engleski

RESULTS OF THE ANALYSIS OF THE EFFECTS OF LOW- SULPHUR FUEL OIL ON THE OPERATION OF THE MARINE TWO-STROKE SLOW-SPEED DIESEL ENGINE

Exhaust gas emissions are often directly related to the impurities in marine fuels. High level of sulphur oxides (SOx) and nitrogen oxides (NOx) in the exhaust gas emissions is an inevitable result of using heavy fuel oil (HFO). The requirements introduced in some shipping for reducing SOx emissions from the marine two-stroke slow-speed diesel engines areas have resulted in using low-sulphur fuel oils in diesel engine operation or install the exhaust gas cleaning system. Using HFO with high sulphur contents has become unacceptable after the regulations brought by Annex VI of the International Convention for the Prevention of Pollution from Ships (MARPOL 73/78), the designation of some seas as particularly sensitive areas (Emission Control Areas – ECA) and the implementation of the ship exhaust emissions in the ECAs. The maximum allowed fuel sulphur content in European ECAs amounts to 0.1 % for ships in ports and all inland waterways across the European Union, whereas California Air Resources Board (CARB) applies the regulation limiting the sulphur content in fuel to 0.1 % within 24 NM off the California's shoreline [1], [10], [13]. This paper discusses the results produced by the analysis of the problems occurring when using low sulphur fuel oils in the operation of marine two- stroke slow-speed diesel engines. The paper analyses the effects of the low sulphur fuel on the fuel injection system, fuel combustion and liner lubrication, as well as the measures taken to prevent possible damage to engine components [1], [12], [13].

low-sulphur fuel, combustion, lubrication, cylinder liner, viscosity

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