Preliminary communication
https://doi.org/10.7225/toms.v03.n01.003
Optimization of Ship Propulsion Diesel Engine to Fulfill the New Requirements for Exhaust Emissions
Branko Lalić
orcid.org/0000-0001-9607-1388
; University of Split, Faculty of Maritime Studies, Split, Croatia
Ivan Komar
; University of Split, Faculty of Maritime Studies, Split, Croatia
Danilo Nikolić
; Faculty of Maritime Studies, Kotor, Montenegro
Abstract
Impacts of exhaust gas emissions on the environment and
air pollution from ships have received considerable attention in
the past few decades. Due to the characteristics of the combustion
process, typical for large marine two-stroke low-speed engines,
and the use of residual fossil fuels, the world’s fleet emits into the
atmosphere significant amount of pollutants such as nitrogen
oxides (NOx), carbon monoxide (CO), carbon dioxide (CO2),
hydrocarbons (HC), sulphur oxides (SOx) and carbon particles
(PM). Impact assessment of the process of their formation,
emitted amounts and the influence of emission are important
factors for decision making in regulation development and also
for engine designers who aim to improve low-speed two-stroke
marine engines, for further tightening of regulations regarding
limiting emissions. This paper consists of three parts: the first
section describes the injection and combustion process in lowspeed
two-stroke marine engines, the second part describes
the formation of the exhaust gas emissions as a product of the
combustion process and the third part, in which the known
techniques to reduce harmful emissions that are currently used
in low-speed two-stroke marine engines are described.
Keywords
Two-stroke low-speed marine diesel engines; Fuel injection; Combustion; Pollutant formation and composition; Reduction methods
Hrčak ID:
120180
URI
Publication date:
20.4.2014.
Visits: 1.697 *