The master thesis is a part of the research project energy. The primary activity will be a model test of one particular vessel, belonging to solstad shipping. Pdf the need for energy efficiency in ship design and operation has been continuously. With the installation of the duct, the axial mean wake fraction on the propeller disc decreased, while the tangential mean wake fraction increased significantly. To define the guidelines for the design of a mewis duct for a small bulk cargo ship, a numerical study was carried out to investigate the effects of a fanshaped mewis. Download pdf 184 kb abstract in this thesis, the efficiency of a mewis duct in waves has been investigated with the use of model tests in the large towing tank at marintek in trondheim. The lng power barge of hpe hybrid port energy generates energy for cruise ships lying in port. Since its launch in 2008, the becker mewis duct power saving device has experienced extraordinary success. Deviations from the original tests have been found, which could be due to increased resistance of the model and bias in the tow force and thrust measurements. The easily installed becker mewis duct for vessels with a high block coefficient. However, by combining two or more components of already established. And i will extract another set of pdf files from a zip file that have the identical file name as 875458.
More than just delivering spares continued from page 1. Since its launch in 2008, the becker mewis duct power saving device has. The becker mewis duct bmd is a system that can be installed onboard ships making possible to either achieve significant reduction of fuel usage at a given speed or to allow the vessel to move faster for a particular power ratio. Propeller technology to make your ship more efficient. Fuel and costsavings by hydrodynamic measures contents 1. The small clearance between the propeller and duct reduces tip vortex, increasing efficiency. Compared to using onboard diesel engines, power supplied by the lng power barge will lead to a dramatic reduction of harmful. 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. Smallpdf the platform that makes it super easy to convert and edit all your pdf files. To date over 100 have been delivered, with about 300 on order. The duct axis is positioned vertically above the propeller shaft axis, with the duct diameter smaller than the propeller diameter. Hansen as provides tailor made consultancy and design services to the global maritime industry. The basics how do i set default construction types.
Mewis duct offers 5% fuel savings april 24, 2012 becker marine systems has delivered the largest becker mewis duct ever made with a diameter of 8. The main effect of the becker mewis duct is the reduction of energy losses of the propeller. The fin setting designed on the basis of model experiments was subject to further adjustments to make full use of the fullscale wake flow. The featured product brochure is pdf material of our parent company becker marine systems. Deichmann, fred 20 power and costsavings for container vessels by hydrodynamic energy saving devices, 4th international ship efficiency conference, hamburg, september 20, stgjahrbuch 107. Becker mewis duct brochure becker marine systems pdf. Pdf investigation of the effects of a fanshaped mewis. The model test will be carried out in the spring term, as part of the master thesis. Because technology and operational improvements cannot keep up. Its becker mewis duct reduces co2 by 347 t per year. Mewis 24,25,26 developed the mewis duct for smaller container ships and bulk carriers by combining a wed with preswirl fins. The becker mewis duct is an energysaving device developed for fullform slower ships enabling either significant power savings at a given speed or.
These can be positioned either ahead of the propeller fixed to the ships hull, or. Technology and efficiency, its role and mechanism for. The becker mewis duct challenges in fullscale design. Combine multiple pdf files into one document with this tool, youll be able to merge multiple pdfs online as well as word, excel, and powerpoint documents, and well combine them into a single pdf file. This paper introduces a novel approach, a preswirl duct. Becker marine systems provides tlksr and tlfksr twisted rudders, flap rudders, schilling rudders, full spade rudders, the becker mewis duct, kort nozzles and more for the ship industry. The return of investment of the mewis duct is strongly depending on. The mewis duct is supported by a number of preswirl fins and is positioned eccentrically with respect to the. Mewis duct new developments, solutions and conclusions.
Frequently asked questions about the rightdraw module in the rightsuite. Indra nath bose head vessel performance management. No mewis duct yob 2009 no mewis duct random big picture suezmax speed trend no mewis duct yob 2009 mewis duct in 2014 intertanko speed trend no mewis duct mewis duct in 2014. Furthermore we uploaded uptodate general information such as our general terms and conditions in pdf format for you to download. Mewis is the older sister of ucla and united states womens national soccer team player sam mewis. The mewis duct is a new energysaving device which has been developed for fullform slower ships, allowing fuel savings of up to 8 %. Becker products have been installed on well over 8,000 vessels and we still continue to improve and further develop manoeuvring solutions for the future. Energy saving device propeller mechanical engineering. Both designs feature a becker mewis duct, a rudder bulb and other fuel saving devices, to make them the most environmentally friendly newcastlemaxes afloat. This is normally larger than the thrust reduction of the propeller. We worked closely with hyundai and maric to develop the most economical newcastlemax hull forms. The key advantage of the mewis duct is to improve four components of the propeller flow. The mewis duct mewis, 2008, mewis, 2009 was originally developed within the context of smaller container ships and bulk carriers by a combination of a wake equalizing duct and preswirl fins, resulting in a energy savings of 79%.
Port of prince rupert green wave program the green wave program, introduced in 20, offers reduced harbour dues to vessels that have implemented emission. They are fitted with becker mewis duct and boss cap fin propeller, making them fuel efficient and environmentally friendly. Solving all your pdf problems in one place and yes, free. Mewis was the united states soccer federations 2008 young female athlete of the year. At the same time, a circulation occurs, resulting in an inward aimed force, that has a forward component. The mewis duct and wake equalizing duct wed are two examples of forepropeller appendages that are based on. The becker mewis duct is a novel powersaving device which has been developed for fullform slower ships that allows either significant fuel savings at a given. Results in regular waves show a consistent increase in the effective wake with the mewis duct fitted, but the thrust deduction contains a. Investigation of the effects of a fanshaped mewis duct. Below you will find hpe hybrid port energy product folders as downloadable pdf files. Investigation of the effects of a fanshaped mewis duct before a.
Our kamsarmaxes feature ice class 1c and 4 x 40 ton macgregor electrohydraulic side mounted cranes with 30 metre outreach and 20 cbm smag grabs. Equalisation of the propeller inflow by positioning the duct ahead of the propeller. The remarkable improvement in ship design efficiency from the installation of the becker mewis duct led to bps decision to also install beckers energysaving device on the remaining batch of five vessels in the series. Extract pages from your pdf or save each page as a separate pdf. Pdf the becker mewis duct challenges in fullscale design. As the installation position was far away from the propeller, the. Mewis duct offers 5% fuel savings cruise industry news. The duct straightens and accelerates the hull wake into the propeller and also produces a net forward thrust. General setup and templates using rightdraw design duct sizing and layout working with cad. The mewis duct is ideally suited for both newbuild and retrofit applications.
Because savings from the becker mewis duct are reduced at speeds above approx. An experimental and cfd study on the effects of different. Vessels need only satisfy one criterion to achieve the. In general the efficiency improvements to be gained are highly dependent on the geometry of. The duct axis is positioned vertically above the propeller shaft axis, with the duct diameter smaller than the. Duct wed installed necessary criteria to achieve one of the three discounted harbour dues rates. The becker mewis duct friedrich mewis ship hydrodynamics.
Mewis duct concept it is an energysaving device placed in front of the propeller, and a combination of a preswirl fin system the contrapropellerprinciple and a wake equalizing duct the pre duct principle. Tanker operator conference making money in a tough market mumbai 5th february 2015. The becker mewis duct is a version based on an eccentric annular nozzle fitted between the hull and the propeller, supported by a number of flow directing radial vanes, each of which is angled to optimise inflow direction. The preferred location of the traverse in a supply duct should be in a straight section of duct with 10. The bmd is comprised by fixed elements that are mountedattached on the ships hull. Merge pdf a free solution to all your pdf problems.
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