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Tokyo Tripartite Meeting. Developments on Engine Technologies to reduce the Emissions. 2010.10.14. Kazutaka Shimada (Mitsui Engineering & Shipbuilding Co., Ltd) Large size engine’s Technical Committee JSMEA (Japan Marine Equipment Association). 1. Contents.

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slide1

Tokyo Tripartite Meeting

Developments on Engine Technologies to reduce the Emissions

2010.10.14

Kazutaka Shimada

(Mitsui Engineering & Shipbuilding Co., Ltd)

Large size engine’s Technical Committee

JSMEA (Japan Marine Equipment Association)

1

contents
Contents

Introduction - revised MARPOL Annex VI

Measures to comply with NOx regulation- IMO NOx Tier II- IMO NOx Tier III

Measures to reduce GHG Emission - WHR (Waste Heat Recovery)- Scavenging Air Control Technologies

contents3
Contents

Introduction - revised MARPOL Annex VI

Measures to comply with NOx regulation- IMO NOx Tier II- IMO NOx Tier III

Measures to reduce GHG Emission - WHR (Waste Heat Recovery)- Scavenging Air Control Technologies

revised marpol 73 78 annex vi
Revised MARPOL 73/78 ANNEX VI

NOxRegulation

SOx + PM Regulation

(Sulfur Control Only)

GlobalECACurrent 4.50% 1.50%2010.07.01 ↓ 1.00% 20123.50% ↓2015 ↓ 0.10%2020 0.50% ↓

Tier ITier IITier III 2000~ 2011~ 2016~

n<130 17.0 14.4 3.4

130<=n<2000 45*n-0.2 44*n-0.23 9*n-0.2

n>=2000 9.8 7.7 2.0

n : Engine speed min-1

Review of Fuel Availability in 2018

-15%

Tier II

-21%

-80%

Tier III

Local Area(ECA)

1st-July

contents5
Contents

Introduction - revised MARPOL Annex VI

Measures to comply with NOx regulation- IMO NOx Tier II- IMO NOx Tier III

Measures to reduce GHG Emission - WHR (Waste Heat Recovery)- Scavenging Air Control Technologies

measures to comply with imo nox tier ii
Measures to comply with IMO NOx Tier II

For Tier II compliant Engines, In-Engine Technology, which has adverse impact on SFOC, is applied.

  • 2st Miller Cycle
  • Optimum Fuel Injection Profile
  • New components design
2 stroke miller cylce
2 Stroke Miller Cylce

Ref. CIMAC Paper No. 205, Prof. Takasaki

injection profile to optimize the emissions
Injection Profile to optimize the emissions

The fuel injection rate control can improve SFOC-NOx trade-off.

-3g/kWh at 100% on Tier II compliant ME Engine

candidate technology for imo nox tier iii
Candidate Technology for IMO NOx Tier III
  • WIF (Water In Fuel Emulsion)
  • HAM (Humid Air Motor)
  • EGR (Exhaust Gas Recirculation)
  • SCR (Selective Catalytic Reduction)
  • 2-Stage Turbocharging
nox tier iii egr
NOx Tier III ~ EGR ~

Turbocharger

Scrubber

EGR Blower

Air cooler

+ WMC

EGR Cooler + Water Mist Catcher (WMC)

Scrubber

Cooler,WMC

EGR Blower

Air cooler + WMC

nox tier iii scr
NOx Tier III ~ SCR ~

Common Challenge:

Low Temperature

S content in Fuel

Urea Quality

Before T/C

After T/C

  • Response of T/C
  • New Catalyst
  • Recovery of catalyst (after burner)

Deterioration of Catalyst

scr guideline ntc 2008
SCR Guideline : NTC 2008

1. The engine shall be tested, at the pre-certification test, with the NOx reducing device fitted. (2.2.5.1)

There are engines which, due to their size, construction and delivery schedule, cannot be pre-certified on a test bed. (2.2.4)

2. In such cases, the applicant must demonstrate to the Administration that the onboard test fully meets all of the requirements of a test-bed procedure as specified in chapter 5 of this Code. (2.2.4)

Due to the technical difficulties of on-board measurement, the same accuracy of the measurement at the test-bed is hard to perform on-board.

3. In those cases where a NOx reducing device has been fitted due to failure to meetthe required emission value at the pre-certification test,the effectiveness of the NOx reducing device isverified by use of the Simplified Measurement method. (2.2.5.2)

The engine with NOx reducing device shall not be accepted for Engine Family or Engine Group certification. (2.2.5.4) Individual Engine

4. Notwithstanding 2.2.5.3 and 2.2.5.4, a NOx reducing device may be approved by the Administration taking into account guidelines to be developed by the Organization.

scr guideline scheme b
SCR Guideline : Scheme B

Scheme B is more Accurate for the Reference Conditions

Engine

Measured NOx Emission at the Reference Condition

Demonstrate the compliance at the reference condition by the calculation

SCR Unit

Verification of NOx Reduction Ratio

NOx Reduction Ratio at the Reference Condition

On-Board

Test Bed

scr guideline
SCR Guideline

Advantage to develop the Scheme B:

  • Smooth Enforcement of IMO NOx Tier III
  • Robust Certification Procedure at the Reference Condition
  • Optimum Manufacturing Cost
  • Robust On-Board Verification (Parameter Check Method)- Engine - SCR
  • Flexible Scope of Supply of SCR (including engine maker)
  • Retro-Fit possibility of SCR in case of major modification
nox tier iii two stage turbocharging
NOx Tier III ~ two stage turbocharging ~

Ref. MAN Diesel & Turbo HP

Ref. CIMAC Paper No. 293

nox tier iii time frame
NOx Tier III Time Frame

Only 1.5 year is remained until Tier III Technical Review !

NOx Tier II Start

New Technology Development takes time

NOx Tier III Technical Review

Design

Shop Test

Service Test

SOx ECA =0.1%

NOx Tier III Start

Commercial Release

Fuel Availability Review

contents17
Contents

Introduction - revised MARPOL Annex VI

Measures to comply with NOx regulation- IMO NOx Tier II- IMO NOx Tier III

Measures to reduce GHG Emission - WHR (Waste Heat Recovery)- Scavenging Air Control Technologies

whr waste heat recovery
WHR (Waste Heat Recovery)

Heat utilization

Power utilization

Whole Technologies using the surplus energy of the Exhaust Gas.

Waste HeatRecovery

slide19

Generator

WHR~ TES (Thermo Efficiency System) ~

Boiler

Power Turbine(PT)+Steam Turbine(ST)+Generator+Shaft Generator / Motor

Grid

PT

ST

app. 9%

Shaft Generator&Motor

Control Box

whr tgu hybrid t c
WHR ~ TGU & Hybrid T/C ~

DE

DG

TC

TCG

TC

TCG

TGU(Turbo Generator Unit)

TC+High Speed Generator

((Relatively Smaler Space Requirement)

Boiler

船内需要

ST

STG

同期

HybridTurbocharger

Main

SM

Engine

ghg reduction
GHG Reduction

Scavenging Air Control

Measures to improve SFOC by increased trapped air amount and increased Pmax in partial load.

  • VT (Variable Turbine)
  • TC Cut (Large Engine)
  • Sequential Turbocharger
  • Exhaust By-Pass
  • ME Engine Control Tuning
scavenging air control

160

① Increase Scavenging Pressure : Ps

Pmax

② Increase Compression Pressure : Pcomp

140

Pcomp

Scavenging Air Control

③ Increase Cylinder Maximum Pressure : Pmax

120

Pmax/Pcomp(barg)

100

④ Improve Engine Efficiency in the part load

80

Pscav

4

3

60

Ps(bara)

2

40

1

20

0

50%

60%

70%

80%

90%

100%

vt variable turbine
VT (Variable Turbine)

VTA Open

VTA Close

アクチュエータユニット

可変ノズル

ガス入口ケーシング

Features of Variable Turbine Area

Reduce CO2 (SFOC) Emission in the part load

Improve NOx – CO2 trade-off

Improve engine reliability due to the increase of air amount in the part load

Decrease heat load in tropical condition

Retro-Fit possibility

one turbo charger cut
One turbo charger cut

Exhaust gas receiver

Exhaust gas receiver

Exhaust gas receiver

Cooler

Cooler

Cooler

Cooler

Cooler

Cooler

Scavenging air receiver

Scavenging air receiver

Scavenging air receiver

No of TC/Eng max. LoadContinuous Operation

1 15% ×

2 50% 35%

3 67% 66%

4 75% 68%

× Emergency Use Only

sequential tc
Sequential TC

T

: TURBINE

: BLOWER

B

Sequential Turbocharger

Sequential Turbocharger is the turbocharging System to change the combination of the turbochargers in accordance with the engine load. High Load: Large + Small T/C

Low Load : Only Large T/C

Exh. GasReceiver

Exh. Gas Receiver

Closed

Open

V1

V1

Large T/C

Large T/C

Small T/C

Small T/C

T

T

B

B

B

B

T

T

TO FUNNEL

TO FUNNEL

Open

Closed

Open

Closed

TO OUTSIDE

V3

V2

V3

V2

TO OUTSIDE

Scav. Air Manifold

Scav. Air Manifold

Low Load

Only Large T/C(Stop Small T/C)

High Load

Large T/C & Small T/C

summary of today s presentation
Summary of Today’s Presentation
  • NOx Tier II Compliant Engines have been available by applying in-engine technologies.
  • NOx Tier III Compliant Engines need further development.
  • In case of SCR, the certification procedure in accordance with NTC 2008 may need further development. (Scheme B)It will discuss in next BLG meeting.
  • WHR (Waste Heat Recovery) and Scavenging Air Control Technologies are introduced for reducing GHG emission from the ships.