New Energy-Saving Device: the Becker Twisted Fin

Press Release
Thursday, February 14, 2013

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 emissions
- Suitable for newbuildings and retrofits
- No moving parts, no maintenance required
- Fast installation
- Structural guarantee

Maritime Reporter April 2015 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

New Products

2 Damen Tugs for KOTUG’s European Harbor Towage

Damen Shipyards Group delivered two sister tugs ATD 2412 ‘ZP Bison’ and ‘ZP Bear’ to strengthen KOTUG’s European Harbour Towage. On April 8th 2015, the sister

Naming Ceremony of Evergreen's EVER LYRIC

Evergreen Group today held the naming ceremony for EVER LYRIC, the eighth of its L-type vessels built by CSBC Corporation in Taiwan. The ceremony took place

MacGregor's Pusnes bow loading systems for Suezmax Tankers

MacGregor, part of Cargotec, has secured contracts to supply Pusnes bow loading systems for three newbuild shuttle tankers intended for operations in Brazilian waters.

Marine Propulsion

2 Damen Tugs for KOTUG’s European Harbor Towage

Damen Shipyards Group delivered two sister tugs ATD 2412 ‘ZP Bison’ and ‘ZP Bear’ to strengthen KOTUG’s European Harbour Towage. On April 8th 2015, the sister

Solving the LNG Propulsion Puzzle

The last piece of the LNG infrastructure puzzle, in the form of North America’s first LNG bunker barge, falls into place at Conrad’s Orange, Texas Shipyard. With

Caterpillar Acquires ESRG Technologies

Caterpillar Marine has completed the acquisition of ESRG Technologies Group, LLC, a vessel monitoring and data analytics company in the marine industry.   The

Energy

Khamenei Says Iran Nuclear Weapons are a U.S. "Myth"

Iran's Supreme Leader Ayatollah Ali Khamenei told military commanders on Sunday the United States had created the "myth" of nuclear weapons to portray Iran as a threat,

New CEO for Evergas

Evergas has appointed Steffen Jacobsen as CEO of the company as of 8 May 2015 Mr. Jacobsen joined Evergas 1 February 2015 as Vice President, Fleet after almost 35 years in Maersk.

Icebreakers Ordered for Neft’s Novy Port Project

Aker Arctic’s icebreaker design selected for Gazprom Neft’s Novy Port project   Aker Arctic and Vyborg Shipyard have confirmed a contract for the design of two

Container Ships

NCSP Group Cargo Traffic Up 6% in Q1 2015

Novorossiysk Commercial Sea Port Group (NCSP Group or the Group) (LSE: NCSP, Moscow Exchange: NMTP) reports that Group’s consolidated cargo turnover in Q1 2015 increased by 2 million tonnes or 6.

Naming Ceremony of Evergreen's EVER LYRIC

Evergreen Group today held the naming ceremony for EVER LYRIC, the eighth of its L-type vessels built by CSBC Corporation in Taiwan. The ceremony took place

Liner Service Reliability Jumps to 64%

According to Drewry Supply Chain Advisors, liner shipping service reliability on the three East-West trades showed an aggregate on-time performance of 64% in March - a five-month high.

Marine Equipment

USN Names Littoral Combat Ship

Secretary of the Navy Ray Mabus announced today that the next Freedom-variant littoral combat ship (LCS) will be named USS St. Louis. The future USS St. Louis,

2 Damen Tugs for KOTUG’s European Harbor Towage

Damen Shipyards Group delivered two sister tugs ATD 2412 ‘ZP Bison’ and ‘ZP Bear’ to strengthen KOTUG’s European Harbour Towage. On April 8th 2015, the sister

PSV Launching Ceremony at Gondan

At high tide today at Gondan Shipyard in Figueras, the New PSV (TBN) for the Norwegian Ship-Owner, Simon Møkster Shipping, was launched. Different personalities

Vessels

Taiwan's Yang Ming Marine to Add Bigger Vessels to its Fleet

Yang Ming Marine Transport Corporation, Taiwnanese global shipping and logistics services company,  will take delivery of 14 large-sized ships over the next two years,

Qatar to Contract 6,000 Rooms on Cruise Ships for 2022 World Cup

Reviving an idea to lodge some football fans and guests during the 2022 World Cup in “floating hotels,” the Qatar Tourism Authority (QTA) has announced plans to contract at least 6,

Star Bulk Adds Jennifer

Star Bulk Carriers Corp has added M/V Star Jennifer (ex "Ore Hansa), a 82,290 dwt Kamsarmax bulk carrier, built in 2006, to its fleet.   The Company completed

 
 
Maritime Careers / Shipboard Positions Maritime Contracts Maritime Security Naval Architecture Navigation Ship Repair Ship Simulators Shipbuilding / Vessel Construction Sonar Winch
rss | archive | history | articles | privacy | contributors | top maritime news | about us | copyright | maritime magazines
maritime security news | shipbuilding news | maritime industry | shipping news | maritime reporting | workboats news | ship design | maritime business

Time taken: 0.4802 sec (2 req/sec)