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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.
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.
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 appears that this was the first oscillating water-column type of wave-energy device. [10] From 1855 to 1973 there were 340 patents filed in the UK alone. [8] Modern pursuit of wave energy was pioneered by Yoshio Masuda's 1940s experiments. [11] He tested various concepts, constructing hundreds of units used to power navigation lights.
The New York City Police Department released these images of “a person of interest” in the killing of UnitedHealthcare CEO Brian Thompson.
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.