Tidal Lagoon Power is a British company that has proposed the creation of an ambitious network of artificial lagoons along the UK coast. The main aim of the project is to take advantage of the Seawater energy, a renewable energy source generated by the movement of the tides. With this network, the company hopes to cover a significant part of the country's energy demand.
The use of Seawater energy It is not a surprise in the United Kingdom, whose coasts experience large variations in sea levels due to tides. One of the main projects already underway is the Swansea Bay, in Wales, where the first of these artificial lagoons could supply energy to more than 150,000 homes.
Why did you opt for artificial lagoons and tidal energy?
One of the prominent reasons for betting on tidal energy instead of wind energy is the density of water compared to air. Sea water is 832 times denser than air, meaning that an ocean current of just 5 knots has more kinetic energy than a 350 km/h wind. This natural property of water means that offshore turbines can generate energy more efficiently and in a smaller footprint compared to wind turbines.
For those of you unfamiliar with speed in knots, 1 knot corresponds approximately to 1,85 km/h, that is, a 5 knot sea current has a speed of about 9,26 km/h, which is much smaller than that of wind turbines, but with the potential to generate much more energy.
In addition, another advantage is that the tidal turbines They are smaller and have a simple operationAs tidal water flows through the turbines, they spin to generate electricity, which is transported to land via undersea cables.
The beginnings and first steps
The great project of Tidal Lagoon Power will begin with a test in the Swansea Bay, Wales. The waters of this bay are known for their high tidal amplitudes, making it an ideal location to test this technology.
This pilot project will include the construction of a 9,5 km long wall, which will surround an artificial lagoon of 11.5 km². In this lagoon around 1000 people will be installed 30 turbines, each with a diameter of 7,35 metersThe turbines have a bi-directional design that will allow energy to be generated both when the tides are rising and when they are falling, ensuring continuous operation for almost 14 daily hours.
This first project has the capacity to provide energy to 155,000 homes over the next 120 years. Once completed, this Swansea facility could be the model for five other UK sites to follow, including Cardiff, Newport, Bridgwater, Somerset, West Cumbria and Colwyn Bay in Wales and England.
If all the projects materialize, the UK could achieve a supply of up to 8% of its total energy demand through this source. This figure is significant and demonstrates the great potential of tidal energy compared to other renewable sources.
Environmental and technological benefits
One of the biggest arguments in favor of this type of installation is its contribution to reducing carbon emissionsAs the UK is committed to reducing its carbon footprint, these tidal plants represent a clean and consistent source of electricity.
In addition, the structure of the lagoons could serve as a barrier for flood prevention and sea level rises, which would bring a double benefit. Similarly, the predictability of tides allows for more precise calculations of energy production levels, reducing dependence on more unstable sources such as wind or solar radiation.
Environmental impact and challenges
Although the project has received great support, there are concerns regarding its environmental impactThe construction of artificial lagoons, which involves the creation of barriers of more than 20 km in some areas, could have adverse effects on biodiversity and marine ecosystems.
Some opponents argue that these barriers will alter the natural flow of tides and could affect marine wildlife, especially species that depend on these flows for migration or feeding. The need for rigorous environmental impact studies before proceeding with large-scale construction has been raised.
Another criticism is the financial cost of the project. It is estimated that the first lagoon in Swansea could cost around 1.200 million euros, which would increase British household bills by around £34 a year for the next 120 years.
However, proponents of the project argue that while the initial cost is high, in the long term it will be more than offset by a reduced need to import fossil fuels and lower energy prices for future generations.
Ultimately, the key will be to find a balance between maximizing energy benefits and minimizing the environmental and financial risks associated with the project.
The development of this system of artificial lagoons in the United Kingdom represents a firm step towards a more sustainable future, although it will not be without its challenges. The initial tests and studies in Swansea will be decisive in defining the direction that this innovative venture into tidal energy will take.