After introduction of the Tier II versions of the MAN B&W M-range of 2-stroke diesel engines around 85% off all new orders are specified as electronically controlled ME/ME-C/ME-B types. This trend is covering all engine sizes, however the trend is most dominating for large bore engines (80, 90, 98) where nearly 100% of all orders are specified in electronic controlled versions. It is therefore of extreme importance that the ME engines has reached a matured development status and this paper confirms that this is indeed the case. Today the ME engine concept is widely accepted among major ship owners and the benefits of electronic control is seen more and more as the concept is enhanced with features as auto-tuning, integrated control of exhaust bypass, variable turbine area turbochargers, turbocharger cut-out and in the near future (Tier III era) integrated control of exhaust gas recirculation, water in fuel emulsion and SCR. An update of service related issues on the electrohydraulic control will be given. The continued change in economics for shipping following the world-wide financial crisis after autumn 2008 has called for continued focus on extreme low continuous load operation of several types of vessels. This focus started for large container vessels operated down to 10% load continuously. However now it also become relevant for other ship types like tankers and bulkers. An update on service experience will be given also including service experience with 'high-pscav tuning' as retrofit. Lower design speed for newly ordered ships has called for new engine types in various types of vessels applying larger diameter more efficient propellers. For large container vessels around 8000-14000 TEU's the S90ME-C engine in Mark 8 and Mark 9 versions have become new industry standard. An update on service experience with this new application of the well proven S90 engine, formerly predominantly specified for VLCC propulsion, will be given. The trend of applying lower propeller revolutions on various ship types has also called for introduction of the ultra-long stroke G-type engine series. Early service experience for these engines will be given. Common for both the ME/ME-C and the MC/MC-C engine series is the well documented possibility to do Condition Based Overhaul (CBO) with average Time Between Overhauls (TBOs) of 32000 hours and above. For tanker this opens up the possibility to do only major overhauls at dockings with 5 years interval. Many ship-owners do now have the experience of CBO. Development of a new piston ring package for small bore engines (50 bore and downward) has made it possible also to enjoy extended time between piston overhauls on these engine types. The so-called POP (Port On Plane) top piston ring will be introduced.


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    Titel :

    Service Experience of MAN B&W Two Stroke Diesel Engines - An Update


    Beteiligte:


    Erscheinungsdatum :

    2013


    Format / Umfang :

    14 Seiten, 14 Bilder


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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