M.V. – Motor Vessel
(i)Diesel Engine Propulsion
- 2 stoke Diesel Engine – Low/Slow Speed (< 300 rpm)
Propeller shaft is connected directly to the Main Engine
Constant pitch propeller is used
Speed of the ship is controlled by changing the speed of Main Engine
Reversing is done by changing the direction of rotation of the ME
- b. 4 stroke Diesel Engine – Medium (300 -900 rpm)/High Speed (>900 rpm)
Propeller shaft is connected to Main Engine through a gear box
Speed of the ship is controlled by changing the pitch of the Controllable Pitch propeller (CPP)
Reversing is done by changing the pitch of the Controllable Pitch propeller (CPP)
- C. 2-stroke Dual Fuel Engine – runs on both HFO & LNG Cargo ‘Boil Off’ Gas is used as the second fuel in LNG Carrier(ii) Diesel Electric Propulsion – Electrical Motor is used for propulsion
Diesel Engine (Generators) are used to power the electrical motors
Propeller shaft is connected to Electrical Motor
Speed of ship & reversing is controlled by controlling the speed of the motor
Reversing is controlled by rotating the propeller assembly
- S.S – Steam Ship
(i)Reciprocating Steam Engine
(ii) Steam Turbines
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Steam turbines are found on nuclear-powered Naval Ships (nuclear reactor heats the water to create steam. Steam drives the turbines)
Dual Fuel Turbines – Cargo ‘Boil off’ gas is used as fuel for the boilers, which provide steam for the turbines
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Gas Turbines Used as ME for propulsion in Naval Ships and in some passenger ships.
Main Engine Plants & Supporting Systems:
Diesel Engine Working Principle (MEACS IV Unit I)
Starting Air System
Fuel Oil System (Supply and Injection)
Scavenging & Exhaust Gas System
Lubrication Oil System (Bearings and Cylinder Lubrication)
Cooling Water System
Control Devices (Governors, Reversing)
Operations – Standby, Starting, Reversing, Manoeuvring, Full speed
Bridge Control System