Tidal Energy Limited

Tidal Energy Limited have received their consents to place the first tidal energy device in Wales situated in Ramsey sound, Pembrokeshire. The device is due for deployment in 2012. This page has information about this exciting project with links to a specific project website for more details. DeltaStream technology uses the kinetic energy from tidal flows to generate a predictable source of sustainable electricity. DeltaStream’s tidal stream turbines use the same concept of horizontal axis rotors that are used in wind turbines, only being designed to suit the density of seawater which is 800 times greater than air and flow rates typically one fifth of wind. TEL is confident that the device will be reliable, as the technology components and know-how are all well proven.

DeltaStream Concept
The DeltaStream device is a 1.2MW unit which generates electricity from three separate horizontal axis turbines, each with a 15m rotor, mounted on a common frame. The use of three turbines on a single, 36m wide, triangular gravity base foundation produces a low centre of gravity enabling the device to satisfy its structural stability requirements including the avoidance of overturning and sliding.

DeltaStream was conceived by Marine Engineer, Richard Ayre with initial research funding from a sustainable development fund, administered by Pembrokeshire Coast National Park on behalf of the Welsh Assembly Government. Experts from Cranfield University undertook detailed design and optimisation of the blade design with funding from Carbon Connections UK. The benefits of the DeltaStream design include:

•Lightweight gravity foundation

•Modular design for ease of manufacture

•Easy to deploy and recover for maintenance