Annex - Amendments to the 2014 Guidelines on the Method of Calculation of the Attained Energy Efficiency Design Index (EEDI) For New Ships (Resolution MEPC.245(66), as Amended by Resolution MEPC.263(68))
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Annex - Amendments to the 2014 Guidelines on the Method of Calculation of the Attained Energy Efficiency Design Index (EEDI) For New Ships (Resolution MEPC.245(66), as Amended by Resolution MEPC.263(68))

1 The following text is added after 2.12.3 in the table of contents:
  • "2.12.4 fc bulk carriers designed to carry light cargoes; wood chip carriers"
" Paragraph .1 is replaced with the following:
  • .1 CF is a non-dimensional conversion factor between fuel consumption measured in g and CO2 emission also measured in g based on carbon content. The subscripts ME(i) and AE(i) refer to the main and auxiliary engine(s) respectively. CF corresponds to the fuel used when determining SFC listed in the applicable test report included in a Technical File as defined in paragraph 1.3.15 of NOX Technical Code ("test report included in a NOX technical file" hereafter). The value of CF is as follows:
Type of fuel Reference Lower calorific value (kJ/kg) Carbon content CF (t-CO2/t- Fuel)
1 Diesel/Gas Oil ISO 8217 Grades

DMX through DMB

 42,700 0.8744 3.206
2 Light Fuel Oil (LFO) ISO 8217 Grades

RMA through RMD

 41,200 0.8594 3.151
3 Heavy Fuel Oil (HFO) ISO 8217 Grades

RME through RMK

 40,200 0.8493 3.114
4 Liquefied Petroleum Gas (LPG) Propane 46,300 0.8182 3.000
Butane 45,700 0.8264 3.030
5 Liquefied Natural Gas (LNG) 48,000 0.7500 2.750
6 Methanol 19,900 0.3750 1.375
7 Ethanol 26,800 0.5217 1.913
    • In case of a ship equipped with a dual-fuel main or auxiliary engine, the CF-factor for gas fuel and the CF-factor for fuel oil should apply and be multiplied with the specific fuel oil consumption of each fuel at the relevant EEDI load point. Meanwhile, gas fuel should be identified whether it is regarded as the "primary fuel" in accordance with the formula below:

      where,

      fDFgas is the fuel availability ratio of gas fuel corrected for the power ratio of gas engines to total engines, fDFgas should not be greater than 1;

      Vgas is the total net gas fuel capacity on board in m3. If other arrangements, like exchangeable (specialized) LNG tank-containers and/or arrangements allowing frequent gas refuelling are used, the capacity of the whole LNG fuelling system should be used for Vgas. The boil-off rate (BOR) of gas cargo tanks can be calculated and included to Vgas if it is connected to the fuel gas supply system (FGSS);

      Vliquid is the total net liquid fuel capacity on board in m3 of liquid fuel tanks permanently connected to the ship's fuel system. If one fuel tank is disconnected by permanent sealing valves, Vliquid of the fuel tank can be ignored;

      ρgas is the density of gas fuel in kg/m3;

      ρliquid is the density of each liquid fuel in kg/m3;

      LCVgas is the low calorific value of gas fuel in kJ/kg;

      LCVliquid is the low calorific value of liquid fuel in kJ/kg;

      Kgas is the filling rate for gas fuel tanks;

      Kliquid is the filling rate for liquid fuel tanks;

      Ptotal is the total installed engine power, PME and PAE in kW;

      Pgasfuel is the dual fuel engine installed power, PME and PAE in kW;

      .1 If the total gas fuel capacity is at least 50% of the fuel capacity dedicated to the dual fuel engines , namely fDFgas ≥ 0.5, then gas fuel is regarded as the "Primary fuel," and fDFgas = 1 and fDFliquid = 0 for each dual fuel engine.

      .2 If fDFgas < 0.5, gas fuel is not regarded as the "primary fuel." The CF and SFC in the EEDI calculation for each dual fuel engine (both main and auxiliary engines) should be calculated as the weighted average of CF and SFC for liquid and gas mode, according to fDFgas and fDFliquid, such as the original item of PME(i)· CFME(i) · SFCME(i) in the EEDI calculation is to be replaced by the formula below.

      PME(i)· (fDFgas(i)·(CFME pilot fuel(i) · SFCME pilot fuel(i) + CFME gas(i) · SFCME gas(i)) + fDFliquid(i) · CFME liquid(i) · SFCME liquid(i)) "

3 The following sentences are added at the end of existing paragraph 2.7.1:

"Reference lower calorific values of additional fuels are given in the table in paragraph 2.1 of these Guidelines. The reference lower calorific value corresponding to the conversion factor of the respective fuel should be used for calculation."

4 A new paragraph 2.12.4 is added after the existing paragraph 2.12.3 as follows:
  • ".4 For bulk carriers having R of less than 0.55 (e.g. wood chip carriers), the following cubic capacity correction factor, fc bulk carriers designed to carry light cargoes, should apply:

    fc bulk carriers designed to carry light cargoes = R -0.15

    where: R is the capacity ratio of the deadweight of the ship (tonnes) as determined by paragraph 2.4 divided by the total cubic capacity of the cargo holds of the ship (m3)."

5 Appendix 4 is replaced with the following:

Parent topic: Resolution MEPC.281(70) – Amendments to the 2014 Guidelines on the Method of Calculation of the Attained Energy Efficiency Design Index (EEDI) For New Ships (Resolution MEPC.245(66), as Amended by Resolution MEPC.263(68)) - (Adopted on 28 October 2016)
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