session 7: engines forum panel: two-stroke engines ... ue two stroke engine october 2015 marine...
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© 2015 MITSUBISHI HEAVY INDUSTRIES MARINE MACHINERY & ENGINE CO., LTD. All Rights Reserved.
Mitsubishi UE two stroke engine
October 2015
MARINE ENGINE DIVISION
DESIGNING SECTION
Asian Marine Engineering Conference 2015
Session 7: Engines forum
Panel: Two-stroke engines
- Flexibility and efficiency: Finding the balance
© 2015 MITSUBISHI HEAVY INDUSTRIES MARINE MACHINERY & ENGINE CO., LTD. All Rights Reserved.
FOC reduction
- Design changes : Propeller Engine
- Efficiency : Engine, Turbocharger
- Turning & Operation : Part / Low load
Auto control
- System efficiency : MEET
Environmental issue
- Tier III compliance : EGR? or SCR?
in addition LP? or HP?
- Fuels
View Points
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MACHINERY & ENGINE CO., LTD. All Rights Reserved. 2
Improvement of Engine efficiency
Technical changes
Low speed / Super long
stroke
High Pressure
(High Pmax/Mep ratio)
Reduction of heat loss
(Mech and Heat)
Reduction of pressure loss
(Scav. and Exh.)
Improvement of fuel
injection system (fuel valve
arrangement, fuel injection rate ctrl,
reduction of press. loss, etc.) New Generation Engine
UEC50LSH-Eco
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MACHINERY & ENGINE CO., LTD. All Rights Reserved. 3
Equipment of red figure / red frame : under development
Main engine + MEET package
ORC MERS
Waste heat recovery equipments
Hybrid turbocharger New
exhaust gas economizer
VTI turbocharger UEC Eco-Engine
Electric steering
gear
Electric deck
machinery
Electric deck crane
MAP Mark-W (65sets)
(62 sets)
(13 sets)
(12 sets) (87 sets)
(102 sets)
Electric assist turbocharger
MALS (Mitsubishi Air Lubrication System)
MTA blower for MALS
(8 sets)
Sep. 2015
Project “MEET” Activity
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MACHINERY & ENGINE CO., LTD. All Rights Reserved. 4
IMO-NOx Tier III : LP-EGR
＜System Overview＞
Low Pressure EGR system
– EGR gas line is branched after Economizer.
– EGR Scrubber/Demister/EGR Blower are
installed on engine.
– EGR gas line is connected with EGR
Scrubber.
Fuel oil can be used HFO.
(LSA-oil is also available.)
For using scrubber water continuously, Water
Treatment System is needed on ship-side.
＜Result and Performance＞
NOx reduction rate 80％ was confirmed
⇒ Now carrying out onboard durability
confirmation
＜System Outline＞
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MACHINERY & ENGINE CO., LTD. All Rights Reserved. 5
＜System Overview＞
After Turbocharger (Low Pressure) SCR system
at low exhaust temperature – SCR gas line is
branched before Economizer
Exhaust gas temperature is risen up in SCR
operation with engine tuning.
Fuel oil is LS A-oil(MDO, MGO)
Catalyst of most upstream layer will be replaced
every 5 years (2 docks interval), then OPEX is
minimized.
After burner for heating regeneration is option.
＜Result and Performance＞
Onboard test had been carried out in SCMD
project, confirmed NOx reduction rate over 80％
stably.
＜System Outline＞
IMO-NOx Tier III : LP-SCR