ROTOR SAIL ONBOARD VIKING GRACE
Norsepower Oy, the leading provider of low maintenance, software operated, and data verified auxiliary wind propulsion systems, has signed an agreement with Finnish shipping company Viking Line to install its Rotor Sail Solution onboard the M/S Viking Grace, an LNG-fuelled cruise ferry. The 57,565 GT M/S Viking Grace currently operates in the archipelago between Turku (Finland) and Stockholm (Sweden), and is already one of the most environmentally-friendly cruise ferries in the global maritime industry. With the addition of Norsepower’s technology, the vessel will further reduce its emissions, fuel burn and fuel costs; reducing carbon emissions by circa 900 tonnes annually; equivalent to cutting 300 tonnes of LNG fuel per year. Preparations for the retrofit are underway, with the installation scheduled to take place during Q2 of 2018. Viking Grace is set to be retrofitted with one medium-sized Norsepower Rotor Sail unit that is 24m in height and 4m in diameter, making it the first-ever global LNG/wind electric propulsion hybrid ship.
The principle on which the Norsepower Rotor Sail operates is known as the Magnus effect. When wind meets the spinning Rotor Sail, the Rotor Sail accelerates air flow on one side of the Rotor Sail and restricts the air flow on the opposite side of the Rotor Sail. The resulting pressure difference creates a force that is perpendicular to the wind flow direction – a lift force.
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