An Engine Room Simulator as a Tool for Environmental Education of Marine Engineers - New Contributions in Information Systems and Technologies - page 298

Emulsion characteristics, fuel pumps setting and average exhaust gas temperature
at the outlet of the cylinder are shown in Fig.5.
It is significant for the student to observe that the amount of water in the FWE has
no influence on the engine power. The engine reaches the same effective power for
the setting speed no matter if it operates using pure fuel or emulsion. For this purpose
the fuel pump setting increases. For the emulsion of 30% m/m water amount, the
increase of the fuel pump setting was equal to 19,7% at 70 rpm. To provide an
appropriate fuel atomisation in the cylinders, a constant fuel viscosity is maintained at
the engine inlet. To sustain the recommended viscosity at the level of 15 cSt, the
viscometer increased the fuel temperature from 120°C to 144°C for the water amount
of 30% in the emulsion. Moreover, the students may observe that together with higher
engine load and increasing water amount in the emulsion, there is an insignificant fall
of the FWE pressure at the engine inlet.
Fig. 5. Selected speed characteristics of the main engine