Tier III technology for UE engine

LP-EGR system

Mar. 2023

Japan Engine Corporation© 2023 Japan Engine Corporation

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WMS-H756

Mar. 2023

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NOx emission control area（ECA）
The emission regulations of IMO for NOx and sulfur content in fuel are getting strict year by year.
As for the NOx regulation, from 2011 Tier II regulation is in effect.
As the result of MEPC66, from 2016 Tier III regulation became into effect.
Its level is over 75% less than that of Tier II inside of ECA. Outside of ECA its emission level issame as Tier II.

＜NOx-ECA＞（2021～）

Existing ECA© 2023 Japan Engine Corporation

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WMS-H756

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1. NOx Tier

IMO NOx Tier III Solutions

UEC engine complies with IMO NOx Tier III regulation

by LP-EGR, HP-SCR or LP-SCR system, which has the enough ability
to reduce NOx emission for the regulation.

①METHODS IN-ENGINE- EGR (Exhaust Gas Recirculation)②AFTER TREATMENT- SCR (Selective Catalytic Reduction)© 2023 Japan Engine Corporation

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WMS-H756

Mar. 2023

Unauthorized reproduction and copying prohibited3Contents
1

Design Concepts

2

Development and delivery records of LP-EGR

3

Overview of J-ENG LP-EGR System© 2023 Japan Engine CorporationConfidential

WMS-H756

Mar. 2023

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Design Concepts
 Simple SystemSimple configuration and components, due tolow press. and low temp.
J-ENG Zero-Bleed-off system will contribute to thereduction of environmental load.

 Simple Operation and Control
Operation is executed by an ON/OF control of the EGRvalves. (within 5 minutes)
Good response and stability in the maneuveringand for load fluctuation in heavy weather

 High performance
Minimum SFOC deterioration, complying with NOx Tier3
regulation.
Verified high reliability of engine parts and EGR
components through the bench test and on-board test

【6UEC50LSH-Eco-C3-EGR】

Completely in-house developed technology

 Low CAPEX and OPEX

Low installation works with a simple configuration
Low maintenance costs
Enjoy low fuel costs, acc. to the advantage of low SFOC

© 2023 Japan Engine CorporationConfidential

WMS-H756☆

All knowledge and experience gained during
the development process have been utilized☆

No black box, quick response in case ofemergency
Mar. 2023

Unauthorized reproduction and copying prohibited5

Contents
1

Design Concepts

2

Development and delivery records of LP-EGR

3

Overview of J-ENG LP-EGR System© 2023 Japan Engine Corporation

Confidential

WMS-H756

Mar. 2023

Unauthorized reproduction and copying prohibited6

LP-EGR Development / Delivery Record
As of Mar. 2023
2011

2012

Fundamental
test

2013

2014

Test Eng.

EGR：370h

2015

2016

2017

2021

2020

2019

2018

On-Board Test

EGR(commercial)

EGR：860h

EGR：150h
6-50LSH-Eco★2020-12/
7-60LSE-Eco

5UEC50LSJ-EGR
6UEC45LSE-Eco-B2-EGR[Verification items]☑ Engine performance (NOx, SFOC)☑ Reliability and performance of size-down EGRequipment☑ Reliability and performance of water treatment
equipment☑ Reliability of engine components(Combustion chamber parts, T/C, A/C, etc)

7UEC60LSE-Eco-A2-EGR[Verification items]☑ Engine performance (NOx, SFOC)☑ Functions and performance of water treatment system☑ Long-term reliability of equipment(Combustion chamber parts, T/C, A/C, WTS, etc.)© 2023 Japan Engine Corporation

Confidential

2023

In Service★2020-11/

4UEC60LSE-Eco-B2-EGR

2022

WMS-H756★2021-9/ 6-60LSE-Eco★2021-9/ 6-50LSH-Eco★2021-11/ 6-50LSH-Eco★2022-1/ 6-42LSH-Eco★2022-2/ 6-60LSE-Eco★2022-2/ 6-42LSH-Eco★2022-4/ 6-42LSH-Eco★2022-5/ 6-50LSH-Eco★2022-5/ 6-42LSH-Eco★2022-6/ 6-50LSH-Eco★2022-8/ 6-50LSH-Eco★2022-10/ 6-50LSH-Eco★2022-10/ 6-42LSH-Eco★2022-12/ 6-42LSH-Eco★2022-12/ 6-42LSH-Eco★2023-2/ 6-50LSH-Eco★2023-3/ 6-42LSH-Eco(Eng. deli.: Apr.2023) 6-42LSH-Eco★
(Eng. deli.: May.2023) 6-50LSH-Eco★
(Eng. deli.: Jun.2023) 6-42LSH-Eco★
★
★★★
★★★★
★ ★
★
Ordered and expected orders : over100 sets★
★
Delivered : 19 sets★

Mar. 2023

Unauthorized reproduction and copying prohibited

7

Contents
1

Design Concepts

2

Development and delivery records of LP-EGR

3

Overview of J-ENG LP-EGR System© 2023 Japan Engine Corporation

Confidential

WMS-H756

Mar. 2023

Unauthorized reproduction and copying prohibited8

LP-EGR System
EGR operation (NECA)

Non-EGR operation (Global Area)
Non-EGR operation is same as

A part of exhaust gases is recirculated to engine.

conventional engine (Tier2).

Scavenging : mixture of air and recirculated exhaustgas (O2 concentration≒16 to 19%)

Scavenging air (O2 concentration≒21%)

Because of higher combustion temperatures,
NOx emission is high.

Slow speed combustion results in low thermal-NOxemission.

The mode can be changed
from the Eco engine control panel※

O2 sensor calibration required before EGR operation(Press the calibration button on the touch panel)High NOx emission

Low NOx emission

Close

OpenBlowerONBlowerOFFO2≒16 ~ 19%

O2≒21%

Close© 2023 Japan Engine Corporation

Confidential

Open

WMS-H756

Mar. 2023

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9Latest configuration of LP-EGR system
Notes
CTU: Collecting Tank Unit
DWC: Drain Water Chamber
SCWR: Scrubbing Water Receiver
WCU: Water Cooler Unit
WTU: Water Treatment Unit

EGR gas system
EGR gas inlet valve

Turbocharger

EGR gas outlet valve

EGR scrubber

EGR blower

Demister
Air cooler
Coolingsea water
Specific gravity

Padjustment

SCWR
DWCP© 2023 Japan Engine Corporation

Confidential

E/S
E/R

Remarks
Equipment mentioned
in red color are not in thescope of supply fromengine builder.

NaOHtank

Scrubbing water system
WMS-H756

Residue(waste)
P tankHandle with care

Fromgeneralwater tankMar. 2023

Discharge(to bunker station)

Unauthorized reproduction and copying prohibited

10Main Function of Major Equipment：EGR gas system④① EGR gas system⑤②③

Scrubbing water system

EGR gas system

Function①EGR gas inlet valve

During Non-EGR mode, prevention of exhaust gas infiltration②EGR scrubber

Spraying scrubbing water to exhaust gas (EGR gas), removal of soot particles and sulfur contents③Demister

Water (mist) separation of EGR gas④EGR blower

Transfer of EGR gas to turbocharger compressor⑤EGR gas outlet valve

Prevention of EGR gas to engine incase of emergency stop of EGR system© 2023 Japan Engine Corporation

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11Main Function of Major Equipment：Scrubbing water system
LP-EGR system basically does not
require the addition of fresh water.

④⑤①
②
③⑦

In LP-EGR system, scrubber water iscirculated and used, and the scavenging
drain is also collected and replenishedand reused as scrubber water.

⑥

Even above, add fresh water only if thescrubber water is insufficient.

Scrubbing water system

Function①Scrubbing water receiver (SCWR)

Collecting scrubber water stored in demister and transferring it to ③CTU

②Drain water chamber (DWC)

Collecting of air cooler drain and reusing it as scrubbing water.

③Collecting tank unit (CTU)

Storing the scrubbing water④Water cooling unit (WCU)

Cooling of scrubbing water by heat exchanger using sea water・・・Plate type heat exchanger is equipped⑤Water treatment unit (WTU)

Removal of residue (waste) particles (soot) from scrubbing water・・・Centrifuge is equipped⑥Residue (waste) tank

Storing of centrifugal separator residue (waste)（under shipyard’s jurisdiction）⑦Caustic soda aqua solution (NaOH) tank unit

Supplying neutralizer for scrubbing water（ under shipyard’s jurisdiction ）© 2023 Japan Engine Corporation

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12

Installed LP-EGR system
EGR gas system
EGR Gas Inlet Valve
EGR Gas Outlet ValvePDWC
EGR Blower
P

Scrubbing water system© 2023 Japan Engine Corporation

ConfidentialE/S
E/R

NaOHtank

WMS-H756

Removedresidue
P tankDischarge(to bunker station)

Mar. 2023

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Thank you

Japan Engine Corporation
1, Minamifutami, Futami-cho, Akashi,
Hyogo Pref., 674-0093, Japan
www.j-eng.co.jp© 2023 Japan Engine Corporation

Confidential

WMS-H756

Mar. 2023

Unauthorized reproduction and copying prohibited

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