RT Journal Article
T1 Internal modifications to reduce pollutant emissions from marine engines. A numerical approach
A1 Lamas Galdo, María Isabel
A1 Rodríguez Vidal, Carlos Gervasio
A1 Rodríguez García, Juan de Dios
A1 Telmo Miranda, Javier
K1 Marine diesel engine
K1 Emissions
K1 Combustion
K1 Computational fluid dynamics (CFD)
AB Taking into account the increasingly stringent legislation on emissions from marine engines, this workaims to analyze several internal engine modifications to reduce NOx (nitrogen oxides) and other pollutants. To this end,a numerical model was employed to simulate the operation cycle and characterize the exhaust gas composition. After apreliminary validation process was carried out using experimental data from a four-stroke, medium-speed marine engine, the numerical model was employed to study the influence of several internal modifications, such as water additionfrom 0 to 100% water to fuel ratios, exhaust gas recirculation from 0 to 100% EGR rates, modification of the overlaptiming from 60 to 120°, modification of the intake valve closing from 510 to 570°, and modification of the cooling watertemperature from 70 to 90 oC. NOx was reduced by nearly 100%. As expected, it was found that, by lowering the combustion temperature, there is a notable reduction in NOx, but an increase in CO (carbon monoxide), HC (hydrocarbons)and consumption.
PB Elsevier
SN 2092-6782
YR 2013
FD 2013
LK http://hdl.handle.net/10347/21888
UL http://hdl.handle.net/10347/21888
LA eng
NO Lamas, M.I., Rodríguez, C.G., Rodríguez, J.D., Telmo, J. (2013). Internal modifications to reduce pollutant emissions from marine engines. A numerical approach, "International Journal of Naval Architecture and Ocean Engineering", vol. 5, n. 4, p. 493-501
DS Minerva
RD 28 abr 2026