MS Thesis R. Hager - Hawaii National Marine Renewable Energy ...

TautSlack2.6.1 RigidA rigid mooring system is embedded into the ground or shoreline. A rigid mooring system isrequired when the motion of the WEC device is statically coupled to the seabed (Price,2009). Examples include the Limpet, Archimedes Wave Swing, and the Aquamine PowerOyster.2.6.2 TautA taut mooring system uses an elastic but tightly stretched connection. It is used when thedevice does not need to move, but cannot be fixed to the bottom of the sea. A taut mooringsystem is required when the WEC device is dynamically coupled to the seabed (Price, 2009).The Wave Dragon is an example of a tautly moored device.2.6.3 SlackA slack-mooring system maintains the device’s station, but allows for the device to move. Aslack-mooring system is required when the means of reaction is either referenced or inertial(Price, 2009). Often these mooring systems are associated with offshore devices (Price,2009). An example of a slack-mooring system is Pelamis.2.7 Power Take-Off System (P.T.O.)Power take-off systems transfer the wave’s mechanical energy to electrical energy. Powertake-off system classifications include (Drew, 2009):Hydraulic System28