The ship's main diesel engine is used as the propulsion engine, usually a high-power, medium-speed engine. It transmits power to the propeller via a gearbox ratio change and changes the engine speed to match the actual load size and load. speed requirements during navigation;
The power generation diesel engine is used as the drive motor of the marine generator. The common speed is 1500 rpm (50 hz) or 1800 rpm (60 hz), which is determined by the power system. Vessel. It operates at its rated speed to provide power to the ship. According to the operating conditions, it is divided into: main generator set, parking generator set and emergency generator set.
I hope my answer can help you.
First, if electric energy thrusters are used, the problem of the energy sourceelectrical needs to be resolved. Whether it's transporting rechargeable batteries or using power generation, these are problems that cannot be solved with current technology.
Second, the power of electric thrusters is much lower than that of traditional diesel engines and is not enough to power large ships with a carrying capacity of tens of thousands or even hundreds of thousands tons.
The submarine has hybrid diesel-electric power. Although it has electric propulsion, it is primarily powered by a diesel engine. In combat mode, it uses electric power for propulsion to reduce noise.
I hope this helps you.