Vattenfall has awarded Siemens Energy an order for 72 Model SWT-4.0-130 wind turbines for its new Sandbank offshore wind farm. The project is being erected 90 kilometers west of the island of Sylt in water depths between 25 and 37 meters within the exclusive economic zone off the German North Sea coast.
A service plan for the project will benefit from its close vicinity to DanTysk offshore wind farm, using joint operations to drive down the maintenance costs of both projects. Vattenfall has contracted Siemens to perform maintenance services on the Sandbank installations for an initial period of five years.
The 72 offshore wind turbines of the type SWT-4.0-130 for Sandbank offshore wind power plant will be rated at 4 MW each.
Service operations will center on a service operation vessel (SOV) specially designed for these deployments. Following project commissioning, this specialized ship fitted with living accommodations for technicians and a workshop equipped with spare parts on board will take up position between the two wind farms.
A helicopter will provide additional deployment readiness to enable crew to be ferried between land, the SOV and the wind turbines, irrespective of weather and sea conditions. DanTysk wind farm, already in an advanced stage of construction and likewise equipped with Siemens wind turbines of the G4 product platform, lies only 20 kilometers away.
The permanent deployment readiness of the SOV and its use to both wind farms will enable particularly efficient operation owing to the short journey distances and high availability of both wind farms.