Abstract
The paper describes the method of a sea boats online diagnostic with the use of the main and accompanying processes analyses. The paper concerns injection and combustion processes taking place in internal combustion engines of the military boats. Authors chosen vibroacoustic processes in the research to obtain the important diagnostic information on the above processes runs and their correctness in the sources of a drive of the HDV off-road water transport vehicles. The specified method of a digital data acquisition for dynamic processes in such combustion engines and sort of diagnostic parameters taken into account were basis of the required empirical research process and further signal analyses. High accuracy of the measurement methodology and process with additional conditions caused the authors could take the obtained signals to the parallel, combustion engineering and vibroacoustic engineering process, according to which they extract important information on the combustion processes runs and their problems. Identification of such problems and its type was helpful to build algorithm of the diagnostic assessment of such processes in the point of view of building diagnostic system for such military boats with the regime of the efficiency of the energy changes and emission control in the all exploitation period.
Highlights
The paper describes the method of a sea boats online diagnostic with the use of the main and accompanying processes analyses
For the known run of the specific emission of the screw propeller characteristic eZT = f(n), an emission stream for a toxic compound is influenced by a power value which corresponds with specific torque of the propeller system, for a specific engine speed, according to an equation [1,2,3, 6]: EZTi = eZTi · Pei [g/h]
MARPOL Annex VI, first adopted in 1997 by International Maritime Organization (IMO), limits two main air pollutants contained in ships exhaust gas: nitrous oxides (NOx) and sulphur oxides (SOx)
Summary
Air pollution from ships causes a cumulative effect that contributes to the overall air quality problems encountered by populations in many areas, and affects the natural environment, such as though acid rain. MARPOL Annex VI, first adopted in 1997 by International Maritime Organization (IMO), limits two main air pollutants contained in ships exhaust gas: nitrous oxides (NOx) and sulphur oxides (SOx). It prohibits deliberate emissions of ozone depleting substances, regulates shipboard incineration, and the emissions of volatile organic compounds from tankers [4]. The revised NOx Technical Code 2008 includes a new chapter based on the agreed approach for regulation of existing engines, which have been installed before 2000, established in MARPOL Annex VI, provisions for a direct measurement and monitoring method, a certification procedure for existing engines, and test cycles to be applied to Tier II and Tier III engines [4,5, 7]. Na emisję globalną z jednostek pływających ma ponadto wpływ przeznaczenie jednostki, jej wielkość, rodzaj i liczba silników, rodzaj zastosowanego układu napędowego oraz poziom techniczny jednostki pływającej
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