Symphony wave power

More info on

The technology

The symphony team

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The symphony is a variable volume, submerged point-absorber. A technology that has proven to be highly efficient in converting energy from the waves

The team behind symphony has a 20 + years of experience in wave energy. They have worked on several technologies since 1994 and are well aware of the changes and threats in the wave energy environment. You can see more on this in THE TEAM.   The patented Symphony technology benefits from this experience. The team was responsible for developing the Archimedes wave swing technology that was tested in Portugal in 2004, and for the development of the test facility, later used by Pelamis and now by Windfloat in Aguçadoura
in North Portugal.

There are two crucial components.

1) is the internal rubber membrane and

2) the special developed symphony water turbine.

These two components are the only moving critical parts. The internal membrane drives the water through the turbine into the high pressure gasspring. The increasing pressure acts as a counterforce and pushes the system (under a wave trough) back. Moving this mass against this spring gives it an “eigen frequency” and makes it behave like a damped mass spring system. A special feature is the shape of  the mebrane-chamber this special shape makes the normally nonlinear behavior of the airspring perfectly linear and give it a high resonating quality. This same shape in the end of the stroke create a very stiff spring, that makes no need for end-stops, a component that has in the past shown to be hard to design.

More info on the technology


Policy of the symphony team.

The amount of wave energy developments have not decreased, and there is a good chance that some technologies will mature to survive, but the history shows many will not. It must be the huge energy source that triggers  investors to support these technologies and the entrepreneurs behind them. The symphony team visions another path. A path in which professionals work to ether to bring the technology stepwise to the market. In this not only TRL count, but performance as well. Performance can be well proven and improved on a reasonable small (affordable) scale. Therefore the technology will be build and than tested in the sheltered deep water area near the Sines harbor in Portugal.
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The team is focusing on building a small device of ca. 1.5 m in dia (ca. 7m high) with all features and measuring equipment and test it extensively, within an R&D program. For this they cooperate with companies and universities. They have received several  EU subsidies already



Within this R&D program critical components will be designed.

This is done under the WETFEET program.




These test should at least be done over several years and will include several optimizations of the device. During this period the Team wants to cooperate with partners that can take this technology through the next stage. A small organization is formed until a go is given for upscaling.

In the mean time there should be an implementation of a governmental financial support systems to make an investment into multi megawatt wave parks worth-while. Given the ambition shown in Paris, wave energy should play a substantial  roll.

Wave energy.


70% of our planet is covered with water. The density is 1000 times higher than air. Pressure levels of just 10 meter of water column equal 100 km of atmosphere. So the fluctuation of these levels represent a dense form of renewable energy. One form of this renewable energy is the wave motion, which is
300px-Wave_motion-i18n-mod.svgcaused by the top layer of the ocean being forced to move through wind and surface-friction. This motion continuous to far under the water surface (up to approx. 100m) and represents a vast renewable energy resource.


The levels of power given are averages of one meter of wave crest with. Wave devices can convert several meters of wave crest width in one device. A “point absorber” like the symphony can even capture the energy equivalent to ca. 30 meters crest width with a relatively small diameter. This creates a theoretical potential of more than 1MW of average average power for one device.

Pico Wave Plant 05 copy

In practice this however is much lower and more in the area of 200 – 500 kW in average, with rated powers up to 1 to 2MW for an operation in high waves. In severe storms, the peak levels of wave power are largely exceeding the average (useful) power levels. Wave energy converters (WECs) usually have a survival mode when incident power levels exceed a certain level (similar to the concept of cut-off speed in wind turbines). The struggle of survivability is demanding, especially for non-submerged devices that have to handle the peak loads caused by waves of up to 25m. Such environmental conditions for example are avoided by ships, and offshore platforms are designed to have deck heights far above the sea surface.

A lot of information about this topic is given on Wikipedia and other sites.




Renewable energy.

solar + moon

energy growth

In the last 100 years we did not only get addicted to energy, we also explored  most of our earth for fossil fuel resources. With the speed we consume our resources, we will consume in less time, 50- 100 years, all resources we explored.
consuming oilApart from the usage we polluted the earth and increase a greenhouse effect. Causing effects on the climate we can not oversee yet.

But…. we also created knowledge and new technologies. There are a huge amount of solutions to power our industries and our homes from renewables,  and even build new Hydro-carbonates from CO2 and hydrogen without using biology so that we can even build new materials.  The technologies are available and although many are still under development there is no reason to panic.

There is however a need for common sense and policy to transfer from a fossil resource to renewable resources.

COPWith the climate conference COP21 in paris 200 countries agreed to work on new targets. To realize these targets much more effort and development is needed.

Lets hope this speeds up our development and creates  a sustainable future.