A type of internal combustion engine that completes a power cycle in two strokes of the piston (one revolution of the crankshaft). Two-stroke diesel engines are the dominant propulsion choice for large commercial vessels due to their high thermal efficiency, ability to burn heavy fuel oil, and low operating speeds suitable for direct-drive propeller coupling.
Category: Marine Engineering
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LNG FuelLiquefied natural gas used as a marine fuel to power ship engines, offering significant reductions in sulphur oxides, nitrogen oxides, and particulate matter emissions compared to conventional heavy fuel oil.ScrubberAn exhaust gas cleaning system (EGCS) installed on ships to remove sulphur oxides (SOx) and particulate matter from engine exhaust gases, enabling the use of high-sulphur fuel oil while meeting MARPOL Annex VI emission limits.ShaftThe rotating mechanical component that transmits power from the main engine to the propeller.Shaft GeneratorAn electrical generator driven by the main engine through the propeller shaft, used to produce electrical power while the vessel is at sea.Stern TubeA watertight tube through which the propeller shaft exits the hull at the stern of the vessel.Waste Heat RecoveryA system that captures thermal energy from the main engine's exhaust gases and cooling water to generate additional electrical power or steam.
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