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Average emissions and energy use of a passenger ship in 2016
Ferry, 18 kn CO HC NOx PM CH4 N2O SO2 CO2 CO2e Fuel
consumption
Energy [MJ]
[g/ship km]   509 190 2 692 103 24 5.3 138 231 957 234 149 73 614 3 039
[g/pkm] 0.31 0.12 1.7 0.063 0.015 0.0033 0.085 143 144 45 1.9
Passenger
capacity
[passengers]
Power Usage, passengers (share of max capacity) Specific consumption
GT DWT Main engines Speed Distance Main engines Aux. engines
[t] [t] [kW] [knots] [km] [%] [g/kWh] [g/kWh]
2 600 36 000 3 000 23 000 18 500 50% 205 210
Ferry, 18 kn, gas driven CO HC NOx PM CH4 N2O SO2 CO2 CO2e Fuel
consumption
Energy [MJ]
[g/ship km]   851 710 331 38 80 1.1 0.142 195 120 197 468 70 953 3 498
[g/pkm] 0.43 0.36 0.17 0.019 0.040 0.00057 0.000071 98 122 36 1.8
Passenger
capacity
[passengers]
Power Usage, passengers (share of max capacity) Specific consumption
GT DWT Main engines Speed Distance Main engines Aux. engines
[t] [t] [kW] [knots] [km] [%] [g/kWh] [g/kWh]
2 800 58 000 5 000 30 000 18 300 57% 150 150
                         
Ferry, 18 kn, Finland - Estonia CO HC NOx PM CH4 N2O SO2 CO2 CO2e Fuel
consumption
Energy [MJ]
[g/ship km]   585 226 2 386 118 29 6 160 267 783 270 313 84 984 3 495
[g/pkm] 0.31 0.12 1.3 0.063 0.015 0.0033 0.085 143 144 45 1.9
Passenger
capacity
[passengers]
Power Usage, passengers (share of max capacity) Specific consumption
GT DWT Main engines Speed Distance Main engines Aux. engines
[t] [t] [kW] [knots] [km] [%] [g/kWh] [g/kWh]
3 000 60 000 5 000 30 000 18 88 50% 205 210
Ferry, 24-27 kn, Finland - Estonia CO HC NOx PM CH4 N2O SO2 CO2 CO2e Fuel
consumption
Energy [MJ]
[g/ship km]   753 318 3 091 153 39 8 208 348 611 351 902 110 635 4 508
[g/pkm] 0.60 0.25 2.5 0.12 0.031 0.0062 0.17 279 282 89 3.6
Passenger
capacity
[passengers]
Power Usage, passengers (share of max capacity) Specific consumption
GT DWT Main engines Speed Distance Main engines Aux. engines
[t] [t] [kW] [knots] [km] [%] [g/kWh] [g/kWh]
2 000 34 000 5 000 44 000 24 88 50% 205 210
High speed craft, 40 kn, Finland - Estonia CO HC NOx PM CH4 N2O SO2 CO2 CO2e Fuel
consumption
Energy [MJ]
[g/ship km]   196 87 1 613 40 10.4 2.0 54 91 290 92 151 28 972 1 173
[g/pkm] 0.98 0.44 8.1 0.20 0.052 0.010 0.27 456 461 145 5.9
Passenger
capacity
[passengers]
Power Usage, passengers (share of max capacity) Specific consumption
GT DWT Main engines Speed Distance Main engines Aux. engines
[t] [t] [kW] [knots] [km] [%] [g/kWh] [g/kWh]
400 950 60 9 000 40 88 50% 205 210
                         
Ropax, 21 kn, Finland - Germany CO HC NOx PM CH4 N2O SO2 CO2 CO2e Fuel
consumption
Energy [MJ]
[g/ship km]   670 297 5 517 136 35.4 6.9 186 312 063 315 008 99 036 4 014
[g/pkm] 0.56 0.25 4.6 0.11 0.029 0.0057 0.15 259 262 82 3.3
Passenger
capacity
[passengers]
Power Usage, passengers (share of max capacity) Specific consumption
GT DWT Main engines Speed Distance Main engines Aux. engines
[t] [t] [kW] [knots] [km] [%] [g/kWh] [g/kWh]
550 46 000 9 000 42 000 21 1 200 35% 205 210
Ropax, 24 kn, Finland - Germany CO HC NOx PM CH4 N2O SO2 CO2 CO2e Fuel
consumption
Energy [MJ]
[g/ship km]   1081 485 8 909 220 58 11 301 504 219 508 976 160 019 6 477
[g/pkm] 0.82 0.37 6.8 0.17 0.044 0.0085 0.23 384 388 122 4.9
Passenger
capacity
[passengers]
Power Usage, passengers (share of max capacity) Specific consumption
GT DWT Main engines Speed Distance Main engines Aux. engines
[t] [t] [kW] [knots] [km] [%] [g/kWh] [g/kWh]
600 40 000 8 000 44 000 24 1 200 35% 205 210
Emission factors include both directions, thus return trip need not to be calculated
Ferries carry both passengers and freight; 80% of emissions are allocated to passengers, 20% to freight.
Ropax ships carry both freight and passengers; 84% of emissions are allocated to freight, 16% to passengers.
g/ship km = grams per ship kilometre (the transport of the entire ship over one kilometre)
g/pkm = grams per passenger kilometre (the transport of one passenger over one kilometre)
DWT = deadweight tonnage = the sum of the masses of cargo, fuel, fresh water, ballast water, provisions, passengers and crew
CO = carbon monoxide, HC = total hydrocarbons (including methane CH4), NOx = nitrogen oxides, PM = particulate matter, CH4 = methane, N2O = nitrous oxide, SO2 = sulphur dioxide, CO2 = carbon dioxide, CO2e = equivalentic CO2 (CH4 factor 25, N2O factor 298), MJ = megajoule 
VTT Technical Research Centre of Finland Ltd
LIPASTO unit emissions database
Last updated 6.7.2017