Becker Mewis Duct Orders Total 96
The success of the Becker Mewis Duct speaks for itself. Since its introduction in 2008, 96 orders have been placed of which 17 have been installed to date. This year alone, two Becker Mewis Ducts have already been ordered by the Greek OSG Ship Management Ltd. for 74,400DWT bulk carriers and another order for five came from BW Fleet Management Pte. Ltd., Singapore for 286,000DWT bulk/ore carriers.
Due to the number of propulsion tests for vessels made with and without the duct a reputable statistical statement is possible, according to Becker. The average of fuel saved stands at 6%. The Mewis ducts that were in operation until mid-February have already saved 7,243 t of carbon dioxide emissions – as much as 725 cars emit in one year.
Combined with a Becker Rudder, the propulsion improvement and fuel saving could be further enhanced, with fuel savings of up to 8 %. Compared to other types of fuel saving devices and experiences with similar devices this is a very good and positive result. The reliable concept with a fuel saving guarantee for suitable vessels offers significant benefits for the environment by reducing the emission of NOx and carbon dioxide.
Highly-Efficient
The Becker Mewis Duct , a highly-efficient energy-saving device, was named after the inventor Friedrich Mewis and is developed, manufactured and retailed by Becker Marine Systems. The duct is placed in front of the propeller with the purpose of improving the water flow to the propeller. The advantage of the Becker Mewis Duct is that it combines two positive devices: a pre-swirl stator and a duct. The stator blades are non-movable fins that create a pre-swirl. This means that they change the angle of the flow towards the propeller in such a manner that it operates as a counter-rotated device with a more favourable angle of attack. The effect of the duct is to increase the velocity of flow towards the propeller, which is again an improvement in the propeller’s working condition. The duct itself creates a forward directed thrust due to its foil section shape. Becker Marine Systems delivers each Becker Mewis Duct individually adjusted for the actual hull form and propeller after a thorough design phase using Computational Fluid Dynamic (CFD) computations.