Combustion Characteristics of Ethanol with Ignition Improver in a Small Diesel Engine during Start-up

  • Kitti Iempremjit Rajamangala University of Technology Lanna
Keywords: Combustion Characteristics, Ethanol, Ignition improver, CI engine

Abstract

This work aimed to study the combustion characteristics of ethanol with ignition improver, glycerol ethoxylate (GE) during start-up condition. Preliminary test performed in a diesel engine with a compression ratio of 18 and varying concentrations of GE from 2-35%. Results showed the ethanol blended with ignition improver concentration from 2-35% unable to start the engine. The modified diesel engine with a compression ratio of 23 was tested under controlled room conditions with varying concentrations of GE. The results showed the ethanol blended with minimum ignition improver concentration for starting the engine was 13%. Effects of improver concentration on combustion characteristics during start-up conditions were analyzed by measuring the in-cylinder pressure. Results showed that there were fewer variations of the start of injection (SOI) and start of combustion (SOC) when the concentration of ignition improvers more than 24%. The differences with diese were 2.5-3%, 3.0-3.8o and 3.4-8.8o for IMEP, SOI and SOC, respectively. The increased concentrations of ignition improvers reduced ignition delay (ID) and the number of misfire cycles in the engine during start-up period. Ethanol with 28% GE was the minimal amounts of ignition improver required to meet almost zero misfire cycles as in the diesel case.

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References

Abu-Qudais, M., Haddad, O., & Qudaisat, M. (2000). The effect of alcohol fumigation on diesel engine performance and emissions. Energy conversion and management, 41(4), 389-399.
Bika, A. S., Franklin, L. M., & Kittelson, D. B. (2009). Hydrogen as a combustion modifier of ethanol in compression ignition engines (No. 2009-01-2814). SAE Technical Paper.
Enright, B., Borman, G. L., & Myers, P. S. (1988). A critical review of spark ignited diesel combustion. SAE Transactions, 1645-1662.
Eugene, E. E., Bechtold, R. L., Timbario, T. J., & McCallum, P. W. (1984). State-of-the-art report on the use of alcohols in diesel engines. SAE paper, 840118.
Ishida, M., Yamamoto, S., Ueki, H., & Sakaguchi, D. (2010). Remarkable improvement of NOx–PM trade-off in a diesel engine by means of bioethanol and EGR. Energy, 35(12), 4572-4581.
Koç, M., Sekmen, Y., Topgül, T., & Yücesu, H. S. (2009). The effects of ethanol–unleaded gasoline blends on engine performance and exhaust emissions in a spark-ignition engine. Renewable energy, 34(10), 2101-2106.
Mueller, C. J., & Musculus, M. P. (2001). Glow plug assisted ignition and combustion of methanol in an optical DI diesel engine (No. 2001-01-2004). SAE Technical Paper.
Munsin, R., Laoonual, Y., Jugjai, S., Matsuki, M., & Kosaka, H. (2012). Investigation of effects of ignition improvers on ignition delay time of ethanol combustion with rapid compression and expansion machine (No. 2012-01-0854). SAE Technical Paper.
Schaefer, A. J., & Hardenberg, H. O. (1981). Ignition improvers for ethanol fuels. SAE Transactions, 1107-1118.
Simonsen, H., & Chomiak, J. (1995). Testing and evaluation of ignition improvers for ethanol in a DI diesel engine. SAE transactions, 1861-1872.
Tutak, W. (2014). Bioethanol E85 as a fuel for dual fuel diesel engine. Energy Conversion and Management, 86, 39-48.
Published
2021-01-13
How to Cite
Iempremjit, K. (2021). Combustion Characteristics of Ethanol with Ignition Improver in a Small Diesel Engine during Start-up. Princess of Naradhiwas University Journal, 13(1), 226-243. Retrieved from https://li01.tci-thaijo.org/index.php/pnujr/article/view/240879
Section
บทความวิจัย