher wind speeds. We looked at the potential savings by being able to complete offshore wind turbine installation projects in higher wind speeds. Continue reading
In this second of two exclusive interviews with High Wind Challenge, DEME Group CEO Alain Bernard explains why the company invests in innovation and how it contributes to reducing offshore wind costs.
Can you explain the DEME Group’s basis for diversification, particularly into offshore renewables?
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. We have specialised further in related niches, and without losing the focus of our core knowhow, we have expanded our activities. Continue reading
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.
Difficult weather conditions often lead to significant project delays caused by downtime that extends project time and increases costs.
Of course, weather downtime is an unavoidable part of any installation process and must be figured into project costs alongside all of the different activities required of the jack-up, including mobilisation and demobilisation, loading of the wind turbine elements, transit between the port and the wind farm, positioning and jacking, and installation of the turbine. Continue reading
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.
But in order to fully understand the implications of reducing installation setup costs, it is necessary to perform robust calculations. And these calculations must be based on correct assumptions and figures that are as accurate as possible. Continue reading