Abstract
TETRA Wave Power is a conceptual new wave energy converter, which is based on a geometric structure that provides both strength and flexibility. With its modular and enclosed design, we believe it will overcome several of the disadvantages of the prior art for extracting the energy in ocean waves.
Øyvind Haaheim is the inventor of the concept, and the development has so far been performed by Øyvind and Helene Haaheim from their start-up company based in Norway.
The wave energy converter is named TETRA Wave Power due to the tetrahedrons which are the building blocks of the structure. Each tetrahedron module is extended by four linear actuators, similar to how carbon atoms are arranged in a diamond. 30 tetrahedrons are interconnected at pivot joints to form a symmetrical compliant frame structure, geometrically optimal for distributing axial forces from any direction, also for irregular sea.
An outer flexible membrane supports and encloses the compliant frame structure thereby defining an inner air filled volume and providing buoyancy to the WEC, which will be semi-submerged in water. The linear actuators will generate power by being respectively compressed and elongated, when the floating compliant vessel is deformed, changing the relative positions of the pivot joints. Power circuits are arranged within the inner space, connected to the linear generators to receive the power output. The compliant vessel is deformed by the waves acting on the outer flexible membrane between a steady-state condition wherein the linear actuators are in neutral positions and a deformed condition wherein at least some of the linear actuators are compressed or elongated. TETRA Wave Power can be located offshore or near shore.