engleski

EXHAUST EMISSIONS FROM MARINE 4-STROKE ENGINE ON THE THREE FUEL TYPES

Exhaust emissions from ships are the focus of environmental protection today. The combustion of fossil fuels produces various exhaust gasses, but the most important are sulfur oxides, nitrogen oxides and the greenhouse gas carbon dioxide. The aim of this paper is to compare the three fuel types used for propulsion in DFDE engines (MAN -B&W, type: 8L51/60DF), to describe their main characteristics and to list the advantages and disadvantages of their use in terms of economy and environmental friendliness. The focus is on nitrogen oxides and the greenhouse gas carbon dioxide, which are produced during the combustion of marine diesel engines. Specific fuel oil consumption is also considered as a function of engine load and mode of operation. The first part of the paper describes the formation of NOx and CO2 in the combustion process of marine engines and their impact on the environment. The main provisions of MARPOL (Annex VI) are also given. The second part of this paper brings a series of measurements on the ship simulator (5000 TechSim Dual Fuel Diesel-Electric LNG Carrier, version 8.8) of exhaust emissions at three different fuel types (Marine Diesel Oil, Heavy Fuel Oil and Liquefied Natural Gasses) at different engine loads were performed and the obtained data were graphically presented in the diagram and compared with the data from a testbed of the same engine type.

Dual fuel diesel engine, gas emission, nitrogen oxid, carbon dioxid, simulator

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