Eco wave power in Gibraltar

An isometry view of EWP's Gibraltar plant An isometry view of EWP's Gibraltar plant

Eco Wave Power (EWP) is an Israeli company that has developed a unique form of electricity generation using wave power. Rather than have a wave generator moored in the open ocean where complex moorings and connection systems are required, the EWP system utilises existing land structures as the attachment point which the company claims greatly simplifies the installation and durability of the wave generation system.

The company has two of its wave generation systems operating in Israel and now has the go-ahead for an installation in Gibraltar. This Gibraltar installation will be attached to the existing Ammunition Pier in the harbour which is exposed to waves from the open sea but the generation and distribution part of the installation is on the dry land of the pier which is claimed to make it more reliable and durable.

The EWP converters draw energy from wave power through uniquely shaped hinged floats. These are hinged to the breakwater wall and they will rise and fall with the up and down motion of the waves. This rising and falling is translated into hydraulic power via the telescopic cylinders that are attached to the top of the floats and this hydraulic power is taken via piping to the hydraulic motor in the control station which in turn is used to turn the generator.

EWP claims that the secret of its wave generator design lies in the unique shape of the floats. These are shaped in a curved L-shape with the top of the float roughly level with the water surface. The approaching waves are then deflected downwards by the curve of the float which is what generates the lifting force on the float which is then converted into hydraulic power.

EWP has designed two types of wave generator, the Wave Clapper and the Power Wing. The Wave Clapper comprises individual floats with space between them and this is the type that will be installed in Gibraltar. The Power Wing comprises a longer series of floats which are hinged individually but which tend to work in unison because of the minimal gaps between the floats but which can adapt to the changing wave shapes.

The floats are fully equipped with sensors which continuously monitor the performance of the various subsystems and the surrounding ocean environment. This data is transmitted to shore in real time and in the event of upcoming storms, the system automatically recognizes the type of waves being generated, and independently decides whether to raise the floats above the water level, or to create a process of float submersion into the water in order to protect the system from mechanical stress. When the wave heights return to normal, the system unlocks and recommences energy conversion and transmission of the electrical power ashore.

EWP claims that one of the clear advantages of its system is that only the floats and pistons are located in the water with all the technical equipment operating on land, thereby improving reliability and providing easy access for maintenance and repair. The floats can be attached by robust arms to any type of structure, such as breakwaters, piers, poles, and floating and fixed platforms. The Gibraltar installation will comprise just four floats in the initial installation but more can be added later. For large scale commercial size wave power plants up to 100 floats can be installed.

By Dag Pike

Latest Press Releases

DLM Design and Manufacture new Detrenching Grapnel

Dynamic Load Monitoring, specialists in the design and manufacture of Load Cell’s and Cable Working ... Read more

Marine Accessories Offers Superior Performance

Dixon is a premier manufacturer and supplier of marine fluid transfer products for a wide range of a... Read more

Caspian Offshore Construction takes swift delivery of Damen Stan Tug 1606 ICE

Caspian Offshore Construction has recently taken delivery of a Damen Stan Tug 1606 ICE class in Kaza... Read more

Third S. T. Marine Support Multi Cat names at Damen Shipyards Hardinxveld

On 2nd August, Damen Shipyards Hardinxveld hosted a naming ceremony for S. T. Marine Support’s new M... Read more

Damen signs milestone pontoon order

Damen Shipyards Group has recently signed a contract for the delivery of a pontoon to France-based c... Read more

Damen installs solar panels at Dutch shipyards

As part of its ongoing commitment to sustainability, Damen Shipyards Group is having solar panels in... Read more

View all