Abstract
Taking into consideration the quality of air, it is necessary to ensure a continued reduction of the gaseous emissions that are produced by the maritime transport. The most effective solution of this serious worldwide problem is application of a suitable fuel mixture, which contains a bio-component, i.e. the biofuel. The presented scientific study is focused on influence of the biofuels on production of the gaseous emissions in the case of a diesel auxiliary engine, which is used in the ship transport. There were created various fuel mixtures with different content of the bio-component in order to investigate their emission characteristics. The individual experimental measurements were performed at the different engine loading levels and using a variable engine speed spectrum. The obtained results demonstrated a significant influence of the fuel mixtures on the whole combustion process, on the heat release process, on the pressure time behaviour as well as on the engine emission characteristics.
Highlights
It is a well-known fact that a large amount of the international transport of various goods and materials is carried out by the sea
It is necessary to emphasize such reality that the sea transport is characterized by a high fuel consumption as well as by production of a large volume of the harmful gaseous emissions
There is often neglected a relevant fact that the ship transport causes more serious and more dangerous air pollution than the standard motor vehicles
Summary
It is a well-known fact that a large amount of the international transport of various goods and materials is carried out by the sea. The diesel engines installed in the trans-continental ships are burning the heavy fuel oils (HFO) both in the main driving engines and in the auxiliary diesel engines. This kind of fuel produces a large amount of the harmful gaseous emissions. The results gained from the performed studies show a positive fact that the values of sulfur, CO emissions, unburned hydrocarbons, and particulate matter were significantly reduced in the exhaust gases compared to the standard diesel fuels. There were tested diesel engine fuels with other ratios between the biodiesel and the ULSDF, but with regard to the main goal of this study, the above-mentioned fuel mixing ratios were the most suitable. Engine Loading 267 Nm (30%) 534 Nm (60%) 801 Nm (90%) 321 Nm (30%) 642 Nm (60%) 963 Nm (90%)
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