Service Experience - MAN Diesel & Turbo - 首页

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Slow Steaming Slow steaming has also become very relevant due to the financial situation in the world. Also on this topic, we have issued service letters relevant for MAN B&W low speed engines, SL08-501/ SBE, Ref. [6], and SL09-511/MTS, Ref. [7]. The reason for the desire for slow steaming can be seen in Fig. 56. Fig. 56: Low load operation A vast amount of fuel can be saved per tonnes-mile of seaborne travel when reducing the ship speed and thereby the engine load. Fortunately, we have been able to sup- port continuous operation down to 10% load without any engine modifications, except the use of slide fuel valves. Economy mode: 174 168 SFOC 3-4g/kWh 1-2g/kWh Fig. 58: Part optimisation ME/ME-C and MC/MC-C There are various means to optimise operation at low load. Some of these are: Turbocharger with VTA, Fig. 57 Part load optimisation, Fig. 58 Sequential turbocharging, Fig. 59 Turbocharger cut-out, Fig. 60 Exhaust gas bypass VTA Fig. 57: Turbocharger with variable turbine area (VTA) MC/MC-C 100% SMCR optimised ME/ME-C 100% SMCR optimised ME/ME-C Low load mode 100% SMCR optimised ME/ME-C Part load optimised ME/ME-C Low load mode part load optimised 1-2g/kWh Actuator units Turbine inlet casing 1-2g/kWh 3-4g/kWh 162 20 30 40 50 60 70 80 90 100 110 % SMCR Engine shaft power Service Experience of MAN B&W Low Speed Diesel Engines 29
Fig. 59: Sequential turbocharging VTA Service Experience The first VTA turbocharger has been in service for well over 10,000 hours on a 6S46MC-C engine on a vessel operating on heavy fuel. Service experience has been very good and the test continues. More details with respect to service experience can be found in the Worldwide Turbocharger Conference 2009 paper, Ref. [8]. 30 Service Experience of MAN B&W Low Speed Diesel Engines Fig. 60: Turbocharger cut-out
Page 1 and 2: Service Experience MAN B&W Low Spee
Page 4 and 5: Service Experience of MAN B&W Low S
Page 6 and 7: A B C On a few actuators for the or
Page 8 and 9: Broken Litz wire Fig. 10: Parker pi
Page 10 and 11: First Service Results for Mark 9 La
Page 12 and 13: Fig. 22: Upper main bearing shell b
Page 14 and 15: Two-pad type pressure distribution
Page 16 and 17: layer during running-in, leading to
Page 18 and 19: Fig. 35: Lifting bracket cracks All
Page 20 and 21: New type Old type Thin, bent stay b
Page 22 and 23: Top piston ring wear, defined by me
Page 24 and 25: CBO of Bearings Since the late 1990
Page 26 and 27: 6S70MC-C on maiden voyage • Conti
Page 28 and 29: Coping with Low Sulphur Fuel in the
Page 32: T/C Cut-out and Swing Gate Valve Ex

Service Experience - MAN Diesel & Turbo - 首页

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