The Finnish Transport Infrastructure Agency has launched the Calypso, a new icebreaker concept boat equipped with an innovative hybrid motorized removable bow powered by Danfoss Editron. The icebreaker vessel is currently moored in Mustola harbor in Lappeenranta and has begun operating on Lake Saimaa and the deep waterways of the surrounding area this winter.
The removable bow, the world’s largest motorized of its kind, has been delivered by Turku Repair Yard as part of the Winter Navigation Motorways of the Sea II project. The €7.6 million scheme, co-funded by the EU Connecting Europe Facility programme, aims to develop and enhance the maritime winter navigation system and its safety during the winter. One of its key targets was the creation of a motorized icebreaking removable bow concept, which would enable ice-strengthened vessels to be used as icebreakers during the winter. This specific bow is capable of breaking ice up to 70cm thick.
Danfoss Editron’s hybrid-electric system is powering the removable bow with two generators, built as a DC system, and two propulsion systems. The company has also provided a front supercapacitor so that peak powers can be efficiently controlled. The EDITRON software also cuts fuel and delivers high efficiencies as the diesel generators in the DC system can be driven at variable speeds. The power plan and propulsion system of the removable bow have been designed to be operated from the pusher tug wheelhouse, while the machinery can operate unmanned.
As winter temperatures in Finland can plummet to minus 30 degree C, icebreakers are a necessity even during mild winters. Introducing hybrid electric power in icebreaking operations will help the country meet its target to lower emissions by 40% by 2030 compared to 1990 levels.