6. Please show technical characteristics of diesel engine propulsion plant?

-Working substance is combustion of air – fuel mixing formed in engine combustion chamber.

-Thermal efficiency is high while specific fuel consumption is low.

-Output is not continuously generated. It should be provided with air and gas distributors suitable for suction and exhaust cycles of the main engine.

-Generate reciprocating forces and inertia moments when working. These inertia forces and moments vibrate body of engine and ship’s hull. The balance of a diesel is depended on weight of the engine moving parts, number of cylinders and suitable arrangement of cranks.

-Engine parts withstand also the forces vary cyclically. These characteristics limit an increase in power and revolution of main engine.

-Immediate pressures and tempretures in the engine combustion chamber are very high; the engine parts have to work in high temperature and friction condition so the longevity of diesel engine are reduced.

-Moving rule of the pistons in depend on direction of crank shaft so rotation direction of diesel engines can be easily reversed by change work order of starting mechanism

-In light load conditions, diesel engines are not working economically and stably

-It is flexible because of short time for starting

-Heat energy, which goes out of engine with gas is high; so that we can re-use

-Efficiency of Diesel engine MPP about  35 – 55%