What is the WaveNRG Project?
WaveNRG SAS is pioneering a floating device designed to harness the energy of waves and sea currents, converting it into electrical power. The beauty of this system lies in its simplicity — a straightforward structure that promises rapid development of this innovative technology. The core invention is a wave-tidal floating converter featuring a vertical axis turbine that drives the generator directly. This system cleverly functions both as a tidal energy converter, capturing marine currents caused by tides, and as a wave energy converter, powered by the motion of waves. The turbine’s underwater displacement, caused by the float’s movement along the column, generates mechanical torque, spinning the turbine. This torque is then transmitted straight through a shaft to the electric generator. What’s neat is the turbine blades are shaped to rotate in only one direction, no matter which way the column moves.
Main Benefits and Key Facts
Here’s a quick rundown of what makes WaveNRG’s technology stand out:
- Two versions of the system: one for ocean currents with a power output of 0.8 – 1.2 MW, and another for wave energy producing 100 to 300 kW, depending on wave height.
- Selected in 2019 as one of 34 projects for the MARINET2 program under Horizon 2020, a major European R&D initiative in marine energy.
- Received grant number 731084, granting access to 57 internationally recognized marine energy test facilities across Europe.
- Successful testing conducted in July 2019 at the COAST Ocean Basin, University of Plymouth, England.
- Focus on floating tidal turbine-wave energy converter due to its predictability and competitive electricity pricing compared to offshore wind turbines.
Two Versions, One Float
The technology WaveNRG develops is pretty versatile. It can be implemented in two main versions. First, a wave energy converter that could be a game-changer for hydrogen production via electrolysis — imagine large-scale hydrogen powered by waves! Second, a floating tidal-wave energy converter designed for offshore parks with capacities ranging from 250 to 500 MW. Interestingly, both versions use the same float; the only difference is the length of the vertical axis turbine. This clever design keeps things simple, reducing mechanical complexity and the risk of failure, while also cutting down the system’s overall weight.
Innovative Mechanical Design
One of the standout features of WaveNRG’s system is its mechanical simplicity. The generator sits above the sea surface, which is a smart move. This means all the electrical components and the equipment needed to inject power into the grid come from wind turbine technology of similar power. And here’s the kicker — if something goes wrong, there’s no need to haul the generator up from the seabed. Since the whole system floats, installation costs are lower compared to seabed-mounted devices. This floating design not only makes maintenance easier but also slashes the expenses tied to offshore installation.
Testing and Development Journey
Back in 2019, WaveNRG made a significant leap forward by testing their device at the COAST Ocean Basin in Plymouth. These tests were crucial, confirming the system’s potential and helping the company zero in on the floating tidal turbine-wave energy converter as their primary focus. Why? Because tidal energy is predictable, which is a huge plus when it comes to renewable energy sources. Plus, the electricity generated is expected to be priced competitively with offshore wind power, making it a promising contender in the renewable energy market.
Project Impact on Sustainable Development Goals
- SDG 7: Affordable and Clean Energy – advancing renewable marine energy solutions.
- SDG 9: Industry, Innovation, and Infrastructure – fostering innovative marine energy technology.
- SDG 13: Climate Action – reducing reliance on fossil fuels by harnessing ocean energy.
- SDG 14: Life Below Water – promoting sustainable use of ocean resources.
Looking Ahead: The Future of WaveNRG’s Technology
WaveNRG’s floating tidal-wave energy converters hold exciting promise for the future of offshore renewable energy. With the ability to scale up to large parks producing hundreds of megawatts, this technology could play a key role in the global energy transition. The use of a common float for both wave and tidal versions simplifies production and deployment, while the above-water generator design eases maintenance challenges. As the world pushes for cleaner, more reliable energy sources, WaveNRG’s innovative approach could soon become a vital part of the energy mix, powering communities and industries alike with the endless motion of the sea.
