Report identifies technologies that could unlock tidal stream energy

Published by the Offshore Renewable Energy (ORE) Catapult, the Tidal Stream Technology Roadmap report identifies subsea hubs, anchors for floating devices, controllers to optimise lifetime turbine performance, cable monitoring and tidal array optimisation as some of the technologies that could make tidal stream energy cheaper than nuclear energy.

In a statement, Simon Cheeseman, wave and tidal energy sector lead at ORE Catapult, said: “With rising costs and the need to adapt to a varied future renewable energy mix, we have identified key drivers in how tidal energy can reduce UK energy system costs by up to £600m a year and play a full part in the net zero revolution.”

The technology innovations highlighted in the 2024 report support 1GW of tidal stream being installed in the UK by 2035, in line with UK Marine Energy Council (MEC) recommendations.

Sue Barr, Chair of the UK MEC, said: “The UK tidal energy sector has shown a strong pipeline of projects, through the Contracts for Difference scheme rounds four and five. With over 90MW of potential tidal energy projects due to deliver projects across Scotland and Wales in coming years, there is a clear signal that tidal technology is moving towards a commercially viable future.

“Our ambitious UK target of 1GW of installed capacity by 2035 means it is imperative we can define the levers and strategies which can strengthen delivery of tidal stream technology into our energy system.”

In an ‘optimistic’ cost reduction scenario outlined in the report, the innovations were projected to support a reduction in tidal stream cost from the current £259/MWh to £50/MWh by 2035.

The report also highlights that further research and development in technology innovation will fail to secure an accelerated project pipeline for tidal energy without appropriate policy support to boost continued deployment, and private investment to drive commercialisation.

It identifies the need for an increased ringfence for tidal stream energy within the UK government’s Contracts for Difference (CfD) scheme and reforms to the CfD process to recognise non-price benefits generated by renewable energy projects, such as system integration and supply chain development, rather than focusing on lowest price bids.

Sean Parsons, director of external affairs at UK tidal stream developer SAE Renewables, said: “SAE’s MeyGen site is the world’s leading tidal energy site and has provided over 50GWh of clean, predictable power to the electricity system, generated jobs and investment, exported technology and provided a platform to innovate and demonstrate a leading global technology while driving down costs.

“But to deliver the benefits highlighted in the report we need the ongoing support of government to provide a route to market and continue allowing sites around the UK to expand.”