Effects of Enriched Oxygen and Nitrogen Intake on Combustion Process and Emission Features in a Diesel Engine
Publication: Journal of Energy Engineering
Volume 143, Issue 3
Abstract
A single-cylinder, naturally aspirated, air-cooled diesel engine is used to study the effects of variable oxygen-enriched and nitrogen-enriched intake charge on engine combustion features and emission characteristics. The results show that with the increase in intake oxygen concentration from nitrogen-enriched modes, the ignition delay is decreased, and the maximum pressure rise rate and peak pressure are increased. The effect of enriched nitrogen on prolonging ignition delay appears to be more evident than that of enriched oxygen on shortening the ignition delay. As a whole, the increase rate of four types of pollutants show a quadratic polynomial relationship with the increase rate of intake oxygen. In oxygen-enriched modes, the effects of increased oxygen on the reduction of hydrocarbons (HC) and carbon monoxide (CO) emissions and smoke become weak, whereas in nitrogen-enriched modes, the CO and HC emissions and smoke deteriorate rapidly. Nitrogen oxide () emissions are steeply increased in oxygen-enriched modes, but slowly decline in nitrogen-enriched modes. At high loads, the oxygen supply is restricted, so the effect of the intake oxygen variation on CO emissions and smoke is enhanced. However, at low loads, the intake oxygen significantly affects the bulk gas temperature in cylinder, resulting in a more sensitive variation in HC and emissions.
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Acknowledgments
The authors wish to express their appreciation for the funds from the National Natural Science Foundation of China (No. 51376083 and No. 51376095) and the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), which supported this study.
References
Ajhar, M., Follmann, M., Matthias, C., and Melin, T. (2008). “Membranes producing nitrogen-enriched combustion air in diesel engines: Assessment via dimensionless numbers.” J. Membr. Sci., 323(1), 105–112.
Arrègle, J., López, J. J., García, J. M., and Fenollosa, C. (2003). “Development of a zero-dimensional diesel combustion model. Part 1: Analysis of the quasi-steady diffusion combustion phase.” Appl. Therm. Eng., 23(11), 1301–1317.
Byun, H., Hong, B., and Lee, B. (2006). “The effect of oxygen enriched air obtained by gas separation membranes from the emission gas of diesel engines.” Desalination, 193(1–3), 73–81.
Caton, J. A. (2005). “The effects of oxygen enrichment of combustion air for spark ignition engines using a thermodynamic cycle simulation.” ASME 2005 Internal Combustion Engine Division Spring Technical Conf., ASME, New York, 135–147.
Chin, J. S. (1983). “Analysis of the effect of oxygen addition on minimum ignition energy.” J. Energy, 7(6), 710–715.
Christodoulou, F., and Megaritis, A. (2013). “Experimental investigation of the effects of separate hydrogen and nitrogen addition on the emissions and combustion of a diesel engine.” Int. J. Hydrogen Energy, 38(24), 10126–10140.
Donahue, R. J., and Foster, D. E. (2000). Effects of oxygen enhancement on the emissions from a DI diesel via manipulation of fuels and combustion chamber gas composition, Society of Automotive Engineers International, Troy, MI.
Giakoumis, E. G., Rakopoulos, D. C., and Rakopoulos, C. D. (2016). “Combustion noise radiation during dynamic diesel engine operation including effects of various biofuel blends: A review.” Renewable Sustainab. Energy Rev., 54, 1099–1113.
Karim, G. A., and Ward, G. (1968). Examination of combustion processes in compression ignition engine by changing the partial pressure of oxygen in the intake charge, Society of Automotive Engineers International, Troy, MI.
Ladommatos, N., Balian, R., Horrocks, R., and Cooper, L. (2000). The effect of exhaust gas recirculation on soot formation in a high-speed direct-injection diesel engine, Society of Automotive Engineers International, Troy, MI.
Liang, Y. C., Shu, G. Q., Wei, H. Q., and Zhang, W. (2013). “Effect of oxygen enriched combustion and water-diesel emulsion on the performance and emissions of turbocharged diesel engine.” Energy Convers. Manage., 73(5), 69–77.
Logan, S. R. (1996). Fundamentals of chemical kinetics, Addison-Wesley Longman, London.
Nemser, S., Stookey, D., and Nelson, J. (2003). “Diesel engine reduction via nitrogen-enriched air.” Fluid/Particle Sep. J., 15(1), 69–80.
Poola, R. B., Longma, D. E., Anderson, J. L., Stork, K. C., and Sekar, R. (2000). Membrane-based nitrogen-enriched air for reduction in light-duty diesel engines, Society of Automotive Engineers International, Troy, MI.
Poola, R. B., and Sekar, R. (2003). “Reduction of and particulate emissions by using oxygen-enriched combustion air in a locomotive diesel engine.” J. Eng. Gas Turbines Power, 125(2), 524–533.
Rakopoulos, C. D., Antonopoulos, K. A., and Rakopoulos, D. C. (2007). “Experimental heat release analysis and emissions of a HSDI diesel engine fueled with ethanol-diesel fuel blends.” Energy, 32(10), 1791–1808.
Rakopoulos, C. D., Rakopoulos, D. C., and Giakoumis, E. G. (2015). “Impact of properties of vegetable oil, bio-diesel, ethanol and n-butanol on the combustion and emissions of turbocharged HDDI diesel engine operating under steady and transient conditions.” Fuel, 156, 1–19.
Rakopoulos, D. C., Rakopoulos, C. D., and Giakoumis, E. G., Papagiannakis, R. G., and Kyritsis, D. C. (2014). “Influence of properties of various common bio-fuels on the combustion and emission characteristics of high-speed DI (direct injection) diesel engine: Vegetable oil, bio-diesel, ethanol, n-butanol, diethyl ether.” Energy, 73(9), 354–366.
Shudo, T., and Yamada, H. (2007). “Hydrogen as an ignition-controlling agent for HCCI combustion engine by suppressing the low-temperature oxidation.” Int. J. Hydrogen Energy, 32(14), 3066–3072.
Song, K. H., Nag, P., Litzinger, T. A., and Haworth, D. C. (2003). “Effects of oxygenated additives on aromatic species in fuel-rich, premixed ethane combustion: A modeling study.” Combust. Flame, 135(3), 341–349.
Tree, D. R., and Svensson, K. I. (2007). “Soot process in compression ignition engines.” Prog. Energy Combust. Sci., 33(3), 272–309.
Zhang, W., Chen, Z. H., Li, W. D., Shu, G. Q., Xu, B., and Shen, Y. G. (2013). “Influence of EGR and oxygen-enriched air on diesel engine NO–Smoke emission and combustion characteristic.” Appl. Energy, 107(3), 304–314.
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Published In
Journal of Energy Engineering
Volume 143 • Issue 3 • June 2017
Copyright
©2016 American Society of Civil Engineers.
History
Received: Jun 23, 2016
Accepted: Sep 6, 2016
Published online: Oct 27, 2016
Discussion open until: Mar 27, 2017
Published in print: Jun 1, 2017
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