Title: Exergy analysis of combustion characteristics and NO_x emissions of a dual-fuel engine

Authors: Mohamed H. Morsy; Abdelrahman El-Leathy; Arif Hepbasli

Addresses: Department of Mechanical Engineering, College of Engineering, King Saud University, Riyadh 11421, Saudi Arabia ' Department of Mechanical Engineering, College of Engineering, King Saud University, Riyadh 11421, Saudi Arabia ' Department of Mechanical Engineering, College of Engineering, King Saud University, Riyadh 11421, Saudi Arabia

Abstract: The combustion characteristics and NO_x emissions of compression ignition engines working on a dual fuel mode are investigated numerically and their exergetic efficiencies are determined. The model has been validated with available experimental results. The simulation results show that dual fuel engine combustion and trend of NO_x emissions are well predicted by the present model. Parametric study showed improvements in engine performance and an increase in NO_x emissions with decreased advanced injection timing of the pilot fuel as well as with increased intake temperature and pilot fuel quantity. The maximum values for energy and exergy are found to be comparable.

Keywords: engine simulation; dual fuel engines; pilot injection; injection timing; intake temperature; NOx emissions; energy analysis; exergy analysis; nitrogen oxides; combustion characteristics; compression ignition engines; exergy efficiency; engine performance; vehicle emissions.

DOI: 10.1504/IJEX.2012.047505

International Journal of Exergy, 2012 Vol.10 No.4, pp.417 - 441

Received: 19 Sep 2011
Accepted: 22 Sep 2011
Published online: 25 Jun 2012 *

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