Effects of Coefficient of Excess Air on the Combustion Performance of Marine Two-Stroke Diesel Engine

Abstract:

The purpose of this study is to investigate the effect of the coefficient of excess air to the performance of engine. Through a series of the sea trials for newly built ships, the factors that have a great influence of engine’s performance are determined. In addition, methods of raising the coefficient of excess air are proposed to reduce the thermal load and accordingly enhance the performance of diesel engine. Finally, to achieve an efficient operation of the main engine, an example of trouble shooting and maintenance of the engine is given for practical applications. The scavenging pressure increased from 0.162 MPa to 0.207 MPa and the average exhaust temperature dropped from 423 °C to 336 °C under 90% load condition.

• Periodical: Applied Mechanics and Materials (Volume 214)
• Pages: 114-118
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.214.114
• Online since: November 2012
• Authors: Hai Jun Wei, Hai Bo Xie
• Keywords: Combustion, Excess Air, Fuel Oil, Marine Diesel Engine, α

References

[1] MAN B&W Diesel A/S, Emission Control Two-stroke Low-Speed Diesel Engines[R]. MAN B&W Diesel A/S. 1996, p-2, 12.

[2] Ogawa, H., N. Miyamoto, S. Nakazawa, and K. Akao. Smokeless and low NOx combustion in a dual-fuel diesel engine with induced natural gas as the main fuel[J]. International Journal of Enigne Research, 2003(1), pp.1-9.

DOI: 10.1243/146808703762826615

[3] Pulkrabek, W.W. Engineering Fundamentals of the Internal Combustion Engine[J]. Pearson Prentice Hall, New Jersey (2003).

[4] Yokomura, H., S. Kohketsu, and K. Mori. EGR System in a Turbocharged and Intercooled Heavy-Duty Diesel Engine[J]. Expansion of EGR Area with Venturi EGR System, Mitsubishi Motors, Technical Review, 2003(15), 14-20.

DOI: 10.1016/s0389-4304(97)85104-1

[5] Andreadis, P.; Zompanakis, A.; Chryssakis, C.; Kaiktsis, L. Effects of the fuel injection parameters on the performance and emissions formation in a large-bore marine diesel engine[J] International Journal of Engine Research, 2011(1), pp.14-29.

DOI: 10.1243/14680874jer511

[6] Ozsoysal, Osman Azmi. Effects of varying air-fuel ratio on the performance of a theoretical Diesel cycle[J]. International Journal of Exergy, 2010(6), pp.654-666.

DOI: 10.1504/ijex.2010.035513

[7] Lin, C. -Y.; Huang, J. -C. An oxygenating additive for improving the performance and emission characteristics of marine diesel engines[J]. Ocean Engineering, 2003(13), pp.1699-1715.

DOI: 10.1016/s0029-8018(02)00149-x