SEA-CARGO’s Tilting Rotor Sails Deliver Instant Operational Result
SEA-CARGO’s Tilting Rotor Sails Deliver Instant Operational ResultsNorsepower

SEA-CARGO’s Tilting Rotor Sails Deliver Instant Operational Result

In January 2021, Norsepower installed two 35x5m Rotor Sails for SEA-CARGO, a leading logistics provider in the North Sea market onboard the roro vessel,

In January 2021, Norsepower installed two 35x5m Rotor Sails for SEA-CARGO, a leading logistics provider in the North Sea market onboard the roro vessel, SC Connector. This was the world’s first installation of tiltable Rotor Sails, demonstrating that vessels that have to negotiate height restricted routes can benefit from this fuel and emissions-saving solution. Three months on, the vessel is demonstrating clear operational benefits. The SC Connector, has been sailing as per its schedule between Western Norway, the Netherlands and the UK, transiting under multiple bridges and powerlines. These are the initial results:

During testing, the two Rotor Sails on the SC Connector have generated a maximum thrust force equivalent of 7 MW propeller shaft power. Furthermore, the top speed peaked at 19.6 knots. The peak speed was achieved by Rotor Sail power (estimated at 7 MW) and approximately 3 MW from the main engine, demonstrating that the Rotor Sail generated more power than the installed main engine. This highlights that the vessel can transit faster on sailing alone, than with the installed main engine.

The crew of SC Connector has noted that the Rotor Sails have made the seakeeping ability of the ship considerably better by reducing the roll and by enabling higher speed in harsh weather. Being able to complete one round trip on schedule in rough weather can add over 25% to the cumulative annual savings of the Rotor Sails. The combined power from the main engine and Rotor Sails allowed the vessel to power through in tough conditions.

Every ton of fuel makes over three tons of CO2. 10 tons of fuel were saved during one North Sea passing from Norway which decreased fuel consumption but also costs. Investment in clean technology that reduces fuel consumption offers an opportunity to future proof vessels against inevitable fuel price increases as new fuels enter the market. For example, a 10% fuel saving from a Rotor Sail can mean the difference between operating profitably or not as new fuels enter the markets and as costs for carbon emissions are implemented.

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