The NEMOS Wave Energy Converter is an innovative system for generating electricity from ocean waves. The incoming energy is absorbed by an elongated floating body and transmitted to a generator by a spring-loaded belt drive. Performing its motion on a curved trajectory relative to an underwater reaction structure, the systems hydro-mechanical efficiency is far above standard technology. The system can be adjusted in size to different environmental conditions so that energy output is maximized and loads are limited. The design aims for a multi-megawatt array when deployed in energy-rich locations.

The 2019 Wave Energy Converter (WEC) prototype features a 8 x 2 m floater and a 16 m long substructure. The prototype is intended to be deployed in Ostend first, next to the NEMOS research tower that is installed on site to control and surveil the WEC trials. The prototype design marks the latest stage of the NEMOS WEC developments. This evolved standalone floating design does not require a fixed building structure like the initial NEMOS concept and thus can be realized to competitive steel to kilowatt-hour ratio.




Since 2010: Tank tests in research facilities

Comprehensive tank tests are the basis of all NEMOS wave energy development activities. Under controlled conditions, the hydro-mechanical interaction between floater and waves can be investigated in order to improve control algorithms and maximize the harvested energy.


Since 2013: Scaled tests in nearshore environment

The step from tank tests to real environmental conditions is a big one. The NEMOS team challenged its own technology over several years by carrying out scale tests in Denmark`s Limfjord. At 1:10 and 1:5 model scales, the NEMOS system exhibited high efficiency, robustness and automated operation.


Since 2016: Full scale power take-Off tests

To analyze the efficiency of the power conversion path and gain experience in assembling and operating large components, a full scale PTO test bench was installed at the University of Duisburg-Essen. The simulation data verified the theoretical power predictions.

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From 2019: Large scale offshore installation

Currently the team is focussing on the installation of a large scale prototype in the North Sea. With a floater displacing more than 10m³ water and a fully equipped research station on an independent structure nearby, the system will generate enough energy to supply several households with electricity.


Wave Energy: Research

OESA aims to accelerate the development of marine energy technologies through strategic partnerships and international collaboration

The Ocean Energy Scale-up Alliance (OESA) is an accelerator project aiming to develop and deploy large scale marine energy pilots. The transnational partnership under the lead of the Dutch Marine Energy Centre combines expertise from 6 European countries from the North Sea Region.

The following three goals will accommodate a larger number of technology deployments in the future:

1. To develop a transnational scale-up offer for marine energy technologies, in which the services of large European service providers in offshore and marine energy are combined.
2. To accelerate the development of five technologies, leading to the deployment of 20 MW in large scale pilots.
3. To bring together stakeholders from the offshore industry, investment business and policy makers in a stakeholder platform and show the collaborative potential of marine energy in order to secure their support for future deployments in the ocean energy sector.

A strong partnership of international experts

Within OESA, thirteen organisations combine their expertise in offshore engineering, market development, ocean energy testing and technology development. To make sure that the offer is tailored to the most urgent needs of the industry five technology developers are members of the alliance. Together with the eight service providers they are analysing and defining services that will lead to the deployment of their technology pilots.

The eight service partners are combining their expertise to offer a portfolio that covers both technological as well as commercial services. This will not only lead to the immediate acceleration of pilot development but also ensure the sustainable growth of technology companies.

Through its transnational collaboration OESA strives to strengthen the ocean energy sector. This will allow to share lessons learned and lead to the faster production of more renewable energy in the North Sea region.

Visit for more information on the project and collaboration opportunities.