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

© MAN B&W Diesel

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

© MAN B&W Diesel

p

2

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)

© MAN B&W Diesel 3

NOx limits for new build enginesg

© MAN B&W Diesel 4

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

© MAN B&W Diesel 5

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

© MAN B&W Diesel

T/C matching

Tier II Engine Actionsg

© MAN B&W Diesel

Tier II Engine Resultsg

© MAN B&W Diesel

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

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 )

© MAN B&W Diesel

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

© MAN B&W Diesel 11

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

© MAN B&W Diesel 12

Water Emulsion

© MAN B&W Diesel 13

WIF Unit - MechanicalU

© MAN B&W Diesel 14

High Pressure Water Injection Unitg j U

© MAN B&W Diesel 15

SAMS

© MAN B&W Diesel 16

SAM SystemS Sy

© MAN B&W Diesel 17

SAMS

© MAN B&W Diesel 18

Exhaust Gas RecirculationG

© MAN B&W Diesel 19

Exhaust Gas RecirculationG

© MAN B&W Diesel 20

Exhaust Gas RecirculationG

© MAN B&W Diesel 21

CGR ValveCG

© MAN B&W Diesel 22

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 )

© MAN B&W Diesel

survey. Renewal survey is every 5 years)

<23>

SOx and Particulate MatterSO

Particulate Matter regulated by Sulphur contentof fuel

HFO still allowed

Alternative measures (scrubbers) allowed

© MAN B&W Diesel 24

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

© MAN B&W Diesel

02000 2005 2010 2015 2020 2025

Year

25

MAN B&W Two-stroke Engines& g

© MAN B&W Diesel