This thesis describes the design of a buoy equipped with a tidal compensation system
for wave energy conversion: the buoy is a part of the wave power unit developed by
Uppsala University. The motion of the buoy at the surface is transmitted with a wire
to a linear generator at the seabed that produces electricity. The length of the wire,
the so called connection line, has to be adjusted according to the tidal level at the site,
hence, a compensation system will be integrated to the buoy. The work carried out
within this thesis results in a complete manufacturing documentation of the new
generation buoy to be able to order a prototype.
After reviewing the material written on this subject, ideas and concepts were
developed, and the advantages and disadvantages of each of them were highlighted. A
concept was chosen with the help of an evaluation matrix and conversations with my
supervisor and customer. The selected concept was studied in more detail and
drawings were produced. The concept is based on the buoy currently used by
Seabased AB integrated with the tidal compensation system.
The result is a modified existing buoy with the ability to contain the existing tidal
compensator in a waterproof environment. The tidal compensator is placed in a box
held by three beams leaning toward the center of the buoy. The buoy is built and
analyzed in a CAD-program called SolidWorks, to make sure it can withstand the
forces applied on it. The result shown in the thesis meets the objectives and the
requirements that were set together with the supervisor at the beginning of the
work. Some ideas for improvements and further development work are presented at
the end of this report.