The initial data refer to the standard ambient reference conditions according to the International Standard Organisation (ISO 3046) [29]. The engine data; specific fuel consumption, temperature and mass flow rate of the exhaust gasses, jacket cooling water and scavenged air were acquired from the MAN engine room dimensioning software [30] for 6S70MC-C7-T1 engine and the corresponding engine project guide. These values are not constant. The only constant value used is the information about exhaust emissions got from MAN data for similar engine.