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

2.3.3 TerminatorsTerminators are perpendicular to the wave propagating direction. Their lengths are alsocomparable or longer than the wavelengths. Salter’s Duck depicted in Figure 2.3 is anexample of a terminator (Drew, 2009).Figure 2.3 Salter’s Duck (http://www.jeron.je/anglia/learn/sec/science/sn005/page02.htm)2.4 Operating PrinciplesOperating principles include (Drew, 2009):Oscillating Water ColumnsOscillating BodiesOvertopping Devices2.4.1 Oscillating Water ColumnAn oscillating water column (OWC) has two main components a partially submergedcapture chamber and a bidirectional turbine. The rise and fall of the water level increases anddecreases the air pressure. The change in air pressure rotates a turbine sitting above thecapture chamber. A typical shore-based OWC device is presented in Figure 2.4. The Limpetis an example of an OWC device.24