Tidal current turbines
Energy generation based on tidal current is an important area of innovation for ANDRITZ HYDRO.
ANDRITZ HYDRO Hammerfest represents a leading technology provider in the tidal power business capable to generate clean, renewable and predictable energy from tidal currents occurring in coastal waters.
The company is part of ANDRITZ HYDRO, a global supplier of electro-mechanical equipment and services for the hydropower business.
In December 2011 ANDRITZ HYDRO Hammerfest successfully deployed its 1 MW pre-commercial tidal turbine HS1000 destined to validate the technology for the world’s first tidal power array at the European Marine Energy Centre (EMEC) in Orkney, Scotland.
The technology had already a five-year track record in Norwegian waters as the first ever tidal current turbine with permanent connection to a public grid in 2004. This smaller prototype has delivered over 1.5 GWh to the grid and shown up to 98% availability during prolonged test runs.
Building on the prototype, the seabed-mounted HS1000 is a tried-and-tested design with horizontal axis rotor, pitched blades and yaw feeding a variable speed conventional generator via a gearbox. Automatic control software governing a sensor-driven monitoring system adjusts the leading edge to capture optimum output from a given tidal environment. It is meant for among the most taxing marine currents, designed to handle flows between 1 and well above 4 m/s, in water depths down to 100 m. A new installation method will reduce installation time significantly and enable efficient future maintenance.
Performance and operational capabilities has been fully validated according to expectations during test runs, including continuous autonomous running over a prolonged period.
The first commercial delivery will be for ten machines for ScottishPower Renewables’ (SPR) Sound of Islay project, an array to be built in the 2.7 m/s tidal stream that runs between the islands of Jura and Islay in the Inner Hebrides archipelago. This larger-scale development is the first to be approved in Scottish waters, and the first unit is slated to be lowered into the water in early 2015. The power output is expected to meet the electricity demand of 3,000 islanders, along with a number of whisky distilleries. Beyond Islay, SPR and ANDRITZ HYDRO Hammerfest plan the 95 Megawatt Ness of Duncansby project in the high-velocity Pentland Firth, Scotland.