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Description

A Guideline to the Unified Technical File Regulations for the Prevention of Air Pollution from Ships First Edition,

Preface This booklet is intended for Licensees,

and marine engineers in general to illustrate the Unified Technical File designed for all MAN B&W engines – required to meet the IMO regulation for the prevention of air pollution

The Unified Technical File is a document that specifies a procedure,

mainly based on performance measurements,

by which the operator can verify compliance with the IMO ‘NOx Technical Code’ to the Flag State Authority (or their representative) when the engine is later checked in service

MAN B&W Diesel has designed this booklet partly to explain survey procedures and partly as a lookup manual for IMO definitions

The first part concentrates on survey routines,

from testbed to on board situations (the most important for the operator),

describing the survey from start to finish

The second part expands on specific subjects and how to handle the most common tasks on board,

the spare or reconditioning parts covered by the regulation

Regarding general emission questions or emission control of MAN B&W two-stroke engines,

reference is given to existing material issued by MAN B&W Diesel

Contents A

Guidelines to the Unified Technical File (TF)

16 Summary

Survey Methods

Case Story

Glossary

Local areas

Description of Documents

Parameters in the Document

Reconditioning of engine parts

Responsibilities

Assistance from MAN B&W Diesel

Overview of Survey Routines

A In connection with the International Maritime Organization (IMO) Annex VI of Marpol 73/78 – Regarding the Prevention of Air Pollution from Ships,

MAN B&W Diesel has prepared the following guidelines to a unified technical file

Guidelines to the Unified Technical File (TF) Purpose: 1

To ensure that MAN B&W two-stroke engines are tested and can be surveyed in accordance with IMO Annex VI

To inform shipowners and operators about the TF and how to comply with Annex VI by using the unified MAN B&W Diesel standard

Questions or comments regarding the guidelines should be directed to Dept

Standards and Classification,

Introduction The IMO has introduced a new Annex VI of MARPOL 73/78,

concerning regulation for the prevention of air pollution from ships

Annex VI applies to all engines delivered since 1 January 2000,

and enters into force 19 May 2005

MAN B&W Diesel has worked with the licensees and classification societies to find a uniform design for the TF – required under IMO Annex VI,

in order to survey on board compliance

Many of the first TFs produced by the engine builders varied due to different demands made by the different classification societies

This happened because the IMO Annex VI does not give sufficiently detailed instructions on how to draw-up the TF in practice

MAN B&W Diesel has assumed the task of coordinating the work to prepare a uniform TF,

to be used both by the licensees and the classification societies

The task also includes the necessary procedures for shipowners when later engine adjustments or changes of components have occurred

A Advantages The unified TF means: • Certainty of market acceptance of the TF • Satisfied customers,

who can show engine compliance when checked at sea by the Flag State representatives • A survey method based on principles familiar to the crew • More engines can be accepted within the same engine Group,

meaning reduced expenses • Less money spent on emission measurements

Parent engines can be shared between MAN B&W Diesel and the licensees

This will greatly reduce the number of emission measurements and future certification costs

TF design The principle of the MAN B&W Diesel unified concept is that the defined ‘NOx components’ and performance data (measurement of pmax,

Tscav and pback) can show that an engine complies with the NOx limit

Some licensees have,

used a component setting tolerance instead of performance data

However,

if the operator has adjusted the engine,

the engine might be out of compliance when the engine is later checked by the Flag State for compliance at sea

Only extensive tests on Testbed can validate engine adjustments when component settings tolerances are used

It is important to note that when IMO Annex VI is ratified,

the focus will be on follow-up at sea – where changes and adjustments will take place

Some licensees have selected to use their own developed TF instead of the recommended MAN B&W Diesel common component ID numbers

This will make it much more difficult for the owners to purchase spare parts in the future,

and still stay in compliance with the IMO regulation

It is predicted that some engines already delivered will not be in compliance when they are surveyed

We suggest that all owners who have made changes to their engines contact the manufacturer regarding its status,

before IMO Annex VI comes into force

A Component changes This unified TF will allow changes of the engine’s NOx components,

while maintaining compliance in cases where a shipowner changes components at sea

Some owners have already demanded a unified system in order to avoid working with different TFs

Adjustments The unified TF will allow all adjustments on board within the stated performance parameters

Summary The Unified TF is the standard introduced by MAN B&W Diesel and it is accepted by the classification societies’ headquarters

It should be followed by the licensees for all future engines

A Concept (engine categories) The IMO Annex VI NOx technical code defines three categories of engines: 1

Individual Engines Engine Groups Engine Families

Individual engines are handled on the Testbed in the same way as a Parent engine

However,

a Group definition is not included in the TF

Engine Groups and engine Families consist of a Parent engine and a number of Member engines

All Two-stroke engines can be defined in an engine Group,

either as the Parent engine (representing the Member engines) or as a Member engine

Most of the survey procedures made for the Member engines and the Parent engine application are the same

The difference for Member engines is that the emission testing is not necessary – neither on Testbed nor at sea

Survey Methods The survey methods include Testbed,

Sea Trial and On-board inspections

The flow chart for survey methods has been split up into different sections to make a more detailed description

Refer to Fig

Appendix B in the TF

Survey Start

Survey Type Testbed: Inspection of PreTechnical File (EIAPP) 1

Parent Engine Engine Type

Performance Check: a) measure performance b) measure NOx NOx components Check: c) check fuel nozzle and ECS version d) other NOx components e) verify settings

Adjust Performance and Component approval

No Yes Sign Documents

Survey Finish

The performance parameter check is the basis of the survey methods

The measurements involved are used as reference for Member engines

A change in performance usually means a change in the NOx level

Performance Check: a) b)

measure performance measure NOx

‘NOx component’ Check: c) d) e)

check fuel nozzle and ECS version (for ME engine types) check other NOx components verify settings

Performance and NOx measurements: pmax,

Tscav and pback and NOx measured (and corrected) at the four load points in accordance with the E2/E3 IMO cycle

The Electronic Control System (ECS) software is important for correct operation of the engine and,

To extend the group of engines that can be associated with a Parent engine,

different types of fuel nozzles are tested for different engine types

Approved IMO compliant NOX components are listed in the engine TF (or pre-TF)

The setting values are verified for guidance only and are not a verification of the engine’s actual NOx emission level

The value includes the ‘IMO Chief Checksum’ value on the Main Operating Panel for the ME engine types

The values are to be used only as guideline indications for later adjustments after,

overhauls comprising the fuel cam or exhaust cam position

A survey code is established by data gained from the official Testbed tests in order to ease an on board survey

The results,

cannot be printed until later – together with the EIAPP application with the Parent TF

Survey Type Testbed: Inspection of PreTechnical File (EIAPP) 2

Member Engine Performance Check: a) measure performance b) verify performance

Engine Type

NOx components Check c) check fuel nozzle and ECS version d) other NOx components e) verify settings Print out survey code tables (with EIAPP application) Adjust No Yes Sign Documents

Performance and Component approval Survey Finish

The main difference between surveying Parent and Member engines is that the NOx emission is only being measured for the Parent engine

For the Member engine,

the performance check verifies compliance based on the parent engine NOx data

Performance Check: a) b)

measure performance verify performance (Testbed version)

‘NOx component’ Check: c) d) e)

check fuel nozzle and ECS version (for ME engine types) check other NOx components verify settings

Print out survey code tables

Performance measurements: pmax,

Tscav and pback are measured (and corrected) at the four E2/E3 load points

Verify performance: The survey code (Testbed version),

which is based on the Parent engine data will automatically correct the performance values and perform a NOx estimate when performance measurements and ambient conditions are entered into the program

If the ISO ambient corrected performance values are within the TF specified tolerances,

the engine is in compliance with the IMO regulation

The approved IMO NOx components are listed in the engine TF

The setting values are verified for guidance only,

and are not a verification of the engine’s actual NOx level

The value includes the ‘IMO Chief Checksum’ value on the Main Operating Panel for the ME engine types

The values are to be used only as guideline indications for later adjustments after,

overhauls comprising the fuel cam or exhaust cam position

The survey tables document the survey and are printed for later reference and are included in the Member engine’s TF

Survey on Sea Trial

(without component or adjustment changes) Survey Start

Survey Type 3

Sea Trial Inspection of: Technical File (IAPP) Adjustment or Component Changes No

NOx components Check c) check fuel nozzle and ECS version d) other NOx components (as considered necessary) e) verify settings (as considered necessary) Print out survey tables

Survey Finish

Sign Documents and add to Record Book

A NOx component check is sufficient to verify that the engine is in compliance

All documentation established so far,

TF and eventual Record Book (see Chapter E for definition of Record Book) should be inspected,

and the outcome should be included in the IAPP documentation for later reference on board

‘NOx component’ Check: c) d) e)

check fuel nozzle and ECS version (for ME engine types) check other NOx components (when considered as necessary) verify settings (when considered as necessary)

Print out survey code tables to document compliance

If changes to components or settings were introduced,

see survey method 4 (On board survey)

On-board Survey

(to be used when adjustments have been made to components or settings) Survey Start

Survey Type 4

Onboard Survey Inspection of: Technical File and Record Book Adjustment or Component Changes

Performance Check: a) measure performance b) verify performance (VIT or non-VIT) NOx components Check c) check fuel nozzle and ECS version d) other NOx components (as considered necessary e) verify settings (as considered necessary)

Print out survey tables No Yes

Survey Finish

Performance and Component approval

Sign Documents and add to Record Book

All established documentation (EIAPP,

IAPP and eventual Record Book) must be inspected

The outcome must be filed in the on board Record Book for later reference

Performance Check: a) b)

measure performance verify performance (onboard VIT or non-VIT versions)

‘NOx component’ Check: c) d) e)

check fuel nozzle and ECS version (for ME engine types) check other NOx components (when considered as necessary) verify settings (when considered as necessary)

Print out survey code tables to document compliance

Performance measurements: For engines with VIT,

the 75% load point and one load point above the VIT break point are to be measured

For engines without VIT,

only the 75% load point is measured (the performance data measured are as stated above)

Verify performance: The survey code (on board version),

which is based on the Parent engine data will automatically correct the performance values and perform a NOx estimate when performance measurements and ambient conditions are entered into the program

If the ISO ambient corrected performance values are within the TF specified tolerances,

the engine is in compliance with the IMO regulation

The fuel nozzle,

being the component having most influence on NOx,

must be checked by identification of its ID number,

as well as the ECS version for the ME engine types

The Flag State representative can check other NOx components,

by identification and comparison with the TF component ID numbers

The setting values,

comprising the fuel cam and exhaust cam positions and the ‘IMO Chief Checksum’ values on the Main Operating Panel (for the ME engine types),

when considered as necessary by the Flag State representative

However,

the values are for guidance only

Three versions of the on board survey code exist – depending on the engine fuel pump system (VIT,

The survey tables document the survey and are printed for later reference and included in the ‘Record Book’

Case Story An engine Group was established on the basis of the Parent engine tested as engine No

Member engine No

Parent engine Member engine Member engine (new fuel nozzle tests) Member engine

Two different possibilities exist for maintaining the engine Group certificates: The new fuel nozzle can be added to the TF with an amendment for the nozzle,

but only if the new nozzle demonstrates a lower NOx value than the original fuel nozzle

A new engine Group can be established on the basis of engine No

In this case,

new Member TFs for the previous Member engine need to be established

Engine No

A detailed description of the survey methods can be found in the TF (Chapter 3 and Appendix B)

Glossary IMO Annex VI The IMO Annex VI is a new annex to MARPOL 73/78 – the International Convention for the Prevention of Air Pollution from Ships – and which applies to every ship of 400 gross tons and above

The rules on NOx emission are specified in Conference Resolution 2,

Engines covered by the IMO NOx regulation 1

All diesel engines with an output of more than 130kW and installed in a ship built on or after 1 January 2000

All engines (above 130kW) that undergo a major conversion:

• an engine replaced by a new engine built on or after 1 January 2000 • any substantial modification,

as defined in the NOx Technical Code,

or • the engine rating (MCR) is increased by more than 10% Emergency engines and Navy vessels are not covered by IMO,

and engines entirely for use in internal State waters are not covered if an alternative NOx control measure is applicable

Vessels covered by the IMO SOx regulation All

Emissions regulated NOx: Regulation 13 describes a speed-related IMO NOx limit (from 17gNO2/kWh to 9

SOx: Regulation 14 describes the sulphur limit

The sulphur content of the fuel shall not exceed 4

In defined SOx control areas,

an HFO fuel with equal or less than 1

or an aftertreatment system that limits the exhaust SOx to equal or less than 6gSO2/kWh are required

To document the sulphur content in the fuel,

a new bunker delivery note is required,

accompanied by a representative sample of the fuel oil delivered,

However,

individual countries (Flag States) may have special mandatory or voluntary requirements within local waters,

and certain businesses require information on different emission components

NOx limits The MAN B&W Diesel unified TF specifies three NOx values: 1

The MCR speed-related IMO NOx limit (see previous) 2

The actual Parent engine reference NOx value 3

The actual Parent engine NOx value at maximum tolerance conditions

The last value must be less or equal to the IMO NOx limit to comply with the IMO Annex

However,

the simulated Member engine NOx value must be less than the Parent engine maximum value (with allowed tolerances)

The IMO NOx Technical Code defines three categories of engines 1 Individual engines 2 Engine Groups 3 Engine Families

Engine Groups and Families consist of a Parent engine and a number of Member engines

Large two-stroke engines belong to either category 1 or 2 because of the necessity for adjustments on board

In principle,

most of the survey procedures made for the Individual and the Parent engine application will be the same

The main difference for Member engines is that the emission testing is not required – neither on the Testbed nor at sea

The more engines that can be included in the same engine Group,

the easier and lower the costs for the engine builder

Furthermore,

having a Unified TF will facilitate sharing of engine Groups among MAN B&W Diesel and the engine builders,

Performance parameters Following extensive testing,

MAN B&W Diesel has established the NOx sensitivity of different performance parameters

This knowledge has been utilised to establish the defined allowed maximum IMO tolerances

These tolerances must be met always,

independent of (or in addition to) the specified service tolerances in the instruction books for the engine

Local areas SOx emission control areas (SECA)

IMO defined area with a SOx limit of 1

The Baltic Sea and the North Sea have been defined as special restricted-SOx areas

Required IMO NOx components marking MAN B&W Diesel has defined 12 standard engine components as IMO NOx components that might influence the NOx emission

A listing of the components (including a few major sub supplier components: T/C,

auxiliary blower and the governor) is given in Table 1

The marking position on each component is described in the TF’s Appendix A and is specified in a standard MAN B&W Diesel marking specification

Except for the fuel nozzle,

none of the defined IMO components are easy to replace with a different design and,

are not likely to change the NOx characteristics

Therefore,

if the engine performance is kept within the specified tolerances (see TF Table 1

Only the nozzle ID number might need verification (this is always at the discretion of the surveyor)

For ME engines,

the Electronic Control System (ECS) version and the selected engine mode also need to be surveyed

MAN B&W Diesel has defined the ‘Part Number’ as the IMO ID number for the component

Many of the defined NOx components are already stamped with the part number

Only the main part number is used – not the revision number (see circled number in TF Appendix A

Certified Marking

Marking Instruction

Required Marking

Cylinder liner

Part Mo

0742637-8

Either manufacturer’s Name or Trademark,

Marking is on manoeuvring side

Certified Marking

Cylinder cover Part No

Marking Instruction

Required Marking

0742634-2

Either manufacturer’s Name or Trademark,

Year and Week of manufacture

Marking is on manoeuvring side

Certified Marking

Marking Instruction

Required Marking

Piston crown

Part No

0743260-7

Either manufacturer’s Name or Trademark,

Marking is on manoeuvring side

Certified Marking

Marking Instruction

Required Marking

Fuel pump barrel

Part No

0742843-8

Manufacturer’s Name or Trademark,

Notes On ME engines: The barrel and the plunger are paired

Certified Marking

Marking Instruction

Required Marking

Fuel pump plunger

Part No

0742845-1

Manufacturer’s Name or Trademark,

Notes On ME engines: No marking required

Certified Marking

Marking Instruction

Required Marking

Fuel cam

Part No

0742636-6

Either manufacturer’s Name or Trademark,

Marking is on Bearing side

Exhaust cam

Part No

0742635-4

Either manufacturer’s Name or Trademark,

Marking is on Bearing side

Inserted pictures shows marking example 47

Certified Marking

Marking Instruction

Required Marking

Fuel nozzle

Part No

0742639-1

Manufacturer’s Name or trademark,

Marking Location

Required Marking

Scavenge air cooler

Manufacturer’s Name,

Contract number,

Year of manufacture,

Water side and Air side figures for: Op

Test Exc

Temperature (oC) and Content (L)

Marking is on Name Plate

Required Marking

Turbocharger

Manufacturer’s Name,

Serial number(s),

Manufacturing date,

Specification,

Marking is on Name Plate T/C manufacturer is responsible for marking 4 internal components and issues a specific IMO certificate for the T/C

Required Marking

Auxiliary blower

Manufacturer’s Name,

Capacity,

Pressure,

Density,

Serial number(s),

Date of build and Electrical Source

Marking is on Name Plate

Governor

Manufacturer/ Installer is responsible for marking

Licensee’s own numbering Some licensees have introduced their own IMO ID numbering system

However,

the MAN B&W Diesel ID number is always required along with the licensee number in the TF

The ME engine has certain different components,

but the On board survey exactly follows same procedures as for the MC engine

Emissions from non-IMO engines or for other purposes Engines that do not fall within the IMO regulation (i

‘old engines’ built before 1 January 2000) are not required,

to document the emission characteristics

Incentives from individual states or customers may urge Owners to obtain actual emission values

It is possible,

to measure emissions on board for different Flag State/customer purposes

The specific requirements (components and accuracies) should be stated clearly

The ship Owners will have an obligation to ensure safe access for personnel and provide the equipment and exhaust sampling gear necessary for taking the measurements

On board IMO engine certification should only be carried out if absolutely necessary

In order to obtain an EIAPP certificate after installation on board,

the engine must be certified either as an Individual engine or an engine Group

In principle,

most of the survey procedures made for the Individual and the Parent engine application will be the same

The measurement procedures must follow normal Testbed procedures (for measurements and load cycle) and without any tolerance allowances

For IMO-compliant engines,

all gaseous emission must be stated (at the four load points in the E2/E3 cycle) in Chapter 4 of the TF (for the common MAN B&W Diesel TF)

Description of Documents

Pre-certificate The interim Engine International Air Pollution Prevention Certificate (EIAPP) is the legal document that approves the engine on the Testbed in accordance with the NOx Code and Regulation 13 of Annex VI

This preliminary or interim certificate (‘statement of compliance’) will only be issued until the enforcement date of 19 May 2005,

and will have to be exchanged with a final EIAPP certificate since Annex VI has been ratified

All of the original documents must be available on board at all times

TF An approved document that specifies the actual engine’s performance data,

the engine Group (a number of engines defined by the engine with the highest NOx emission – the Parent engine),

the emission characteristics of the Group,

and how to survey the engine on board for NOx compliance

MAN B&W Diesel has introduced a Unified TF as the standard common TF set-up for all MAN B&W Diesel Two-stroke engines

This was done in order to simplify the IMO Annex VI for Owners and to ensure similar TFs for all MAN B&W Diesel engines,

independent of the various licensees

To ensure compliance with the MAN B&W Diesel standard,

an example of a Unified TF can be obtained by contacting Department 2110

On-board Survey A survey of the engine,

to verify continuous compliance with the NOx emission limits of IMO Annex VI

Different survey methods are specified in the IMO NOx Technical Code – dependent on the purpose of the survey (pre-certification survey on Testbed,

periodical or intermediate surveys on board)

Engine parameter check method MAN B&W Diesel has defined an Engine Parameter Check Method as a combination of a performance parameter check and a component survey (see Service Letter No

SL03-428)

The On board survey is described in detail in TF,

Chapter 3,

This presents an overview of the different mandatory survey procedures

Parameter survey A manufacturer defined survey procedure

MAN B&W Diesel has defined four performance parameters for the On board survey for verification of engine compliance with the IMO NOx regulation: • • • •

maximum pressure maximum compression pressure scavenge air temperature turbocharger backpressure

To verify compliance,

these parameters (adjusted to ISO ambient conditions) must stay within the tolerances specified in TF,

Table 1

The survey follows standard MAN B&W Diesel procedures for engine performance checks (see TF,

Appendix B)

However,

all sensors and gauges used in the survey code must be reliable and calibrated in accordance with the manufacturers specifications (and the IMO NOx Technical Code requirements)

Survey code A dedicated code for the actual engine Group that facilitates easy On board surveys

In connection with the On board survey (see TF,

Chapter 3 and Appendix B),

MAN B&W Diesel has introduced a small Microsoft® Excel® code that,

or points to necessary adjustments of the engine setting/performance values

When the engine is surveyed (Testbed or On board),

the setting values are measured in accordance with the procedures in the instruction book,

and documented through the survey code,

which is printed out to the Record Book

The performance parameter survey automatically approves the setting values

For MAN B&W two-stroke engines,

these are for guidance only (i

for use in cases where the performance data can not be obtained – e

When using the MAN B&W Diesel-defined on board parameter survey method for large two-stroke engines,

the setting values are for guidance only

For other survey methods,

either TF-defined tolerances (based on additional measurements for the individual settings) or amendments are necessary

The actual readings are registered in the survey code for future reference

Record Book of engine parameters An Owner-established ‘log book’ to document any changes (including recorded On board surveys) to IMO components or engine settings that may influence NOx emissions

With a few modifications,

the standard on board ‘log book’ can be used as the Record Book

Together with the TF,

MAN B&W has introduced a survey code that lists the necessary documentation from the On board survey to be included the Record Book

Parameters in the Documents

IMO ID-number A manufacturer specified unique number for an engine component that may have an influence on the engine NOx emission characteristics

MAN B&W Diesel has defined the ‘Part Number’ as the IMO ID-number for the component

Many of the defined NOx components (MAN B&W Diesel has defined 12 standard engine components as IMO NOx components) are already stamped with the Part Number

However,

only the main Part Number is used – not including the revision digit (see encircled number in TF,

Appendix A)

Some licensees have introduced their own IMO ID-number system

However,

the MAN B&W Diesel ID-number is always required along with the licensee number in the TF

Components with any one of the numbers defined in TF,

Table 1

Only the components marked with an IMO ID-number and specified in TF,

Table 1

New components or modified spare parts to replace the existing component (i

components with a different IMO ID-number) must be amended to the TF

MAN B&W Diesel are responsible for ensuring that original spare parts can be used on board

Always make sure that MAN B&W Diesel ID-numbers are added to the licensee’s TF in order to obtain the flexibility for purchasing and updating parts

Performance tolerances The tolerances defined in TF,

Table 1

Following extensive testing,

MAN B&W Diesel has established the NOx sensitivity of different performance parameters (maximum pressure,

scavenge air temperature and turbocharger backpressure)

This knowledge has been utilised to establish the defined allowed maximum IMO tolerances

These tolerances must be met always,

independent of (or in addition to) the specified service tolerances in the instruction books for the engine

Performance reference values The ‘ideal’ Parent engine performance reference values are defined in TF,

Table 1

When the Parent engine is run on the Testbed,

not precisely adjusted engine setting values may lead to slightly ‘off-performance’ values

This is normal,

therefore to define the engine Group in the best possible way,

a set of slightly different values – the performance reference values – has been defined

The engine NOx emission is now corrected to reflect this condition,

just as the NOx emission is corrected to ISO ambient conditions

Engine setting values Mechanical or electrical adjustment features of the engine providing certain engine performance characteristics

When the engine is surveyed (Testbed or On board),

these values are measured (following the procedures in the instruction books) and documented through the survey code (and printed out to the Record Book)

With a few modifications,

the standard ‘log book’ on board can be used as the Record Book

The performance parameter survey automatically approves the engine setting values,

which for MAN B&W two-stroke engines are for guidance only (i

for use in cases where the performance data cannot be obtained,

Adjustment of the ME engine setting values is done on the Engine Control System panel and verified by means of ‘checksum’ values

Two checksums are defined for emissions,

an ‘IMO Design checksum’ and an ‘IMO Chief checksum’

The IMO Chief checksum is verified (and approved) through the On board parameter survey,

whereas the ‘IMO Design checksum’ is a manufacturer responsibility,

which might require an amendment to be in compliance

This amendment usually consists of one page referring to engine Group,

and the authorised company approval number introducing a new IMO ID-number on a component

Changing of setting values Setting values can be changed,

depending on the survey method as defined in the TF

The actual readings are registered in the survey code for future reference

When the engine is surveyed (Testbed or On board),

these values are measured (following the procedures in the instruction books and documented through the survey code (and printed out to the Record Book)

The performance parameter survey automatically approves the setting values,

which for MAN B&W two-stroke engines are for guidance only

Influence on engines in operation Modifications to engine are allowed within IMO defined constraints

IMO Annex VI uses specific definitions related to engine modifications (spare parts,

major conversion and substantial modification)

Spare parts Always use spare parts from authorised MAN B&W Diesel spare part suppliers and drawings

Only the components marked with an IMO ID-number and specified in TF,

Table 1

New components or modified spare parts to replace the existing components (e

components with a different IMO ID-number) must be amended in the TF

The amendment usually consists of one page referring to an engine Group,

and the authorising company (Classification Society) approval number introducing a new IMO ID-number on a component

MAN B&W Diesel is responsible for ensuring that original spare parts can be used on board

New IMO NOx components will be filed by MAN B&W Diesel with the class societies when engine Groups (using the unified TF set-up) are filed to MAN B&W Diesel

This will require that our licensees report back to MAN B&W Diesel regarding introduced engine Groups

Always make sure that MAN B&W Diesel ID-numbers are added to the licensee TF,

in order to obtain flexibility when buying and updating parts

Major conversions As defined in IMO Annex VI,

Regulation 13: • When the engine is replaced with a new engine (built after 1 January 2000) • When the engine undergoes a substantial modification • When the MCR rating is increased by more than 10%

In cases of a major conversion of an ‘old’ engine (an engine built before 1 January 2000),

this engine must now fully comply with Annex VI,

Regulation 13

Engines that already comply with the Regulation 13 might,

an amendment will be sufficient

Engines that are derated (e

by more than 10%) might have a change in their emission characteristics (possibly,

also be considered as a major conversion

Substantial modifications For ‘IMO compliant’ engines where the modification will increase the NOx emission level to exceed the IMO limit set out in Regulation 13 of Annex VI,

and for ‘old’ engines where the modification increases their existing NOx emission level beyond the tolerances allowed for a simplified measurement method

Due to the difficult conditions for taking measurements on board,

certain measurement tolerances are allowed in connection with this method (see NOx Technical Code §6

For compliant engines,

if the Parent engine’s maximum NOx tolerance is exceeded,

a new Parent engine must be introduced

For ‘old’ engines,

it would require major efforts (if possible at all) to establish a TF and certify the engine on board

Fortunately,

most modifications (introduction of new techniques and technologies) will reduce emissions and,

not result in a requirement for the engine to comply with the IMO regulation

Amendments An amendment is the formal instrument to introduce changes to the original IMO components and settings defined in the engine’s TF

The amendment usually consists of one page referring to the engine Group,

and the Flag State representative approval number introducing a new IMO ID-number

For new Members to an existing engine Group to which amendments have been issued,

the amended component will be introduced directly into the Member TF

Reconditioning of engine parts Engine parts can be reconditioned as usual,

provided the repair shop is authorised and uses original MAN B&W Diesel drawings

The components must be machined to the same dimensions as specified for original parts

If the component ID-number is not readable,

the number must be re-established in agreement with the standard MAN B&W Diesel marking procedures

Reconditioning is usually performed only on major large components,

where the dimensions do not have the stronger influence on the emission characteristics

Maintenance on an IMO engine Maintenance should be performed in accordance with the engine’s instruction books,

: • Exchange of spare part as necessary • Performance checks as specified

However,

attention needs to be kept on the tolerances specified in TF,

Table 1

It should be emphasised that proper maintenance is required,

and that it is a part of keeping engine emissions within the specified limits

Unless the engine is maintained in accordance with the engine instruction books,

and is compliant with the TF specifications,

the manufacturer bears no responsibility for the engine with regard to IMO compliance

Simplified measurement method Emission measurements for on board confirmation tests only and periodical and intermediate surveys,

see IMO NOx Technical Code §6

The second method for On board surveys as defined in the NOx Technical Code and also the method for verifying the emission status for non-compliant ‘old’ engines with back-to-back measurements

Following the procedures above,

to measure emissions on board for different Flag State/customer purposes

The specific requirements (components and accuracies) should be stated clearly

The ship Owners will have an obligation to ensure safe access for personnel,

equipment and the exhaust sampling equipment necessary for the measurements

Only if absolutely necessary should an engine be IMO certified on board

In order to obtain an EIAPP certificate on board,

the engine must be certified as either an Individual engine or an engine Group,

the measurement procedures must follow ‘normal’ Testbed procedures (for measurements and load cycle) and without any allowances

For IMO-compliant engines,

all gaseous emissions are stated (at the four load points in the E2/E3 cycle) in the TF,

Chapter 4

Continuous On-board monitoring NOx emission measurements (and monitoring) applied for On board periodical and intermediate surveys (see IMO NOx Technical Code §2

The third method for On board surveys defined in the NOx Technical Code (pre-certification survey on Testbed,

or periodical and intermediate surveys on board)

Measurements of similar quality to the simplified measurement method are required

A sub-committee under the Marine Environment Protection Committee (MEPC) has recently drafted the ‘Guidelines for On board NOx Verification Procedure – Direct Measurement and Monitoring Method,’ DE46/WP

which were adopted as draft guidelines

It should be emphasised that continuous on board monitoring does not imply continuous measuring during the entire operation of the engine,

but only during defined sequences

Is continuous On-board emission monitoring needed

! As long as surveys are performed as defined in the Unified TF are in compliance with IMO Annex VI,

there is no need for complicated emission measurements on board to verify compliance

In all cases and at all times,

the engine must always be maintained appropriately,

and performance data be recorded to ensure proper operation

The continuous on board monitoring method is an option which the Owner,

It will be difficult to establish the method without the cooperation of the manufacturer

Responsibilities

Licensee’s responsibilities • Marking of components in accordance with MAN B&W Diesel specifications • Performance testing of all engines to verify compliance with IMO Annex VI,

and emission testing of the Parent engines on the testbed • Preparing the TF and applying for an EIAPP certificate • Ensuring continuous compliance when engine is installed in the vessel (See note)

All final official Testbed measurements must be performed under survey conditions

Provided that the Owner maintains and operates the engine according to MAN B&W Diesel instructions,

the licensee must guarantee an IMO compliant engine throughout the engine warranty period (the US EPA Regulation operates with a ‘useful life’ warranty,

where the useful life is defined as three years or 10,000 hours of operation)

Yard’s responsibilities • Assist with or perform the initial engine survey on board,

depending on the agreement with the licensee • Apply for the vessel certificate (the IAPP certificate)

Now that the IMO Annex VI is ratified (enforced from 19 May 2005),

the common practice (and an IMO requirement) will be to perform the initial On-board Survey in connection with the vessel’s Sea Trial,

where the authorised surveyor is already on board

This has not been the case so far,

except in certain special cases to verify the correct adjustment of the main engine

Owner’s responsibility • Decide on the unified TF issue • Maintain the engine in accordance with the instruction books and IMO requirements (not limited to IMO components and performance surveys) • Keep and update the on-board engine Record Book • Calibrate necessary sensors/gauges used in the surveys • Survey the engines on board and apply for future certificates

In case of emission measurements being taken on board,

the owner takes on additional responsibility

Other Can emissions on ‘old’ engines be reduced

Low-NOx nozzles and new Slide Fuel Valves designed to improve HC and PM emissions are available for many MC engines today

However,

the emission reduction potential,

should be evaluated case by case

The benefit for the environment is unquestionable,

but the Owner will also benefit from improved cylinder conditions

Whereas the benefit from meeting IMO or Flag State emission regulations may require difficult measurements taken on board

ME engines The MAN B&W ME engine range has certain different components than the 12 standard engine MAN B&W Diesel-defined IMO NOx components (a listing of the components is given in TF,

Table 1

but the on board survey follows exactly same procedures as for the MC engine

Adjustment of the engine setting values is effected on the Engine Control System panel and is verified by means of checksum values

Two checksums are defined for emissions,

an ‘IMO Design checksum’ and an ‘IMO Chief checksum’

The ‘IMO Chief checksum’ is verified (and approved) through the on board parameter survey,

whereas the ‘IMO Design checksum’ is a manufacturer responsibility,

which may require an amendment to be in compliance

Future regulations Today,

all new engines comply with the IMO emission regulation from the Testbed (EIAPP certification),

they lack the initial on board survey (the IAPP certification)

Now Annex VI has been ratified,

all vessels must be surveyed to obtain the final IAPP certificate

New engines will be surveyed during the Sea Trial,

whereas engines introduced since 1st January 2000 shall be surveyed no later than the the first dry docking,

but in no case later than 3 years after entry into force

The discussion on new emission limits will start again within the IMO

First of all,

with regard to additional NOx reductions,

but also other emission components

The issue of the existing ‘old’ engines could surface again

Additional Local Areas for further SOx control could be introduced

The work involved in issuing the final IAPP certificate is extensive,

first for the Owners to ensure compliance (following the onboard TF procedures) and,

the Authorised Companies to participate in the surveys and issue the certificates

Owners might want to introduce ‘new type’ spare parts (e

the Slide Fuel Valve) to improve engine conditions

Accordingly,

MAN B&W Diesel will prepare amendments for such cases

Further requirements for additional emission reductions,

as used on some stationary power plants,

but will unavoidably lead to increased first cost or/and operational costs

For many years,

MAN B&W Diesel has been working on different aspects of emission reductions (see MAN B&W Diesel paper,

333-97-04

‘How to deal with Emission Control’)

The next level of emission limits have already been proposed by the leading environmentally-active countries and associations (the US,

Japan and EU)

A further NOx reduction of some 25% to 30% and,

include other emission components like CO,

HC and soot

The new ME engine concept offers a high level of flexibility to optimise the engine for different emission regulations in Local Areas without penalising the fuel consumption or other emission components elsewhere

Assistance from MAN B&W Diesel Department 2110 (Classifications) can inform you about the procedures for the TF

Department 4100 (Diesel Service) offers the following services: • Review and assistance to Owners to ensure on board compliance (engines with ‘IMO certificates’ before and after the Annex enters into force) • Guiding emission measurements (for other purposes than IMO certification/amendments)

Departments 4220/30/40 ensure delivery of genuine spare parts complying with the IMO regulations

Department 2431 (Basic Research and Emissions) can,

perform IMO-compliant emission measurements on board

Overview of Survey Routines

Survey Start

Survey Type Testbed: Inspection of Pre-Technical File (EIAPP) 2

Member Engine

Parent Engine

Performance Check: a) measure performance b) verify performance

Engine Type

Performance Check: a) measure performance b) measure NOx

NOx components Check c) check fuel nozzle and ECS version d) other NOx components e) verify settings

NOx components Check: c) check fuel nozzle and ECS version d) other NOx components e) verify settings

Print out survey code tables (with EIAPP application) Adjust

Performance and Component approval

Adjust No

Yes Sign Documents

Performance and Component approval

Sea Trial

On-board Survey Inspection of: Technical File and Record Book

Inspection of: Technical File (IAPP) Adjustment or Component Changes No

NOx components Check c) check fuel nozzle and ECS version d) other NOx components (as considered necessary e) verify settings (as considered necessary)

NOx components Check c) check fuel nozzle and ECS version d) other NOx components (as considered necessary) e) verify settings (as considered necessary) Print out survey tables

Performance Check: a) measure performance b) verify performance (VIT or non-VIT)

Print out survey tables No Yes

Survey Finish

Performance and Component approval

Sign Documents and add to Record Book