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Average emissions and energy use of a pusher barge in 2016
Pusher barge, small CO HC NOx PM CH4 N2O SO2 CO2 CO2e Fuel
consumption
Energy [MJ]
[g/ship km]   173 64 1 755 25 6.9 1.8 42 70 472 71 193 22 605 913
[g/tkm] 0.058 0.021 0.58 0.0084 0.0023 0.00061 0.014 23 24 7.5 0.30
Power Bulk freight weight
of DWT
Specific consumption
GT DWT Main engines Speed Distance Main engines Aux. engines
[t] [t] [kW] [knots] [km] [%] [g/kWh] [g/kWh]
3 000 6 000 2 500 9 400 50% 195 210
Pusher barge, large CO HC NOx PM CH4 N2O SO2 CO2 CO2e Fuel
consumption
Energy [MJ]
[g/ship km]   431 159 4 341 63 17 4.6 106 176 278 178 078 56 521 2 283
[g/tkm] 0.044 0.016 0.44 0.0065 0.0018 0.00047 0.011 18 18 5.8 0.23
Power Bulk freight weight
of DWT
Specific consumption
GT DWT Main engines Speed Distance Main engines Aux. engines
[t] [t] [kW] [knots] [km] [%] [g/kWh] [g/kWh]
9 000 14 000 8 000 12 400 70% 195 210
Emission factors include both directions, thus return trip need not to be calculated
g/ship km = grams per ship kilometre (the transport of the entire ship over one kilometre)
g/tkm = grams per tonne kilometre (the transport of one net tonne 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