tier ii iii (dmu) · · 2016-04-12imo tier i ii & iiiimo tier i, ii & iii © man b&w...
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![Page 1: Tier II III (DMU) · · 2016-04-12IMO Tier I II & IIIIMO Tier I, II & III © MAN B&W Diesel . ... © MAN B&W Diesel 2. ... For MAN B&W two stroke engines,Tier II will be met by](https://reader035.vdocuments.us/reader035/viewer/2022081417/5afcc66d7f8b9a8b4d8ca89d/html5/thumbnails/1.jpg)
Engine emissions and compliance withIMO Tier I II & III
Engine emissions and compliance withIMO Tier I II & IIIIMO Tier I, II & IIIIMO Tier I, II & III
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Review of MARPOL Annex VI and The NOx Technical CodeO C
Main points:
New NOx limits, Tier II & III (New engines)
NOx limits for existing engines (pre-2000 engines)
SOx/PM (Particulate Matter), new limits, ( )alternative methods (all engines)
NOx Technical Code updates
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p
2
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IMO Tier II
Two tier approach:Two tier approach:
Tier II 1st January 2011 (keel laying)y ( y g)Achieved by in-engine measures
Ti III 1 t J 2016 (k l l i )Tier III 1st January 2016 (keel laying)Advanced NOx reduction methods(only in defined Emission Control Areas ECAs)(only in defined Emission Control Areas, ECAs)
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NOx limits for new build enginesg
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NOx components and parameters, examplesp p p
NOx influencingcomponents examples
Performance parameterscomponents, examples
PistonCylinder liner
Maximum cylinder pressureMaximum compressionCylinder liner
Fuel valve nozzle
Maximum compressionpressure
Scavenge air temperatureFuel valve nozzleFuel and exhaust camsECS check sums
Scavenge air temperatureExhaust gas back pressure
ECS check sums+ others
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How to meet Tier II
For MAN B&W two stroke engines,Tier II will be met by internaloptimisation of combustion process:
Injection timing
Fuel injection pressure
Fuel injection rate (injection profile shaping)Fuel injection rate (injection profile shaping)
Fuel nozzle flow area
Exhaust valve timing
Cylinder compression volume
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T/C matching
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Tier II Engine Actionsg
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Tier II Engine Resultsg
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6S60ME-C parameter test 75% load6S60 C p 5%
2.0
3.0SFOCNOx
0.0
1.0
2.0
-2.0
-1.0
+10mm sh
ims
10mm sh
ims
10mm sh
ims
+10mm shim
s+10
mm shims
10mm sh
ims
10mm shim
s10
mm shim
s10
mm shim
s
g/kW
h
Diesel Dilemma
-4.0
-3.0
+
+25bar
+10bar
Pmax +10
Step+25
bar Phyd
+10 -1
5% ar
ea+1
-23% ar
ea +1
-23% ar
ea +25
bar +
10
23% ar
ea Sq.prof +
25bar
+10
-23% ar
ea, Step
3 +25bar
+10
-36% ar
ea +25
bar +
10
-23 -2© MAN B&W Diesel
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Summary, Performance parametersS y, p
For large two stroke engine the general trade off betweenFor large two stroke engine, the general trade-off between SFOC and NOx reduction:
1% SFOC penalty for each 10% NOx reductionp y
Large potential for optimising engines, utilising different SFOC/NOx trade-off
For complying with IMO Tier 2, more benefit for ME/ME-C & ME-B models than MC/MC-C (More flexible and lower SFOC - about 2g/kwh)g )
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Tier III
Review of Tier III entry date, start 2012 and no later 2013
Not To Exceed (NTE). NOx at individual load points in the E2/E3 cycle not to exceed limit by more than 1.5
Certification of after treatment systemsCertification of after treatment systems
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Tier III candidate technologygy
Tier III candidate technology:
WFE (Water/Fuel Emulsion)
SAM (Scavenge Air Moistening)SAM (Scavenge Air Moistening)
EGR (Exhaust Gas recirculation)
SC (S C )Turbochargercompressor outlet
S t
Turbochargercompressor outlet
S tSCR (Selective Cathalytic Reduction) Seawaterinjectors
Freshwaterinjectors
Seawaterinjectors
Freshwaterinjectors
Fresh water drain
Flow changecyclone waterseparator
WMC Sea water drain
Fresh water drain
Flow changecyclone waterseparator
WMC Sea water drain
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Water Emulsion
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WIF Unit - MechanicalU
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High Pressure Water Injection Unitg j U
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SAMS
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SAM SystemS Sy
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SAMS
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Exhaust Gas RecirculationG
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Exhaust Gas RecirculationG
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Exhaust Gas RecirculationG
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CGR ValveCG
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Regulation of pre-2000 enginesg p 000 g
Based on MEPC57 the following is decided and approved:
Engines are limited to:
• installed on ships built 1st January 1990 to 31st December 1999installed on ships built 1st January 1990 to 31st December 1999
• and with a per cylinder displacement at or above 90 litres
• and with a rated output at or above 5000kW
• and if a ’Kit’ or ’Approved Method’ is available (at first renewal
R l i 5 )
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survey. Renewal survey is every 5 years)
<23>
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SOx and Particulate MatterSO
Particulate Matter regulated by Sulphur contentof fuel
HFO still allowed
Alternative measures (scrubbers) allowed
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Proposed CARB regulationp C g
MEPC 57 IMO & CARB Fuel-Sulfur Content Limits
4
4.5
5
Global: 4 5 → 3 5 → 0 5 Gl b l
3
3.5
4
%
Global: 4.5 → 3.5 → 0.5
SECA: 1.5 → 1.0 → 0.1
CARB MGO: 1,5 → 1.5 → 0.1 (DMA)
CARB MDO: 2 0 → 0 5 → 0 1 (DMB)
Global
1.5
2
2.5
Sulfu
r CARB MDO: 2.0 → 0.5 → 0.1 (DMB)
SECA
0
0.5
1
CARB Phase 2CARB Phase 1
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02000 2005 2010 2015 2020 2025
Year
25
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MAN B&W Two-stroke Engines& g
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