Wave energy

The waves in the sea are always moving. For the generation of sustainable electricity, wave energy is therefore a reliable source, which can supply at times when wind and solar energy cannot. The movements of the waves are typically converted into electricity by turbines or hydraulic systems.

Dutch applications of wave energy

In the Netherlands, SBM, Symphony Wave Power, Dutch Wave Power, Weco, OceanGrazer, KM Nielsen and Slowmill, among others, work on wave energy.

Symphony Wave Power's Wave Converter to Energy

The Symphony has an internal spring that resonates to the wave frequency. The generator dampens the wave motion by extracting electrical energy. The Symphony WEC contains two key components: the turbine and a structural membrane.

A 100kW version is being tested in the North Sea with relatively low waves. A next step is to expand the technology to develop a 900kW ocean version.

Symphony Wave Power

The wave energy converter from Dutch wave power

The wave energy converter converts waves into electrical energy. The installation is based on the principle of easy drop & connect. The technology consists of a floating body containing all components for energy conversion, completely sealed off from the salty seawater. The floating body moves with the rotating movement of the waves. This rotation is used to generate sustainable energy.

Dutch wave power

The wave energy converter of
Slow Mill

The Slow Mill consists of a float with blades that are variably connected to an anchor on the seabed. Waves push the float up and the blades away from the anchor. In this way, not only the up and down movement but also the back and forth movement of the waves is used. The blades go deep enough to also get wave power from below the water surface. When the wave retreats, it brings the Slow Mill back to its starting position. The entire unit follows the orbital or sometimes elliptical wave path, but when taking the inside bend it goes slightly slower than the wave, hence the name: Slow Mill.

The wave energy converter of
SBM Offshore

This converter offers direct energy conversion from waves to electricity by applying Electro Active Polymers. The flexible float and mooring system have been successfully tested in a model basin. The first pilot project of this technology is under development.

SBM offshore

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Ocean Grazer places Dutch battery on the seabed

The ocean battery is a scalable, modular solution for energy storage. Energy from wind turbines, floating solar parks or wave energy is stored in it. The system consists of a buried concrete tank full of water and a watertight bag. When there is excess power, a turbine pump system pumps the clean water from the concrete tank under high pressure into the flexible bag. The energy is stored as potential energy in the form of water under high pressure. When there is a demand for power, a reverse process follows. The bag opens, after which the water flows along the turbine blades. In this way, multiple hydro turbines are driven to generate electricity.

Ocean grazer

Slow Mill