The visionary architect behind London's famous observation wheel has unveiled plans for a massive tidal energy project curving in a 14-mile semi-circle off the Somerset shoreline. This groundbreaking scheme seeks to capture the tidal energy to meet soaring energy needs, fueled in part by the expansion in artificial intelligence. Interestingly, the design also includes a novel cycle track that would allow riders to skim over the surface of the Bristol Channel.
The £11bn Vision
Julia Barfield, who also created the Brighton i360, is part of a team that has drawn up the £11bn proposal. The structure would sweep from Minehead to Watchet and employ approximately 125 subsea turbines to produce power from the area's exceptionally high tidal variation.
“If the decision is to proceed with adopting more and more AI – which I am surprised is rarely challenged further during a climate emergency – then it is far better with a clean power source,” stated Barfield. “Data centers could significantly increase energy demand and this is a predictable and reliable source.”
Addressing the AI Energy Crunch
The proposal comes against a backdrop of growing anxiety that the exponential growth in use of artificial intelligence in the UK will escalate carbon emissions unless additional renewable energy sources are developed. The AI boom is expected to compound sharp increases in electricity demand across the nation.
The proposed barrage would not cross the entire width of the Bristol Channel. Instead, it would create a semi-circular structure with a peak capacity of 2.5 gigawatts – comparable to the output of the nearby Hinkley Point C power station. This output would be enough to supply approximately 2m households.
A Multi-Use Landmark
The broader plan goes far beyond power production. It includes a walkway along the crest of the lagoon wall for walkers and cyclists, a water-sports marina, a open-air swimming pool, and an viewing platform. Planners have also floated the idea that datacentres could be installed within the barrage itself, taking advantage of cost-effective cooling from the sea.
Further elements could include shellfish farming, fields of solar panels on the water, and a coastal amphitheatre to revitalize the local economy of the area, which has faced economic challenges in recent years.
Predictable and Long-Lasting
Energy from tides is considered more predictable than wind or solar, despite daily periods when the tide changes. Backers of the Somerset tidal project estimate it would have a lifespan of 120 years, thereby generating power more cost-effectively than nuclear energy over its lifetime.
The scheme was first conceived several years ago with the goal of reducing the UK's carbon footprint. The subsequent AI revolution has created further impetus to the plan, as power needs from datacentres are forecast to rise dramatically in the years ahead.
Navigating Challenges
This latest proposal is the newest in a long line of ideas to utilize the tidal energy of the Severn Estuary. Previous proposals for more extensive structures have raised concerns about environmental impact. The team behind this plan stress that their proposed lagoon would not interfere with shipping channels to the ports of Bristol and Cardiff and is situated away from specially designated conservation zones.
“Minehead and that whole area of West Somerset is an economically challenged region and this initiative will drive regeneration,” Barfield said. “It will create high-quality employment, facilities for water-sports, a lido, a tourist center, an observation tower and arts venues.”
