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Oscillating water columns (OWCs) are a type of wave energy converter [1] that harness energy from the oscillation of the seawater inside a chamber or hollow caused by the action of waves. OWCs have shown promise as a renewable energy source with low environmental impact.
Oscillating water column: 2011–date Lifetime generation of over 3 GWh by the end of 2023. [18] Ocean RusEnergy [19] Russia Yekaterinburg: N Small-scale 2013 Pico Wave Power Plant [20] Portugal: 0.4: Oscillating water column: 2010 Runde Demo Site [21] Norway: 0.1: Oscillating water column: 2017 SDE Sea Waves Power Plant [22] Israel
It was developed for use in Oscillating Water Column wave power plants, in which a rising and falling water surface moving in an air compression chamber produces an oscillating air current. The use of this bidirectional turbine avoids the need to rectify the air stream by delicate and expensive check valve systems.
Islay LIMPET was a shoreline device using an Oscillating Water Column to drive air in and out of a pressure chamber through a Wells self-rectifying turbine. [1] [6] [7] The chamber of the LIMPET was an inclined concrete tube, with three sections each 6m by 6m.
Oscillating Water Columns (OWCs) are simple constructions that act like a piston and cylinder. As waves rise within the OWC, it replicates the action of a piston, driving a column of air ahead of it and through the turbine. Most turbines are designed to function with a constant flow in a single direction but OWC generates a bi-directional flow.
The Mutriku plant was built by Ente Vasco de la Energía, using oscillating water column (OWC) technology from Voith Hydro.After the design for the Mutriku breakwater was completed in 2005, the Basque government's Department of Transport and Public Works asked EVE to design a wave power plant integrated into the breakwater.
Yoshio Masuda (died 2009) was a Japanese naval commander regarded as the father of modern wave power technology. [1] Among other devices, the now-used principle of oscillating water column is regarded as his invention.
In 2000, Wavegen became the first company in the world to connect a commercial scale wave energy device to the grid on the Scottish island of Islay. [2] The LIMPET (Land Installed Marine Powered Energy Transformer) is a shoreline device which produces power from an oscillating water column.