ABB Dynafin unveils “whale’s tail” propulsion concept

A propulsion system concept called the Dynafin, which draws inspiration from the motions of a whale’s tail, has been revealed by ABB. The concept – a result of more than 10 years of R&D and testing – consists of a main electric motor which powers a large wheel that rotates approximately 30-80 times a minute. Attached to the wheel are vertical blades, each controlled by a single motor. The combination of the wheel and blades results in both propulsion and steering forces.

ABB estimates that the first prototype of the Dynafin will be available in 2025, and to begin with, the propulsion solution will come in power ranges from 1-4MW per unit. The system is well suited for medium- and small-sized vessels such as ferries, offshore support vessels or yachts and also delivers reduced noise and vibration levels.

A study conducted by OSK-ShipTech of a passenger vessel design with different propulsion systems fitted found that the ABB Dynafin would result in verified savings in propulsion energy consumption of up to 22% compared to conventional shaft line configurations, saving fuel and emissions. The Dynafin concept is also compatible with zero-emission battery and fuel cell technologies.

“ABB Dynafin shows what is possible when marine engineers pursue radical innovation and progress, inspired by the interplay of evolution and technology,” said Juha Koskela, ABB Marine & Ports division president.

“This solution is all about operational efficiency and emissions avoidance, leveraging innovations from the brightest minds in marine and propulsion engineering. I want to thank the whole team for their persistence, resilience, innovativeness and years of hard work.”