Technology

The concept

The Langlee wave power converter concept is revolutionary - capturing maximum wave energy, which is concentrated just below the sea's surface. Nevertheless, Langlee system components use proven, Norwegian offshore technologies and construction standards.

Sea waves move the hinged water wings of each submerged Langlee module, analogous to the way sound waves move the diaphragm of a microphone. Energy absorbed from wave motion by the moving water wings drives a hydraulic system, which powers electric generators.

The array of Langlee power converter modules floats, for best energy capture; wave energy is highest just beneath the water surface. The Langlee system is anchored to the seabed. Each Langlee module has two pair of water wings, located one-half wavelength apart, move in opposing directions as waves pass through the Langlee array.

Reliability

Operating just beneath the water surface, the Langlee system is sheltered from damage during heavy storms, yet remains positioned where wave-energy conversion has its greatest potential.

Only the top of each Langlee module’s four steel buoyancy tubes is exposed to the splash zone.

The Langlee design is simple. The system features a minimum number of moving parts, and no complex components are exposed to seawater. The system relies on proven technology and standard components.

Survivability

Under extreme wave conditions, the hydraulic pressure generated within Langlee modules is automatically reduced, limiting structural and component stress. The rotating motion of module panels is not limited by stops; the hinged water wings can rotate 360° (buoyancy returns the panels to their upright position).