RESOLUTION MEPC.259(68)/Corr.2
(adopted on 15 May 2015)
2015 GUIDELINES FOR EXHAUST GAS CLEANING SYSTEMS
THE MARINE ENVIRONMENT PROTECTION COMMITTEE,
RECALLING Article 38(a) of the Convention on the
International Maritime Organization concerning the functions of the Marine
Environment Protection Committee (the Committee) conferred upon it by
international conventions for the prevention and control of marine pollution
from ships,
RECALLING ALSO that, at its fifty-eighth session, the
Committee adopted, by resolution MEPC.176(58), a revised
MARPOL Annex VI which significantly strengthens the emission limits for sulphur
oxides (SOX),
RECALLING FURTHER that, at its fifty-ninth session,
the Committee adopted, by resolution MEPC.184(59), the 2009 Guidelines for exhaust gas cleaning
systems (hereinafter referred to as "2009 EGCS Guidelines"),
NOTING that the revised MARPOL Annex VI entered into
force on 1 July 2010,
NOTING ALSO that regulation 4 of MARPOL Annex VI
allows the use of an alternative compliance method at least as effective in
terms of emission reductions as that required by MARPOL Annex VI, including any
of the standards set forth in regulation 14, taking into account guidelines
developed by the Organization,
RECOGNIZING the need to update the 2009 EGCS
Guidelines accordingly,
HAVING CONSIDERED, at its sixty-eighth session, draft
amendments to the 2009 EGCS Guidelines, prepared by the Sub-Committee on
Pollution Prevention and Response, at its second session,
1 ADOPTS
the 2015 Guidelines for exhaust gas
cleaning systems, as set out in the annex to the present resolution;
2 INVITES Administrations to take these Guidelines into
account when allowing the use of an exhaust gas cleaning system in accordance
with regulation 4 of MARPOL Annex VI;
3 REQUESTS Parties to MARPOL Annex VI and other Member
Governments to bring these Guidelines to the attention of shipowners, ship
operators, shipbuilders, marine diesel engine manufacturers and any other
interested groups;
4 INVITES Administrations to provide for collection of data
as described in appendix 3 of these Guidelines;
5 AGREES to keep these Guidelines under review in the light
of experience gained with their application;
6 SUPERSEDES the 2009 EGCS Guidelines adopted by resolution MEPC.184(59).
ANNEX
2015 GUIDELINES FOR EXHAUST GAS CLEANING SYSTEMS
1 INTRODUCTION
1.1 Regulation 14 of Annex VI requires ships to use fuel oil with
a sulphur content not exceeding that stipulated in regulations 14.1 or 14.4.
Regulation 4 allows, with the approval of the Administration, the use of an
alternative compliance method at least as effective in terms of emission
reductions as that required by the Annex, including the standards set forth in
regulation 14. The Administration of a Party should take into account any
relevant guidelines developed by the Organization pertaining to alternatives
provided for in regulation 4.
1.2 Similar to a NOX emission reduction system, an
exhaust gas cleaning (EGC) unit may be approved subject to periodic parameter
and emission checks or the system may be equipped with a continuous emission
monitoring system. These guidelines have been developed with the intention of
being objective and performance oriented. Furthermore, use of the SO2(ppm)/CO2(%)
ratio method will simplify the monitoring of SOX emission and
facilitate approval of an EGC unit. See appendix 2 for the rationale explaining
the use of SO2(ppm)/CO2(%) as the basis for system
monitoring.
1.3 Compliance should be demonstrated on the basis of the SO2(ppm)/CO2(%
v/v) ratio values.
Table 1: Fuel oil sulphur limits recorded in
regulations 14.1 and 14.4 and corresponding emissions values
|
Fuel oil sulphur content (% m/m) |
Ratio emission SO2(ppm)/CO2(%
v/v) |
|
4.50 |
195.0 |
|
3.50 |
151.7 |
|
1.50 |
65.0 |
|
1.00 |
43.3 |
|
0.50 |
21.7 |
|
0.10 |
4.3 |
Note: The use of the ratio
emissions limits is only applicable when using petroleum based distillate or
residual fuel oils. See appendix 2 for application of the ratio method.
1.4 These guidelines are recommendatory in
nature, however, Administrations are invited to base the implementation of the
relevant requirements of regulation 4 of MARPOL Annex VI on them.
2 GENERAL
2.1 Purpose
2.1.1 The purpose of these guidelines is to specify the requirements
for the testing, survey certification and verification of EGC systems under
regulation 4 of MARPOL Annex VI to ensure that they provide effective equivalence
to the requirements of regulations 14.1 and 14.4 of MARPOL Annex VI.
2.1.2 These guidelines permit two schemes: Scheme A (unit certification
with parameter and emission checks and Scheme B (continuous emission monitoring
with parameter checks).
2.1.3 For ships which are to use an exhaust gas cleaning system in part
or in total in order to comply with regulations 14.1 and/or 14.4 of MARPOL
Annex VI, there should be an approved SOX Emissions Compliance Plan
(SECP).
2.2 Application
2.2.1 These guidelines apply to any EGC unit as fitted to fuel oil
combustion machinery, excluding shipboard incinerators, installed on board a
ship.
2.3 Definitions and
required documents
|
Fuel oil combustion unit |
Any
engine, boiler, gas turbine, or other fuel oil fired equipment, excluding
shipboard incinerators |
|
EGC |
Exhaust gas cleaning |
|
SOX |
Sulphur oxides |
|
SO2 |
Sulphur dioxide |
|
CO2 |
Carbon dioxide |
|
UTC |
Universal Time Co-ordinated |
|
Certified Value |
The SO2/CO2
ratio specified by the manufacturer that the EGC unit is certified
as meeting when operating on a continuous basis on the manufacturers
specified maximum fuel sulphur content |
|
In situ |
Sampling directly within an exhaust gas stream |
|
MCR |
Maximum Continuous Rating |
|
Load range |
Maximum rated
power of diesel engine or maximum steaming rate of the boiler |
|
SECP |
SOX Emissions Compliance Plan |
|
SECC |
SOX Emissions Compliance Certificate |
|
ETM-A |
EGC system – Technical Manual for Scheme A |
|
ETM-B |
EGC system – Technical Manual for Scheme B |
|
OMM |
Onboard Monitoring Manual |
|
EGC Record Book |
A record
of the EGC unit in-service operating parameters, component adjustments,
maintenance and service records as appropriate |
|
Document |
Scheme A |
Scheme B |
|
SECP |
X |
X |
|
SECC |
X |
|
|
ETM Scheme A |
X |
|
|
ETM Scheme B |
|
X |
|
OMM |
X |
X |
|
EGC Record Book or Electronic Logging System |
X |
X |
3 SAFETY NOTE
Due attention is to be given to the safety
implications related to the handling and proximity of exhaust gases, the
measurement equipment and the storage and use of pressurized containers of pure
and calibration gases. Sampling positions and permanent access platforms should
be such that this monitoring may be performed safely. In locating discharge
outlet of washwater used in the EGC unit, due consideration should be given to
the location of the ship's seawater inlet. In all operating conditions the pH
should be maintained at a level that avoids damage to the vessel’s anti-fouling
system, the propeller, rudder and other components that may be vulnerable to
acidic discharges, potentially causing accelerated corrosion of critical metal
components.
4 SCHEME A – EGC
SYSTEM APPROVAL, SURVEY AND CERTIFICATION USING PARAMETER AND EMISSION CHECKS
4.1 Approval of EGC systems
Options under Scheme A of
these guidelines provide for:
.1 unit approval;
.2 serially manufactured units; and
.3 production range approval.
4.1.2.1 An
EGC unit should be certified as capable of meeting the limit value, (the
Certified Value), specified by the manufacturer (e.g. the emission level the
unit is capable of achieving on a continuous basis) with fuel oils of the
manufacturer’s specified maximum % m/m sulphur content and for the range of
operating parameters, as listed in paragraph 4.2.2.1.2, for which they are to
be approved. The Certified Value should at least be suitable for ship
operations under requirements given by MARPOL Annex VI regulations 14.1 and/or
14.4.
4.1.2.2 Where
testing is not to be undertaken with fuel oils of the manufacturer's specified
maximum % m/m sulphur content, the use of two test fuels with a lower % m/m
sulphur content is permitted. The two fuels selected should have a difference
in % m/m sulphur content sufficient to demonstrate the operational behaviour of
the EGC unit and to demonstrate that the Certified Value can be met if the EGC
unit were to be operated with a fuel of the manufacturer's specified maximum %
m/m sulphur content. In such cases a minimum of two tests, in accordance with
section 4.3 as appropriate, should be performed. These need not be sequential
and could be undertaken on two different, but identical, EGC units.
4.1.2.3 The
maximum and, if applicable, minimum exhaust gas mass flow rate of the unit
should be stated. The effect of variation of the other parameters defined in
paragraph 4.2.2.1.2 should be justified by the equipment manufacturer. The
effect of variations in these factors should be assessed by testing or
otherwise as appropriate. No variation in these factors, or combination of
variations in these factors, should be such that the emission value of the EGC
unit would be in excess of the Certified Value.
4.1.2.4 Data
obtained in accordance with this section should be submitted to the
Administration for approval together with the ETM-A.
In the case of nominally similar EGC units of the same
mass flow ratings as that certified under 4.1.2, and to avoid the testing of
each EGC unit, the equipment manufacturer may submit, for acceptance by the
Administration, a conformity of production arrangement. The certification of
each EGC unit under this arrangement should be subject to such surveys that the
Administration may consider necessary as to assure that each EGC unit has an emission
value of not more than the Certified Value when operated in accordance with the
parameters defined in paragraph 4.2.2.1.2.
4.1.4.1 In
the case of an EGC unit of the same design, but of different maximum exhaust gas
mass flow capacities, the Administration may accept, in lieu of tests on an EGC
unit of all capacities in accordance with section 4.1.2, tests of EGC systems
of three different capacities provided that the three tests are performed at
intervals including the highest, lowest and one intermediate capacity rating
within the range.
4.1.4.2 Where
there are significant differences in the design of EGC units of different
capacities, this procedure should not be applied unless it can be shown, to the
satisfaction of the Administration, that in practice those differences do not
materially alter the performance between the various EGC unit types.
4.1.4.3 For
EGC units of different capacities, the sensitivity to variations in the type of
combustion machinery to which they are fitted should be detailed together with
sensitivity to the variations in the parameters listed in paragraph 4.2.2.1.2.
This should be on the basis of testing, or other data as appropriate.
4.1.4.4 The
effect of changes of EGC unit capacity on washwater characteristics should be
detailed.
4.1.4.5 All
supporting data obtained in accordance with this section, together with the
ETM-A for each capacity unit, should be submitted to the Administration for
approval.
4.2 Survey and certification
4.2.1.1 In
order to meet the requirements of section 4.1 either prior to, or after
installation on board, each EGC unit should be certified as meeting the
Certified Value specified by the manufacturer (e.g. the emission level the unit
is capable of achieving on a continuous basis) under the operating conditions
and restrictions as given by the EGC Technical Manual (ETM-A) as approved by
the Administration.
4.2.1.2 Determination
of the Certified Value should be in accordance with the provisions of these
guidelines.
4.2.1.3 Each
EGC unit meeting the requirements of paragraph 4.2.1.1 should be issued with a
SECC by the Administration. The form of the SECC is given in appendix 1.
4.2.1.4 Application
for an SECC should be made by the EGC system manufacturer, shipowner or other
party.
4.2.1.5 Any
subsequent EGC units of the same design and rating as that certified under
paragraph 4.2.1.1 may be issued with an SECC by the Administration without the
need for testing in accordance with paragraph 4.2.1.1 subject to section 4.1.3
of these guidelines.
4.2.1.6 EGC
units of the same design, but with ratings different from that certified under
paragraph 4.2.1.1 may be accepted by the Administration subject to section
4.1.4 of these guidelines.
4.2.1.7 EGC
units which treat only part of the exhaust gas flow of the uptake in which they
are fitted should be subject to special consideration by the Administration to
ensure that under all defined operating conditions that the overall emission
value of the exhaust gas downstream of the system is no more than the Certified
Value.
4.2.2.1 Each
EGC unit should be supplied with an ETM-A provided by the manufacturer. This
ETM-A should, as a minimum, contain the following information:
.1 the identification of the unit (manufacturer,
model/type, serial number and other details as necessary) including a
description of the unit and any required ancillary systems;
.2 the operating limits, or range of operating
values, for which the unit is certified. These should, as a minimum, include:
.1 maximum and, if applicable,
minimum mass flow rate of exhaust gas;
.2 the power, type and other
relevant parameters of the fuel oil combustion unit for which the EGC unit is
to be fitted. In the cases of boilers, the maximum air/fuel ratio at 100% load
should also be given. In the cases of diesel engines whether the engine is of 2
or 4-stroke cycle;
.3 maximum and minimum washwater
flow rate, inlet pressures and minimum inlet water alkalinity (ISO 9963-1-2);
.4 exhaust gas inlet temperature
ranges and maximum and minimum exhaust gas outlet temperature with the EGC unit
in operation;
.5 exhaust gas differential
pressure range and the maximum exhaust gas inlet pressure with the fuel oil
combustion unit operating at MCR or 80% of power rating whichever is
appropriate;
.6 salinity levels or fresh
water elements necessary to provide adequate neutralizing agents; and
.7 other factors concerning the
design and operation of the EGC unit relevant to achieving a maximum emission
value no higher than the Certified Value;
.3 any requirements or restrictions applicable
to the EGC unit or associated equipment necessary to enable the unit to achieve
a maximum emission value no higher than the Certified Value;
.4 maintenance, service or adjustment
requirements in order that the EGC unit can continue to achieve a maximum
emission value no higher than the Certified Value. The maintenance, servicing
and adjustments should be recorded in the EGC Record Book;
.5 corrective actions in case of exceedances of
the applicable maximum allowable SO2/CO2 ratio, or wash water discharge
criteria;
.6 a verification procedure to be used at
surveys to ensure that its performance is maintained and that the unit is used
as required (see section 4.4);
.7 through range performance variation in
washwater characteristics;
.8 design requirements of the washwater system;
and
.9 the SECC.
4.2.2.2 The
ETM-A should be approved by the Administration.
4.2.2.3 The
ETM-A should be retained on board the ship onto which the EGC unit is fitted
and should be available for surveys as required.
4.2.2.4 Amendments
to the ETM-A which reflect EGC unit changes that affect performance with
respect to emissions to air and/or water should be approved by the
Administration. Where additions, deletions or amendments to the ETM-A are
separate to the ETM-A as initially approved, they should be retained with the
ETM-A and should be considered as part of it.