Browse > Article

The Effects of Hydrogen on DME HCCI Combustion  

Baek, Cheul-Woo (Cooperate Planning Division, Kia Motors)
Yoon, Hyeon-Sook (Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology)
Yeom, Ki-Tae (Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology)
Jang, Jin-Young (Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology)
Bae, Choong-Sik (Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.15, no.2, 2007 , pp. 15-21 More about this Journal
Abstract
The aim of this paper is controlling ignition timing and load in homogeneous charge compression ignition (HCCI) combustion with low cetane number fuel, hydrogen. Homogeneous charge compression ignition (HCCI) combustion is an advanced combustion technology that achieves higher thermal efficiency and lower $NO_x$ emissions than that of conventional combustion system. Dimethyl ether (DME), which has been researched widely as the most attractive alternative fuel of diesel, is attractive for HCCI combustion because of the easy evaporation. In this study, the single cylinder DME engine operated with a direct injection system has been used to investigate combustion processes and emissions of DME HCCI with a premixed hydrogen supply. The experiment was carried out under various engine speed and fraction rates of hydrogen. As a result, the increase of fraction rates of hydrogen retard the DME ignition timing and eliminated the knocking during high engine speed condition. IMEP was increased with increase of fraction rates of hydrogen by 30%. 40% of the fraction rates of hydrogen resulted in misfiring. The $NO_x$ emission was reduced by increasing the fraction rates of hydrogen, but HC emission was increased.
Keywords
Dimethyl ether(DME); Homogeneous charge compression ignition(HCCI); Hydrogen; Ignition timing;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 A. Hultqvist, M. Christensen, B. Johansson, A. Franke, M. Richter and M. Alden, 'A Study of the Homogeneous Charge Compression Ignition Combustion Process by Chemiluminescence Imaging,' SAE1999-01-3680, 1999
2 R. H. Thring, 'Homogeneous-Charge Compression- Ignition (HCCI) Engines,' SAE 892068, 1989
3 H. Teng, J. McCandless and J. Schneyer, 'Compression Ignition Delay (Physical+ Chemical) of Dimethyl Ether,' SAE 2003-01- 0759, 2003
4 Y. Pyo, G. Kim, Y. Lee and M. Kim, 'A Study on Performance and Exhaust Emissions of DI Diesel Engine Operated with Neat DME and DME Blended Fuel,' Transactions of KSAE, Vol.11, No.2, pp.75-82, 2003
5 S. Nam, Y. Kim and Y. Lee, 'Effect of Cooled-EGR on the Emission Characteristics of DI DME Fuelled Engine,' Spring Conference Proceedings, KSAE, pp.203-209, 2003
6 P. Yelvington and W. Green, 'Prediction of the Knock Limit and Viable Operating Range for a Homogeneous-Charge Compression-Ignition (HCCI) Engine,' SAE 2003-01-1092, 2003
7 H. Yamada, H. Sakanashi, N. Choi and A. Tezaki, 'Simplified Oxidation Mechanism of DME Applicable for Compression Ignition,' SAE 2003-01-1819, 2003
8 W. Choi, J. Lee and C. Bae, 'Combustion Characteristics of Dimethyl Ether (DME) and Diesel Fuel Using a Common-rail Fuel Injection System,' Transactions of KSAE, Vol. 12, No.6, pp.30-37, 2004
9 J. Heywood, Internal Combustion Engine Fundamentals, McGraw-Hill International Editions, 1988
10 T. Shudo, Y. Ono and T. Takahashi, 'Influence of Hydrogen and Carbon Monoxide on HCCI Combustion of Dimethyl Ether,' SAE 2002- 01-2828, 2002
11 J. Lee, S. Kook, C. Park and C. Bae, 'DME and Diesel HCCI Combustion Characteristics,' pp. 225-230, 27th KOSCO Symposium, 2003
12 H. Curran, W. Pitz, C. Westbrook, P. Dagaut, J. Boettner, M. Cathonnet, 'A Wide Range Modeling Study of Dimethyl Ether Oxidation,' 2000 International Journal of Chemical Kinetics, Vol.30, No.3, pp. 229-241, 2000
13 Y. Sato, A. Noda, T. Sakamoto and Y. Goto, 'Performance and Emission of a DI Diesel Engine Operated on Dimethyl Ether Applying EGR with Supercharging,' SAE 2000-01-1809, 2000
14 S. Kook, C. Bae and J. Kim, 'Diesel-fueled Homogeneous Charge Compression Ignition Engine with Optimized Premixing Strategies,' International Journal of Engine Research (In press).
15 U. Wagner, R. Anca, A. Velji and U. Spicher, 'An Experimental Study of Homogeneous Charge Compression Ignition (HCCI) with Various Compression Ratios, Intake Air Temperatures and Fuels with Port and Direct Fuel Injection,' SAE 2003-01-2293, 2003
16 T. Tsurushima, E. Kunishima, T. Asaumi and Y. Aoyagi, 'The Effect of Knock on Heat Loss in Homogeneous Charge Compression Ignition Engines,' SAE 2002-01-0108, 2002