Becker Marine Systems continues to focus on energy savings.
The new product innovation for container ships and other fast vessels
was developed with the combined expertise acquired from Becker rudders
for fast ships and the Becker Mewis Duct® for slower vessels.Becker Marine Systems continues to offer advanced solutions to the
maritime market and since 1946 has been renowned worldwide for improving the manoeuvrability of all types of ships. Furthermore, Becker Marine
Systems has focused on energy savings and provides one of the most
efficient energysaving devices for the maritime market with the Becker
Mewis Duct®.On average, power savings of over 6% could be achieved and by
December 2012 more than 150 vessels have been equipped with the Becker
Mewis Duct®.In the last three years over 350 systems have been sold. Becker
Marine Systems has reacted to the heavy demand of shipping companies for a similar device for faster vessels. After two years of research and
based on three years operational experience with the Becker Mewis Duct®
Becker Marine Systems has developed a new energy-saving device
tailor-made for container ships and other types of fast vessels with
bulbous stern – the Becker Twisted Fin®.The savings of the Becker Mewis Duct® are reduced at speeds above
approx. 20 knots, which is why this solution is for slower ships such as tankers, bulk carriers and heavy load vessels.Becker Marine Systems is now introducing the Becker Twisted Fin® for
faster ships with speeds above 18 knots. Like the Becker Mewis Duct®,
the Becker Twisted Fin® has no moveable parts, is also installed in
front of the propeller and generates a pre-swirl. The system thus
provides fast ships tangible energy savings. The nozzle ring is
significantly smaller than that of the Becker Mewis Duct® and has a
special, flat profile with much lower drag. The fins familiar from the
Becker Mewis Duct® on the inside of the nozzle ring extend outwards
beyond the nozzle.To prevent the formation of a swirl with cavitation at the ends of
the fins Becker has developed special end caps for the fins. The small
nozzle ring generates thrust, provides stability to the fins and reduces vibrations. Computational Fluid Dynamics (CFD) tests, model tests and
full scale operation have shown fuel savings averaging 3% for container
ships.Even better results can be obtained with the combination of a Becker
Twisted Fin® and the Becker TLKSR® Twisted Rudder. The well-proven
Becker Mewis Duct® business model will be continued with Becker Marine
Systems’ guarantee of the vessel’s power reduction as verified by a
model test. Each Becker Twisted Fin® system is individually designed
according to hull geometry, propeller design and engine data.The design takes into account the newest strength, fatigue and
vibration requirements from classification societies. After the
successful model test of the Becker Twisted Fin® prototype in early
2012, in June 2012 Becker Marine Systems had already signed a contract
with Hamburg Süd to retrofit the Becker Twisted Fin® system on a series
of ten 7,100 TEU container vessels.The tank tests were conducted at HSVA in Hamburg in October 2012 and
the first installation took place at Damen Shipyard in Rotterdam in
December 2012. The big challenge was the installation time of three days and a total docking time of five days. The complete installation was
carried out during the normal class docking of the vessels. Following
the first journeys, the measured power savings from the model test were
able to be reproduced during the vessel’s operation.With Becker Marine Systems’ energy-saving devices, the Becker Mewis
Duct® and the Becker Twisted Fin®, customers are prepared to fulfil the
newest EEDI regulations.Benefits of the Becker Twisted Fin®:Fuel savings of up to 3%Reduction of NOx and CO2 emissionsSuitable for newbuildings and retrofitsNo moving parts, no maintenance requiredFast installationStructural guarantee
SHIPBUILDING
15 February 2013 - 22:36
Germany: Becker Marine Unveils New Energy-Saving Device
The new product innovation for fast vessels was developed with the combined expertise acquired from Becker rudders for fast ships and the Becker Mewis Duct® for slower vessels.
SHIPBUILDING
15 February 2013 - 22:36
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