Wave Dragon is a large offshore wave energy converter of the over-topping type; a floating hydro-electric dam and represents state of the art technology within the field of wave energy converters. The heart of the unit is a large floating reservoir. Two reflector wings concentrate the power of oncoming waves, which pass up a curved ramp and into the reservoir. The water returns back to sea through a battery of low-head turbines.
A large scale prototype launched in 2003 was the world’s first offshore grid-connected wave energy device. This test unit has supplied electricity to the grid in more than 20,000 hours – a world record. A 7 MW demonstration project is currently being applied for in Wales, and preparations are underway for a 50 MW array in Portugal.
The key to Wave Dragon’s success is its high power production combined with a long lifetime of low operation and maintenance costs. Wave Dragon has 1.5 to 12 MW of capacity, depending on the local wave climate. A Wave Dragon power station is an array of individual units connected to shore by undersea transmission cables like offshore wind farms. Deployment sites will typically be 5 – 25 km offshore at more than 20 meters depth, to exploit high power wave resources. Wave Dragon has very little environmental impact. The height being less than 7m makes it in many cases invinsible from shore.
The Wave Dragon is a floating overtopping device designed for water depths of 20 m and deeper. The central, front face of the device is a doubly-curved ramp, up which incoming waves surge (as on a beach). Behind the crest of the ramp lies a reservoir that gathers the water that overtops the ramp. Energy […]