First type-approval for wind assist system

Malcolm Latarche
Malcolm Latarche
ShipInsight

06 March 2019


Classification society DNV GL has issued the first-ever type approval design certificate granted to an auxiliary wind propulsion system onboard a commercial ship.

The type approval was issued last month after a design assessment of Norsepower’s 30-metres by 5-metre Rotor Sail, two of which have been installed onboard the Maersk Pelican LR2 tanker. The landmark certification means that vessels operating Norsepower’s Rotor Sail Solution are technically capable of safely navigating ‘all operational and environmental situations’.

Pelican
Two 30m x 5m Norsepower Rotor Sails onboard the Maersk Pelican.

Norsepower’s Rotor Sail Solution is a development of the Flettner rotor and uses the Magnus effect to gain additional forward propulsion under certain wind conditions. It is a fuel-saving technology, supporting the decarbonisation of the shipping industry and has already been installed on three vessels and achieved over 35,000 hours in operation, saving more than 4,500 tonnes of CO2 in the process. The solution has delivered independently verified fuel savings with potential of up to 20%.

Commenting on the type approval, Norsepower CEO Tuomas Riski said, “We are very proud to be the first company to have type approval granted to an auxiliary wind propulsion system onboard a commercial ship. Having a type approval design certificate is very important to us. Clearly, it provides shipowners, operators, and charterers with a level of assurance when investing in the Rotor Sail Solution, but in the long term, it removes yet another hurdle to the realisation of renewable wind energy propulsion systems at a scale that supports shipping’s transformation to a low carbon transport sector.”

Geir Dugstad, Director of Ship Classification and Technical Director at DNV GL, added, “To help reduce shipping’s environmental impact we will need many different fuel and technology options, which is why we were very pleased that Norsepower asked us to be part of this innovative wind propulsion project.”