Calculation of reference lines
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Statutory Documents - IMO Publications and Documents - Resolutions - Marine Environment Protection Committee - Resolution MEPC.231(65) – 2013 Guidelines for Calculation of Reference Lines for Use with the Energy Efficiency Design Index (EEDI) - 2013 Guidelines for Calculation of Reference Lines for Use with the Energy Efficiency Design Index(EEDI) - Calculation of reference lines

Calculation of reference lines

  13 To calculate the reference line, an estimated index value for each ship contained in the set of ships per ship type is calculated using the following assumptions:

  • .1 the carbon emission factor is constant for all engines, i.e. CF,ME = CF,AE = CF = 3.1144 g CO2/g fuel;

  • .2 the specific fuel consumption for all ship types is constant for all main engines, i.e. SFCME = 190 g/kWh;

  • .3 PME(i) is 75% of the total installed main power (MCRME(i) );

  • .4 the specific fuel consumption for all ship types is constant for all auxiliary engines, i.e. SFCAE = 215 g/kWh;

  • .5 PAE is the auxiliary power and is calculated according to paragraphs 2.5.6.1 and 2.5.6.2 of the annex to MEPC.212(63);

  • .6 for ro-ro passenger ships, PAE is calculated as follows:

  • .7 no correction factors are used except for f jRoRo and f cRoPax; and

  • .8 innovative mechanical energy efficiency technology, shaft motors and other innovative energy efficient technologies are all excluded from the reference line calculation, i.e. PAEeff = 0, PPTI = 0, Peff = 0.

  14 The equation for calculating the estimated index value for each ship (excluding containerships and ro-ro cargo ships (vehicle carrier) – see paragraph 15) is as follows:

  15 For containerships, 70 per cent of the deadweight (70% DWT) is used as capacity for calculating the estimated index value for each containership as follows:

  16 For ro-ro cargo ship (vehicle carrier), the following equation is used:

  • Where:

  17 For ro-ro cargo ships the estimated index value for each individual ship is calculated as follows:

  18 For ro-ro passenger ships the estimated index value for each individual ship is calculated as follows:

  19 For LNG carriers, the equation set out in appendix 2 is used.

Parent topic: 2013 Guidelines for Calculation of Reference Lines for Use with the Energy Efficiency Design Index(EEDI)
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