YANMAR SCR Technology for IMO Tier III · ・Urea is deposited on the pipe surface ⇒Keep injection nozzle away from wall. ・Distribution of NH3 is biased at inlet of the catalyst

12th Oct. 2018YANMAR CO., LTD.

YANMAR SCR Technology for IMO Tier III

© YANMAR Co., Ltd.

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© YANMAR Co., Ltd.

●Introduction

●About YANMAR SCR system-History of YANMAR SCR technology development-Outline of YANMAR SCR system-Certification of SCR System-YANMAR SCR line up & delivery record-SCR for main engine

●Summary

Agenda

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© YANMAR Co., Ltd.

●Introduction


●Summary

Agenda

Transition of environmental regulations

© YANMAR Co., Ltd.

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Introduction

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IMO-1

IMO-3

IMO-2

Schedule (year)

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80% NOx reduction from Tier1

2018

NOx reduction technology for IMO Tier3

© YANMAR Co., Ltd.

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Introduction

The reason why choosing SCR1. NOx reduction level is the highest.2. Exhaust gas temperature at engine outlet is higher

compared with 2-stroke engine.3. Few influence to engine performance.

YANMAR selected SCR technology to comply IMO Tier3

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© YANMAR Co., Ltd.

●Introduction


●Summary

Agenda

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© YANMAR Co., Ltd.

●Introduction


●Summary

Agenda

History of SCR technology development

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© YANMAR Co., Ltd.

2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Basic technologydevelopment

Endurance test(Phase 1)



On-board test(Phase 1)

On-board test(Phase 2)

Research results ofOff-road Diesel

History of SCR technology development

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© YANMAR Co., Ltd.

We began developing base technologies of SCR since 2007.

We have experienced 3 times Endurance test and 2 times On-Board test.

Endurance test (on land)Elemental technology development such as

catalyst deterioration and verification of control logic.

On-Board testDemonstration of the durability of the whole system and the catalyst life.

Verification of SCR system operation method such as maintenance.

On-board test of SCR systemHistory of SCR technology development

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Within supposed ECA

Without supposed ECA

Fuel(on MGO test) MGO HFO

Fuel(on HFO test) HFO HFO

IMO regulation Tier3 Tier2SCR operation ON OFFExhaust gas line SCR Bypass

Demonstration of the durability of the whole system and the catalyst life. Verification of SCR system operation method such as maintenance.

Onboard Test of SCR SystemHistory of SCR technology development

© YANMAR Co., Ltd.

Performance at the end of the test ⇒ NOx reduction rate > 80%

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浄化率

浄化率

浄化率（％）

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試験終了時の最終性能（燃料：LSA）⇒全号機共、NOx浄化率＞80％

#1 Gen. #2 Gen. #3 Gen.

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%

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© YANMAR Co., Ltd.

●Introduction


●Summary

Agenda

Reactor design concept

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Outline of YANMAR SCR system

SCR reactor

© YANMAR Co., Ltd.

・Urea injection nozzle is installedon the downstream of the branchto prevent Urea leak to the bypass side.

⇒ More safety design for the crew.

・SCR reactor was unitized frombypass branch to catalytic reactor.And Integration of catalytic reactor and bypass line.

⇒ No need for bypass line pipe space.

Integratedbypass line

・The junction part of bypass line andcatalyst line is designed to preventdeterioration of catalyst due to backflow of exhaust gasduring bypass operation

⇒ Longer life of catalyst.

CatalystBypass

Integrated control

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© YANMAR Co., Ltd.

・All equipments including catalytic reactor are auto controlledintegrally by control panel.

1 Control panel and 1 pump unit can operate multiple SCR

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© YANMAR Co., Ltd.

・SCR reactor and nozzle unit should be installed for each engine.But 1 control panel and 1 pump unit are installed per 1 vessel.

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© YANMAR Co., Ltd.

●Introduction

●About YANMAR SCR system-History of YANMAR SCR technology development-Outline of YANMAR SCR system-Certification of SCR system-YANMAR SCR line up & delivery record-SCR for main engine

●Summary

Agenda

Certification of SCR system

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© YANMAR Co., Ltd.

YANMAR SCR system is certificated by Scheme A.⇒ On-board performance is more reliable.

In “Scheme B”, the engine andSCR are certified respectively.

After that, SCR is fitted to engine,and the engine and SCR system istested for verification on-board

In “Scheme A”, the engine and SCR systemare tested for certification, as one unit, on the test bench.

SCR manufacturer

Engine manufacturer

Certified SCR

Certified Engine

Deriver to S/Y

Deriver to S/Y

Verification of performance on-board

Bench test of SCR system

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Certification of SCR system

© YANMAR Co., Ltd.

© 会社名作成日：YYYY/MM/DD

Catalytic reactorwith Bypass Line

Urea water Tank

Engine

Control panel

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© YANMAR Co., Ltd.

●Introduction


●Summary

Agenda

YANMAR SCR system line up (for Auxiliary engines)

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© YANMAR Co., Ltd.

※Please contact us for more details.

For medium speed diesel engines with 355 to 4800 kW.

YANMAR SCR delivery record

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Delivery record: 150 unitsNumber of orders in hand: 80 units scheduled for this year

Catalytic reactor Shop test of Urea dosing systemat Amagasaki factory

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© YANMAR Co., Ltd.

●Introduction


●Summary

Agenda

SCR for main engine

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© YANMAR Co., Ltd.

SCR for main engine

Offshore shipsOffshore ships Fishing BoatFishing Boat

Patrol boatPatrol boatTraining shipTraining ship

The engine room of these vessels is smallerthan the Ocean-going Vessel.

We prepare SCR system not only for Auxiliary engine but also for Main engine.

Our main engine is installed on following vessels mainly.

Difference of SCR reactor between auxiliary engine and main engine

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© YANMAR Co., Ltd.

SCR for main engine

SCR reactor for Auxiliary engine(with bypass)

SCR reactor for Main engine(without bypass)

・Longer catalyst life

・Redundancy

・Space saving withbypass pipe

・No change in back pressure outside the ECA

・Short size

・Flexibility of piping(1 bend allowing)

In the case of vessel with small engine room, flexibility of piping is required.

Bending pipe of SCR

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SCR for main engine

Concern

・Urea is deposited on the pipe surface⇒Keep injection nozzle away from wall.

・Distribution of NH3 is biased at inlet of the catalyst.And NOx reduction rate is decreased.⇒Sufficient catalyst volume.

We are studying methods to predictthese factors more accuratelyby using 3D model analysis.

urea injection nozzle

Bending pipe of SCR

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SCR for main engine

Concern・Urea is deposited on the pipe surface

⇒Keep injection nozzle away from wall.・Distribution of NH3 is biased at inlet of the catalystand NOx reduction rate is decreased.⇒Sufficient catalyst volume.

Prediction by using 3D model analysis (Software：FIRE v2017)

Input

・Dimensions and materialsof reactor

・Spray conditions

・Exhaust gasconditions

Droplet velocitySpray cone angleParticles size distribution etc.

Mass flowTemperaturePressure etc.

・Catalyst parameterSizeCPSIPressure drop etc.

Bending pipe of SCR

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SCR for main engine

Output・Catalyst inlet condition

・Spray Wall Film Formation

・Wall temperature

NH3 uniformity etc.Wall film mass balance etc.

Concern・Urea is deposited on the pipe surface

⇒Keep injection nozzle away from wall.・Distribution of NH3 is biased at inlet of the catalystand NOx reduction rate is decreased.⇒Sufficient catalyst volume.

Prediction by using 3D model analysis (Software：FIRE v2017)

High possibility of deposition when wall film is formed and wall temperature is lower.

Bending pipe of SCR

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SCR for main engine

We have improved analysis accuracy by conducting verification test.

Actual deposit of Verification testWall temperature and Wall film formation of analysis

On verification test,we increased the urea water injection quantity intentionally to deposit urea.

Variation of SCR reactor for main engine

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SCR for main engine

Multiple types of reactor are available depending on usage

Yellow：Yanmar supply

Variation of SCR reactor for main engine

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SCR for main engine

Multiple types of reactor are available depending on usage

Yellow：Yanmar supply (※Bend pipe is shipyard supply)

Bending type is also the same as Straight type

1 Control panel and 1 pump unit can operate multiple SCR

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SCR for main engine

© YANMAR Co., Ltd.

Combination of main engine and auxiliary engine is also possible.

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© YANMAR Co., Ltd.

●Introduction


●Summary

Agenda

SCR systems are best matched with

the respective engines.

One control panel and pump unit

integrate multiple devices.

It realized compact and simple system.

Engine and SCR system will be

certificated as IMO tierⅢ compliant

according to the Scheme A procedure .

Now developing SCR for main engine

based on customer's needs.

Summary

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In-house developed SCR system with high reliability and durability

Documents

YANMAR SCR Technology for IMO Tier III · ・Urea is deposited on the pipe surface ⇒Keep injection nozzle away from wall. ・Distribution of NH3 is biased at inlet of the catalyst