Clasification Society Rulefinder 2016 - Version 9.25
Statutory Documents - IMO Publications and Documents - Resolutions - Marine Environment Protection Committee - Resolution MEPC.198(62) – 2011 Guidelines Addressing Additional Aspects to the Nox Technical Code 2008 with regard to Particular Requirements related to Marine Diesel Engines fitted with Selective Catalytic Reduction (SCR) Systems – (Adopted on 15 July 2011) - Annex – 2011 Guidelines Addressing Additional Aspects to the Nox Technical Code 2008 with regard to Particular Requirements related to Marine Diesel Engines fitted with Selective Catalytic Reduction (SCR) Systems - 6 Test Procedures for Scheme B - 6.1 General

6.1 General

  6.1.1 A test for an engine system fitted with SCR in Scheme B is to ensure that the system complies with the applicable NOx emission limits in MARPOL Annex VI, as required. The test procedures in Scheme B are as follows:

  • .1 an engine is tested to obtain the NOx emission value (g/kWh) in accordance with paragraph 6.2.1 of these guidelines;

  • .2 the SCR NOx reduction rate may be calculated by modelling tools, taking into account geometrical reference conditions, chemical NOx conversion models as well as other parameters to be considered;

  • .3 an SCR chamber, not necessarily to full scale, is to be tested in accordance with section 6.3 of these guidelines in order to generate data for the calculation model as that used in paragraph 6.1.1.2 of these guidelines;

  • .4 the NOx emission from the engine system fitted with SCR, which is calculated in accordance with section 6.4 of these guidelines using the NOx emission value from the engine and the NOx reduction rate of SCR chamber. At this point the Technical File will be completed and this NOx emission value will be entered into the supplement of the EIAPP certificate; and

  • .5 the NOx emission performance of the engine combined with the SCR is verified by a confirmation test in accordance with the procedure in paragraph 7.5 of these guidelines.

Parent topic: 6 Test Procedures for Scheme B
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