Appendix 4 – EEDI Calculation Examples for Use of Dual Fuel Engines
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Statutory Documents - IMO Publications and Documents - Resolutions - Marine Environment Protection Committee - Resolution MEPC.245(66) – 2014 Guidelines on the Method of Calculation of the Attained Energy Efficiency Design Index (EEDI) for New Ships – (Adopted on 4 April 2014) - Appendix 4 – EEDI Calculation Examples for Use of Dual Fuel Engines

Appendix 4 – EEDI Calculation Examples for Use of Dual Fuel Engines

 Standard main engine (HFO), standard auxiliary engines (HFO), no shaft generator:


MCRME = 15,000 kW  
Capacity = 25,000 DWT  
CF ME = 3.114  
CA ME = 3.114  
SFCME = 190 g/kWh  
SFCAE = 215 g/kWh  
vref = 18 kn  
PME = 0.75 x MCRME = 0.75 x 15,000 kW = 11,250 kW
PAE = (0.025 x MCRME ) + 250 kW = 625 kW
     
EEDI = [(PME x CF ME x SFCME ) + (PAE x CF,AE x SFCAE )] / (vref x Capacity)  
EEDI = [(11,250 x 3.114 x 190) + (625 x 3.114 x 215)] / (18 x 25,000)  
EEDI = 15.721 gCO2/tnm  

 Dual-fuel main engine and auxiliary engine (LNG, pilot fuel MDO; no shaft generator), LNG condition for tank capacity and/or operating time is fulfilled:


MCRME = 15,000 kW  
Capacity = 25,000 DWT  
CF,Gas = 2.750  
CF Pilotfuel = 3.206  
SFCME Pilotfuel = 6 g/kWh  
SFCME Gas = 160 g/kWh  
SFCAE Pilotfuel = 7 g/kWh  
SFCAE Gas = 180 g/kWh  
vref = 18 kn  
PME = 0.75 x MCRME = 0.75 x 15,000 kW = 11,250 kW
PAE = (0.025 x MCRME ) + 250 kW = 625 kW
     
EEDI = [(PME x (CF Pilotfuel x SFCME Pilotfuel + CF Gas x SFCME Gas )) + (PAE x (CF Pilotfuel x SFCAE Pilotfuel + CF Gas x SFCAE Gas ))] / (vref x Capacity)  
EEDI = [(11,250 x (3.206 x 6 + 2.750 x 160)) + (625 x (3.206 x 7 + 2.750 x 180))] / (18 x 25,000)  
EEDI = 12.200 gCO2/tnm  

 Dual-fuel main engine, standard auxiliary engines (HFO), no shaft generator, LNG condition for tank capacity and/or operating time for main engine is fulfilled:


MCRME = 15,000 kW  
Capacity = 25,000 DWT  
CF,Gas = 2.750  
CF Pilotfuel = 3.114  
CF AE = 3.114  
SFCME Pilotfuel = 6 g/kWh  
SFCME Gas = 160 g/kWh  
SFCAE = 215 g/kWh  
vref = 18 kn  
PME = 0.75 x MCRME = 0.75 x 15,000 kW = 11,250 kW
PAE = (0.025 x MCRME ) + 250 kW = 625 kW
     
EEDI = [(PME x (CF Pilotfuel x SFCME Pilotfuel + CF Gas x SFCME Gas )) + (PAE x (CF, AE x SFCAE )] / (vref x Capacity)  
EEDI = [(11,250 x (3.114 x 6 + 2.750 x 160)) + (625 x 3.114 x 215)] / (18 x 25,000)  
EEDI = 12.397 gCO2/tnm  

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