How to transport and install 700 offshore wind turbines

Naval Architect students have shown that one way of transporting and installing 700 offshore wind turbines with gravity foundations is sinkable barges using ballast to move a large load vertically; another possible solution is heavy-lift ship using winches to lower the cargo.

 

Jennifer Ringsby and Lisa Dahlström, Naval Architect students at Chalmers.

The Marine Design Project of 2014 enables students to propose a conceptual design of a ship or offshore structure for a real customer. The task of moving 700 offshore wind turbines with gravity foundations around 20 nautical miles, from the port of Karlshamn in Blekinge to Hanö, was initiated by Offshore Väst and Blekinge Offshore and given to students in the master´s programme Naval Architect and Ocean Engineering at Chalmers University. Last week the students met the industry to receive feedback on their projects.

The idea of using ballast to move a large load vertically was presented as a potential way to transport and install the wind turbines and gravity foundations. By attaching the foundation or windmill to a floating U-shaped fixture and connecting another ship, the foundation will be able to be transported the 20 nautical miles. In order to install windmills, ballast water will be used to alter the U-shape.

The second suggestion includes heavy-lift ship using winches to lower the cargo. A partly submersed ship shall according to the students be used for the transportation of the windmill and foundation.

During the seminar, customers, teachers, doctoral students and external experts participated and gave advises as well as compliments to the students. According to Blekinge Offshore, the Marine Design Project of 2014 showed the great capacity of the Naval Architect students.

- I am very impressed by the students work, said Anders Nilsson, CEO of Blekinge Offshore.

The final presentation will be held 19 December.