MEPC RESOLUTION MEPC.230(65)
Adopted
on 17 May 2013
2013 GUIDELINES AS REQUIRED
BY REGULATION 13.2.2 OF MARPOL ANNEX VI IN RESPECT OF NON-IDENTICAL REPLACEMENT
ENGINES NOT REQUIRED TO MEET THE TIER III LIMIT
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,
RECALLING ALSO that, at its fifty-eighth session, the Committee
adopted, by resolution MEPC.176(58),
a revised MARPOL Annex VI (hereinafter referred to as "MARPOL Annex
VI") which significantly strengthens the emission limits for nitrogen
oxides (NOx) in light of technological improvements and
implementation experience,
NOTING that regulation 13.2.2 of MARPOL Annex VI specifies which
NOx emission standard shall be applied when a marine diesel engine
is replaced with a non-identical marine diesel engine,
RECOGNIZING the need to develop guidelines to set forth the
criteria of when it is not possible for a replacement engine to meet the
standards in regulation 13.5.1.1 (Tier III),
HAVING CONSIDERED, at its sixty-fifth session, the guidelines as
required by regulation 13.2.2 in respect of non-identical replacement engines
not required to meet the Tier III limit, proposed by the Sub-Committee on Bulk
Liquids and Gases at its seventeenth session,
1. ADOPTS
the Guidelines as required by regulation 13.2.2 in respect of non-identical
replacement engines not required to meet the Tier III limit, as set out at
annex to the present resolution;
2. INVITES
Administrations to take the annexed Guidelines into account when certifying a
marine diesel engine which is replaced with a non-identical marine diesel
engine;
3. REQUESTS
the Parties to MARPOL Annex VI and other Member Governments to bring the
annexed Guidelines to the attention of shipowners, ship operators,
shipbuilders, marine diesel engine manufacturers, and any other interested
groups; and
4. AGREES
to keep these Guidelines under review in light of the experience gained.
GUIDELINES AS REQUIRED BY REGULATION 13.2.2 IN RESPECT OF NON-IDENTICAL
REPLACEMENT ENGINES NOT REQUIRED TO MEET THE TIER III LIMIT
1 When it becomes
necessary to replace an engine to which regulation 13 of MARPOL Annex VI
applies in principle (power output of more than 130 kW) the non-identical
replacement engine shall comply with the standards set forth in paragraph 5.1.1
of the respective regulation (Tier III) when operating in an area designated
under regulation 13.6 of MARPOL Annex VI if the replacement takes place on or
after 1 January 2016 unless:
.1 a
replacement engine of similar rating complying with Tier III is not
commercially available; or
.2
the replacement engine, in order to be brought into Tier III compliance, needs
to be equipped with a NOx reducing device which due to:
.1
size cannot be installed in the limited space available on board; or
.2
extensive heat release could have adverse impact on the ships structure,
sheeting, and/or equipment whilst additional ventilation and/or insulation of
the engine-room/compartment will not be possible.
2 In making the
determination that a Tier III engine is not a feasible replacement engine for a
ship, it should be necessary to evaluate not just engine dimensions and weight
but may also include other pertinent ship characteristics. These pertinent
characteristics could include:
.1
downstream ship components such as drive shafts, reduction gears, cooling
systems, exhaust and ventilation systems, and propeller shafts;
.2
electrical systems for diesel generators (indirect drive engines); and
.3
such other ancillary systems and ship equipment that would affect the choice of
an engine.
3 Restrictions should
also be considered concerning engine adjustment/matching needed to meet
boundary conditions and performance data necessary for SCR operation at all
relevant mode points.
4 If the replacement
engine is part of a multi-engine (twin-engine) arrangement and it is replacing
an engine that is not a Tier III compliant engine due to it having been
installed prior to the Tier III implementation date, a need to match a
replacement engine within a multi-engine arrangement should be part of the
criteria to be considered. In such cases, if it were decided to exempt a
replacement engine in multi-engine arrangements it must be clear that is where
engines are installed as matched pairs (or more) as propulsion engines and that
matching is necessary to ensure comparable manoeuvring/drive response rather
than where multiple engines are installed such as in the case of generators.
5 A replacement engine
that meets the Tier III limit should be installed provided it does not incur an
increase in the ship's electrical demand beyond the installed capacity.
6 In no case should
modification to the ship's structure be allowed which weakens its structural
stability below the acceptable level.