Energy

Megawatt-scale wave energy project inches closer to realization

Megawatt-scale wave energy project inches closer to realization
The first megawatt-scale EWP wave energy station is to be built in the city of Porto, in northern Portugal
The first megawatt-scale EWP wave energy station is to be built in the city of Porto, in northern Portugal
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The first megawatt-scale EWP wave energy station is to be built in the city of Porto, in northern Portugal
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The first megawatt-scale EWP wave energy station is to be built in the city of Porto, in northern Portugal
Eco Wave Power's Porto station will also host a wave energy museum and education center
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Eco Wave Power's Porto station will also host a wave energy museum and education center
EWP founder and CEO Inn Bravermann (left) discussing plans for the installation of Porto's wave energy station, along with a wave energy museum and education center in the space underneath the breakwater
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EWP founder and CEO Inn Bravermann (left) discussing plans for the installation of Porto's wave energy station, along with a wave energy museum and education center in the space underneath the breakwater
Graphic showing how Eco Wave Power's system works
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Graphic showing how Eco Wave Power's system works
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Eco Wave Power has been floating its wave energy system for more than 10 years, where the rise and fall of coastal waters drives hydraulic pistons that run a generator to produce electricity. Now the company is getting ready to build its first megawatt installation.

We've been following the progress of Eco Wave Power's journey to tap into the movement of coastal waters and generate electricity since early prototypes were tested in tanks back in 2012.

Though the system has been through a number of tweaks over the years, the basics are still the same. Floaters attached to a sea wall or other coastal infrastructure rise and fall with the motion of waves, which moves fluid to a land-based accumulator via the action of hydraulic pistons. Compressed hydraulic fluid is then released and drives an electric generator to produce electricity.

Graphic showing how Eco Wave Power's system works
Graphic showing how Eco Wave Power's system works

The setup can operate around the clock, but if conditions get too choppy the floats can be raised until the storm passes. Installation and maintenance should be relatively simple, and connection to power grids can be undertaken without laying miles of undersea cabling.

Gibraltar became the first grid-connected Eco Wave Power setup in 2016, which ran for six years before its component parts were recovered, overhauled (or recycled) and shipped to the Port of Los Angeles in the US for a demonstration project. Another installation at Jaffa Port in Israel was connected to the grid last year. The company has inked a number of deals around the world in recent years, the largest for a 77-MW wave energy station in Turkey.

However, the honors for the first megawatt-scale project to be built looks set to go to the city of Porto in northern Portugal. Though announced back in 2020, approval for construction to commence was only granted in March of this year. Now Eco Wave Power founder and CEO, Inna Bravermann, and company engineers have met with key players "for the official kickoff" of its first commercial-sized project.

Eco Wave Power's Porto station will also host a wave energy museum and education center
Eco Wave Power's Porto station will also host a wave energy museum and education center

The site of the first 1-MW station will also host a "first-of-its-kind wave energy museum and education center" in the space underneath the breakwater, which will be open to the public. This space will house much of the Eco Wave Power's equipment as well. Construction is expected to begin within the next two years, followed by expansion over four locations up to a maximum capacity of 20 megawatts.

"We believe that this will be the first wave energy project in the world to show significant energy production from the power of the waves," said Bravermann. "I truly believe that this revolutionary project will position Eco Wave Power as a leading wave energy developer and serve as a significant milestone towards the commercialization of our wave energy technology globally."

Source: Eco Wave Power

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9 comments
9 comments
notarichman
How are all the submersed parts cleaned? barnacles, etc.?
Rick O
I've been a fan of Eco Wave ever since I saw the first article about them, on this site. It's a straightforward system that looks easy to maintain with proven technology. There are lots of coastlines not suitable for recreation where these can be placed, with minimal visual impact. Wave power is near constant, and if placed properly, they can help with soil erosion and protection of coastlines. Seems like a win win.
pete-y
visual impact is negligible but capital cost looks high .
guzmanchinky
Best idea ever, the amount of energy is endless. The ONLY bump I could see is mechanical systems and saltwater and wear, but I'm sure they have engineers smarter than I am at their company who have probably thought of the same thing... :)
Nelson
I wonder how much sea life this thing will exterminate?
dave be
The diagram presented is a bit wrong in its presentation. Granted that diagram IS on the projects own website so it isn't the fault of the article writer other than not catching this detail.

Step 2 talks about 'compressing t hydraulic fluid'. This isn't what happens, as hydraulic fluid is as in-compressible as possible. Thats what allows it to be used to project force over distance. The more compressible it is the less efficient that system is.

What does happen is the fluid is moved by the piston into the accumulator. That accumulator stores the incoming force by compressing something else, be it gas, or springs, or displacing water, or whatever the design of that accumulator uses. That force is then pushed back into the fluid as it 'escapes' through the hydraulic motor.
Chec78
Yes, just like Dave be said, I caught that mistake about fluids unable to be compressed too, Otherwise, hydraulic jacks and heavy rquipment that use hydraulic motors and pistons wouldn't work!
windykites
How do you compress hydraulic fluid?
I first thought this a tidal device, but that is not involved here. There is a massive amount of infrastructure.
There are days when the sea is calm, so power is intermittent, like wind and solar. You still need baseload power.
ljaques
This is the best style of wave power generation I've seen yet. No gears to wear out and cause high volume sound transmission for miles underwater. Easily cleanable floats. Just disconnect the pin leading to the mechanics and lift it out of the water. Low visibility. Low comparative costs. It has the highest reliability of power source. And the best part is that it will likely exterminate ALL sea life in all oceans in only five minutes! (Oops, Nel. I meant to say "zero".) Send feedback to Eco to rephrase Step 2 to say "putting pressure on the hydraulic fluid."