A system that captures thermal energy from the main engine's exhaust gases and cooling water to generate additional electrical power or steam. Waste heat recovery systems improve overall propulsion plant efficiency by converting energy that would otherwise be lost, reducing fuel consumption by up to 8-10 percent.
Category: Marine Engineering
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EEXIEnergy Efficiency Existing Ship Index, a measure introduced by the IMO to reduce the carbon intensity of existing ships by requiring them to meet a minimum energy efficiency standard.Four-Stroke EngineA type of internal combustion engine that completes a power cycle in four strokes of the piston (two revolutions of the crankshaft).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.Stern TubeA watertight tube through which the propeller shaft exits the hull at the stern of the vessel.
Back to DictionaryEntry updated May 2026