Siemens strengthens its position in ocean power

Our target is to secure a leading position in this future business.” As a pioneering company, Marine Current Turbines has become a technology leader in tidal power systems. Back in November 2011, Siemens increased its stake in the company to 45 percent. Siemens is planning to complete the acquisition of Marine Current Turbines in the coming few weeks. Financial details of the deal are not disclosed.

Global carbon reduction commitments are increasing demand for reliable marine current power. Experts are expecting double-digit annual growth rates for this sector up to 2020. The worldwide potential for power generated by tidal power plants is estimated at 800 terawatt-hours (TWh) annually. That is approximately 25 percent more than the total power demand of Germany and is equivalent to between three and four percent of global power consumption. Coastal regions with strong tidal currents like those in the UK, Canada, France and East Asia offer major potential for the utilization of this technology.

Marine Current Turbines (MCT) has already successfully implemented a commercial-scale demonstration project with SeaGen in Strangford Lough in Northern Ireland. Since November 2008, two axial turbines with a combined capacity of 1.2 megawatts (MW) have been providing power to approximately 1500 households. SeaGen has to date fed more than three gigawatt-hours of electricity into the grid. In terms of power generation this is the largest tidal current power project to date. Further projects are at the planning stage, including the 8-MW Kyle Rhea project in Scotland and the 10-MW Anglesey Skerries project in Wales. “Siemens’ acquisition is hugely welcomed by staff and management at MCT and signals great confidence in MCT’s achievements over many years,” said Andrew Tyler, CEO of MCT.

Tidal turbines generate electricity by utilizing tidal current flows. The SeaGen turbine is fixed on a structure and is driven by the flow of the tides. This technology is effectively similar to a wind turbine, with the rotor blades driven not by wind power but by tidal currents. Water has an energy density that is 800 times higher than that of wind. Twin rotors turn with the tidal current and optimally track the direction and speed of flow thanks to blades which can rotate through 180 degrees. A key advantage is that the generated power is precisely predictable in the tidal cycle.

Tidal turbines are part of Siemens’ Environmental Portfolio. In fiscal 2011, revenue from the Portfolio totaled about €30 billion, making Siemens one of the world’s largest suppliers of ecofriendly technologies. In the same period, our products and solutions enabled customers to reduce their carbon dioxide (CO2) emissions by nearly 320 million tons, an amount equal to the total annual CO2 emissions of Berlin, Delhi, Hong Kong, Istanbul, London, New York, Singapore and Tokyo.