MAN B&W Dual Fuel Engines

Transcription

1 MAN B&W Dual Fuel Engines Athens Seminar on 2 th Oct Thomas S. Hansen Two-Stroke Promotion & Customer Support 2 th Oct. 2018

2 Today - The Dual Fuel success 4 x World s first duel fuel driven ships equipped with MAN B&W engines First engine order World s first LNG driven ocean going ship Owner: TOTE Ship type: Container ship Capacity: 3,100 Teu Dual Fuel engine type: 8L70ME-C8.2-GI Year 2012 World s first methanol driven ocean going ship Owner: MOL Ship type: Methanol carrier Capacity: 50,000 dwt Year 2013 Dual fuel engine type: 7S50ME-B9.3-LGIM World s first ethane driven ocean going ship Owner: Hartmann Schifffahrt Ship type: LEG Carrier Capacity: 36,000 M 3 Dual Fuel engine type: 7G50ME-GIE World s first LPG driven ocean going ship Owner: Exmar Ship type: VLGC Capacity: 80,000 M 3 Dual Fuel engine type: 6G60ME-LGIP Year 2014 Year 2018

3 MDT 2 stroke Dual Fuel Engine ME-GI Available for Methane and Ethane ME-LGI Available for LPG and Methanol

4 Dual Fuel Technologies Mr. Diesel s Process (High Pressure Injection) Mr. Otto s Process (Low Pressure Injection) MAN B&W Dual Fuel Engines - Dual fuel done right 10/2/2018 4

5 Combustion Process of ME-GI

6 Benefits of Diesel-type versus Otto-type combustion for Two-Stroke Engine Combustion concept Diesel cycle Otto cycle Power density Unchanged Power reduced Gas mode efficiency Increased Unchanged Diesel mode efficiency Unchanged Reduced Gas quality/requirements (LCV) Insensitive Sensitive Methane number dependent No Yes Pilot fuel oil (amount) MDO/HFO (1.5-5%) MDO (approx. 1%) High ambient temperature Insensitive Sensitive Combustion processes Diesel process Premixed Cylinder max. pressure variations Stable and low Unstable and high Knocking during load change None Possible Misfiring None Possible Methane slip 0.1% of SFOC 2-4% of SFOC GWP Reduced by 20% Increased Scavenge air receiver explosion risk No Yes Crankcase explosion risk No Yes Exhaust receiver explosion risk No Yes

7 The diesel cycle Fully stable combustion under all weather condition. Heavy weather condition: High & higher ambient air temperature : Full operational in gas mode. No risk of knocking or misfiring High efficiency without methane slip is maintained Full operational in gas mode. No risk of knocking or misfiring High efficiency without methane slip is maintained MAN B&W Dual Fuel Engines - Dual fuel done right

8 Two-Stroke GHG Emissions for LNG Combustion Diesel vs. Otto Methane slip GWP (Global Warning Potential in CO 2 equivalents), values from the latest IPCC report and for the two most commonly used timeframes: Emissions GWP20 GWP100 CO2 1 1 CH MAN B&W Dual Fuel Engines - Dual fuel done right 10/2/2018 8

9 14000 Teu C/V - GHG Emissions for LNG Combustion: Two Stroke Diesel process versus Two Stroke Otto process. Relative GHG emissions in CO2 Equivalents Diesel 100 % Diesel 111 % Diesel Process Combustion in Gas Mode Otto Process Combustion in Gas Mode Diesel 76 % Otto 90 % Diesel 79 % Otto 110 % Tier II 0 Fuel Oil Mode Gas Mode GWP100 Gas Mode GWP20 MAN B&W Dual Fuel Engines - Dual fuel done right 10/2/2018 9

10 ME-GI development Mk.2 The project at a glance Ready Optimizing of FGSS: Cost reduction of BOG compressor Optimizing of GVT: Minimizing installation: Improved operation and reduction of components: Introduction of MEGI PVU Cost efficient Embedded redundancy Cost down Alternative solutions Simplification Reduction of material Removal of return double wall pipe Simplification of pipe installations Blow off Reduced pilot consumption from 3% to 1.0% Gas cylinder cut-out Removal of return chain pipe Optimized gas block Engine control and hydraulic integration Gas inlet Double wall pipe reduction

11 ME-GI development Mk.2 Installation system overview ME-GI Mk.2 - Focus areas Ventilation Nitrogen System Gas Supply System Nitrogen System GVT

12 ME-GI development Mk.2 Reduction of pilot oil consumption 1.5 % pilot is available today MAN is committed on working on reduction of pilot oil for ME-GI Mk.2 from 1.5 to 1%: Economical advantages use of less pilot oil, reduced OPEX Environmental benefits FBIV with dedicated pilot

13 ME-GI Mk.2 Individual cylinder gas cut-out example Gas operation Cylinder gas failure Stop gas operation on engine ME-GI Mk.1 Stop gas operation in cylinder ME-GI Mk.2 New feature Improved gas availability

14 Air Liquide Turbo-Brayton LNG sub-cooler unit

15 Fuel Gas Supply System BOG used by auxiliary engines

16 Conclusion The MAN B&W Duel Fuel Engines: - 4 Times Worlds First Two-Stroke Marine Engines - Dual Fuel Done Right by the Diesel Process - Highest safety with no risks for explosions in exhaust or crankcase - Highest efficiency - Lowest GHG impact, and negligible Methane slip for LNG - 55 vessels in service, 244 engines on order MAN B&W Dual Fuel Engines - Dual fuel done right 10/2/

17 Thank you very much! Author Department Phone Day, Month, Year