Installation methods vary depending on the turbine supplier and the relative size of turbine and vessel. Typically, the turbine tower is pre-assembled onshore and transported with the nacelle and blades for final assembly offshore. Heavy lift vessels designed for transporting and lifting heavy loads are needed for assembly. Cranes vessels are used to lift the parts into place.
The turbine installation vessel transports the turbine components to site and supports the erection of the turbine on the foundation. Similar jack-up vessels are used to those for foundation installation.
Recent turbine installation on commercial-scale projects to date has normally been undertaken with a self-propelled jack-up vessel designed primarily for the purpose, though in some cases, jack-up barges have been towed with tugs.
GRS assists all clients in finind the right offshore installtion vessel and offshore service provider.