Emission factors will here be given in mass of emission per mass of consumed fuel. The basic emission factors used (from Cooper and Gustafsson) are given per type of engine (slow speed, medium speed, high speed, gas turbine, steam turbine) and fuel (residual oil, marine distillates). Here we need emission factors per ship type and fuel type. The distribution on engine types for different ship types are therefore obtained from Entec 2002 and emission factors per ship type and fuel type are calculated.

Engine type distribution for different ship types.