Danish ferry operator Scandlines has signed an agreement with wind propulsion specialist Norsepower Oy to install a rotor sail on the hybrid passenger ferry, M/V Copenhagen, which operates between Rostock in Germany and Gedser in Denmark.
Scandlines says that since 2013 it has invested more than 300 million euros in retrofitting ferries from conventional diesel power to hybrid power, in order to reduce emissions.
Norsepower’s Rotor Sail Solution is a modernised version of the Flettner rotor – a spinning cylinder that uses the Magnus effect to harness wind power to thrust a ship.
It is the first data-verified and commercially operational auxiliary wind propulsion technology for the global maritime industry.
When wind conditions are favourable, it enables the electric propulsion thrusters and central propulsion to be throttled back, while providing the power needed to maintain speed and voyage time.
The route between Rostock and Gedser runs almost perpendicular to the prevailing wind coming from the west, giving Scandlines favourable conditions for using Rotor Sails on the ferry crossing.
Work on the retrofit will begin in November, with completion scheduled for the end of 2020.
Copenhagen will be fitted with one of the largest ever Rotor Sails – standing 30m high with a diameter of 5m.
“By installing a Rotor Sail, we will be able to reduce CO2 emissions on the Rostock-Gedser route by up to five per cent,” says Scandlines CEO Søren Poulsgaard Jensen.