Report - DCE - Nationalt Center for Miljø og Energi

Ã
Further, the Marine Environment Protection Committee (MEPC) of IMO has
agreed amendments to MARPOL Annex VI in October 2008 in order to
strengthen the emission standards for NOx and the sulphur contents of
heavy fuel oil used by ship engines.
For NOx emission regulations, a three tiered approach is considered, which
comprises the following:
• Tier I: Diesel engines (> 130 kW) installed on a ship constructed on or after
1 January 2000 and prior to 1 January 2011.
• Tier II: Diesel engines (> 130 kW) installed on a ship constructed on or after
1 January 2011.
• Tier III 5 : Diesel engines (> 130 kW) installed on a ship constructed on or
after 1 January 2016.
As for the existing NOx emission limits, the new Tier I-III NOx legislation
values rely on the rated engine speeds. The emission limit equations are
shown in Table 3.36.
ÃÃÃÃÃÃÃÃÃÃÃÃÉÃÃÃÃ
Ã
à Ãà ÃÉÃ
ÃÃ ÃÃÃÃ
Ã
ÃÃÃÃÃ
ÃÃÃÃ
ÃÃ ÃÃÃÃ
Ã
ÃÃÃÃÃ
ÃÃÃÃ
ÃÃ ÃÃÃÃ
Ã
ÃÃÃÃÃ
ÃÃÃÃ
ÃÃÃ
ÃÃÃÃÃ
ÃÃÃ
ÃÃÃ
ÃÃÃÃÃ
ÃÃÃ
ÃÃÃ
ÃÃÃÃÃ
ÃÃÃ
The Tier I emission limits are identical with the existing emission limits from
MARPOL Annex VI.
Also agreed by IMO in October 2008, the NOx Tier I limits are to be applied
for existing engines with a power output higher than 5000 kW and a displacement
per cylinder at or above 90 litres, installed on a ship constructed
on or after 1 January 1990 but prior to 1 January 2000.
In relation to the sulphur content in heavy fuel and marine gas oil used by
ship engines, Table 3.37 shows the current legislation in force, and the
amendment of MARPOL Annex VI agreed by IMO in October 2008.
5 For ships operating in a designated Emission Control Area. Outside a designated
Emission Control Area, Tier II limits apply.