COGES as a future of marine propulsion plants

The paper presents results of analysis concerning type of seagoing ships propulsion plants concerning efficiency, kind of fuel used and influence of propulsion plant operation on marine environment. Application of innovatory combined turbine propulsion plants where gas turbines are thermodynamically connected with steam turbines allows achievement of high efficiency about 60%. Modern design of turbines and using natural gas as a fuel are very important. Gas fuel is characterised by lowered harmfulness for environment than traditional heavy fuel oil. Particularly gas fuel does not contain sulphur and gas fuel exhaust gases are free of solid particles. Additionally calorific value of gas fuel is 25% higher than heavy fuel oil thus the amount of exhaust gases and carbon dioxide emitted to atmosphere are reduced.