propeller nozzle for ships

Product catalog summary

Introduction
The document discusses the Mewis Duct®, a product by Becker Marine Systems designed to improve ship propulsion, save fuel, and reduce emissions. It is particularly effective for vessels with high block coefficients, such as tankers and bulkers.

Specifications and Benefits

Propulsion improvement and fuel savings up to 8%.
Reduction in NOx and CO2 emissions.
No moving parts, suitable for both retrofits and new builds.
Designed for large vessels with high block coefficient CB and high propeller thrust coefficient CTH.

Technical Description
The Mewis Duct® optimizes water flow to the propeller, enhancing efficiency. It features a duct and special fins that pre-swirl the water stream, improving propeller and rudder efficiency. The system is robust and guarantees fuel savings, with a return on investment typically under two years.

Case Study: VLCC
A case study of a Very Large Crude Carrier (VLCC) demonstrates significant fuel savings. With a length of 318.0 m and a beam of 60.0 m, the VLCC achieves a 5% reduction in fuel costs, saving approximately $700,000 annually.

Operational Mechanism
The Mewis Duct® stabilizes water flow, ensuring consistent load distribution on propeller blades. Integrated fins create a preswirl counter to propeller operation, increasing thrust. The system works best when combined with a Becker Rudder, optimizing wake field and reducing rudder resistance.

Contact Information
Becker Marine Systems provides contact details for their offices in Germany, Asia, China, and Norway for further inquiries and services.

Catalog excerpts

Fuel saving, environmentally friendly Mewis Duct ® • Propulsion improvement • Fuel saving up to 8 % • Low NOX and CO2 emission • No moving parts • Retrofits and newbuilding • Ideal for tankers and bulkers WWW.BECKER-MARINE-SYSTEMS.COM MANOEUVRING M AT E R I A L H A N D L I N G COMMUNICATION

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Fuel saving, environmentally friendly Mewis Duct VLCC, length 318.0 m, beam 60.0 m, draft 20.0 m, Fuel consumption t/day (85 % MCR): 831 Fuel price per t (June 2008): 640 $ Fuel consumption, 150 days at 85% MCR plus 150 days at 70% MCR per year: 22,7001 Fuel bill per year: 14,000,000 $ 5 % fuel cost saved per year Becker Marine Systems' R&D team has always focused on ship propulsion improvement in order to save fuel and reduce The Mewis Duct® is an elegant and simple optimizer for vessels with high block coefficient. It reduces the propulsion power by optimizing the water flow. The duct and special...

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The wake field of bulky and full ships with high block co- efficient reduces the propulsion efficiency of the propeller. The water inflow has such an unfavourable characteristic that the propeller does not get enough water. The Mewis Duct® harmonizes and stabilizes the flow and generates a consistent load distribution on the propeller blades. The integrated fins have a stator effect by generating a preswirl in counterdirection of the propeller operation, this generates a higher load on the propeller and there- fore more thrust. The fins are asymmetrically profiled and arranged to generate a perfectly...

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Beo leer manoeuvring systems your reliable choice Becker Marine Systems Head office Service contacts Becker Marine Systems Asia Singapore (Headquarter Asia) Becker Marine Systems China Shanghai (Representation Office) Becker Marine Systems China Nanjing (Site Office) Becker Marine Systems Norway becker marine systems

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