WATCH: Orbital O2 – The World’s Most Powerful Tidal Turbine


Orbital Marine Power has revealed the designs of its upcoming commercial production tidal turbine, the Orbital O2 2MW, which is targeted to be deployed at the European Marine Energy Centre (EMEC) in Orkney in 2020.

The Orbital O2 will comprise of a 73 meters long floating superstructure, supporting two 1 MW turbines at either side for a nameplate power output of 2MW, at a tidal current speed of 2.5 m/s.

With rotor diameters of 20 meters, it will have a 600sq metre rotor area, the largest ever on a single tidal generating platform to date.

Orbital Marine believes that, when launched in 2020, it will be the most powerful tidal generating platform in the world.

Andrew Scott, CEO of Orbital Marine Power, said: “The Orbital O2 is a low cost solution for future commercial projects and builds on the features which made the SR2000 an industry breakthrough. This optimised turbine will unlock tidal markets around the world at a competitive price point and provide regulators and investors with a new, predictable renewable energy option.”

This first production unit will be funded with support from a live public debenture offer through the Abundance Investment platform, along with the European Horizon2020 and Interreg North West Europe innovation programmes. The debenture offer has already raised close to 50% of its £7-million target.

The Orbital O2 has been designed for low cost access to all systems and components, the vast majority of which are located within the floating superstructure for simple onsite maintenance as per the SR2000. The machine will also feature new ‘gull wing’ style retractable legs that raise the nacelles, pitch hubs and blades to the water surface for easy access without the need for any specialist heavy lift vessels.

The steel structure of the turbine has been simplified to reduce fabrication costs and futureproof the product for volume manufacturing. The new configuration also reduces the draught of the unit to less than 3m to ensure this utility scale machine can be towed and installed with modest sized workboats.

For the first time, Orbital Marine Power’s system will feature 360 degree blade pitching control. This shoud allow safe, dynamic control of the machine’s 20m rotors and will enable power to be captured from both tidal directions without need to yaw the entire platform. These controllers will support the installation of even larger blades in the future.

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