Scandlines determined to exchange the 5 propeller blades of the 4.6 meter diameter heart propeller with smaller blades. It now has a diameter of 4.2 meters.
Copenhagen-headquartered Scandlines has put in new blades on the middle propellers of the 2 battery-hybrid ferries it operates on the Gedser-Rostock route between Denmark and Germany. This has optimized the vessels for his or her present working profile, bettering propeller effectivity and giving a financial savings in propulsion vitality of as a lot as 11%
The 169.5 meter lengthy ferries, the Berlin and Copenhagen, have been launched in 2016 and have been particularly designed for the route with a propulsion resolution that includes a centerline controllable pitch propeller/rudder and two outer Azipull wing thrusters.
They have been initially optimized for a velocity of 20 knots with three engines in operation: two on the middle propeller and one for the lodge load and thrusters. As a part of the corporate’s inexperienced agenda, the velocity has been diminished to 16 knots and due to this fact just one engine is required on the middle propeller. However, the propulsion equipment of the vessel just isn’t optimized for this velocity and one most important engine didn’t have enough torque to rotate the propeller on the designed pitch (angle of the propeller blade). In order to not overload the engine, this required the pitch to be diminished with a major lower in propeller effectivity decreases.
To tackle the difficulty, Scandlines determined to exchange the 5 propeller blades of the 4.6 meter diameter heart propeller with smaller blades. The propeller now has a diameter of 4.2 meters. In addition to improved effectivity, this additionally reduces vibration and the chance of backside injury.
This just isn’t the primary fuel-saving modification Scandlines has made to the 2 ferries. In 2020, it installed a Norsepower rotor sail on Copenhagen and adopted this by becoming a rotor sail on Berlin final yr.
