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標題: 正庚烷與甲醇雙燃料系統的 HCCI引擎探討
Investigation on HCCI Engine Operated with Dual Fuel System for Normal-heptane and Methanol
作者: 班超
Thanapiyawanit, Bancha
關鍵字: HCCI;HCCI;Double-Wiebe function;Single zone model;Double-Wiebe function;Single zone model
出版社: 機械工程學系所
引用: Boualem B., “Time frequency signal analysis and processing A comprehensive reference,” Elsevier Ltd. UK, (2003). Bowman G., Frenklach M., Gardiner B., Smith G. and Serauskas B., GRI-Mech, Gas Research Institute, USA., (9 Feb 2010). Charalambides A.G., “Homogenous Charge Compression Ignition (HCCI) Engines, Advances in Internal Combustion Engines and Fuel Technologies,” ISBN: 978-953-51-1048-4, InTech, DOI: 10.5772/55807, (2013). Chen Y.H. and Chen J.Y., “Experiment Exploration of HCCI for KYMCO 100cc Two-Stroke Gasoline Engine,” Journal of the Chinese Society of Mechanical Engineers, Vol.25, No.2, pp.165-174, (2004). Chiang C.J. and Stefanopoulou A.G., “Sensitivity Analysis of Combustion Timing and Duration of Homogeneous Charge Compression Ignition (HCCI) Engines,” Proceedings of the 2006 American Control Conference, Minneapolis, Minnesota, USA, June 14-16, pp.1857-1862, (2006). Chung J.W., Kang J.H., Kim N.H., Kang W., and Kim B.S., “Effects of the fuel injector ratio on the emission and combustion performances of the partially premixed charge compression ignition combustion engine applied with the split injection method,” International Journal of Automotive Technology , Vol. 9, No. 1, pp. 1-8, (2008). Daw, C.S., Wagner R.M., Edwards, K.D., Johney B. Green Jr. , “Understanding the transition between conventional spark-ignited combustion and HCCI in a gasoline engine;” Proceedings of the Combustion Institute, Volume 31, Issue 2, Jan 2007, pp.2887-2894, (2007). Faison I.L., “The Effect of Ozone on Diesel Soot Precursors” Mater thesis, Faculty of the Virginia Polytechnic Institute and State University, (1997). Ganesh D., Nagarajan G., and Mohamed Ibrahim M., “Study of performance, combustion and emission characteristics of diesel homogeneous charge compression ignition (HCCI) combustion with external mixture formation,” Fuel 87, pp.3497-3503, (2008). Hosseini, V., Stuart Neill W., Guo H.S., Dumitrescu C.E., Chippior W.L., “Influence of cetane number, 90% distillation temperature and aromatic content on HCCI combustion,” Proceedings of Combustion Institute- Canadian section spring technical meeting, Carleton university, Ottawa May 9-12, (2010). Junjun M., Xingcai L., Libin J., and Zhen H., An experimental study of HCCI-DI combustion and emissions in a diesel engine with dual fuel. International Journal of Thermal Sciences 47, pp.1235-1242, (2008). Lanzafame R. and Messina M., “ICE Gross Heat Release Strongly Influenced by Specific Heat Ratio Values,” International Journal of Automotive Technology, Vol. 4, No. 3, pp.125-133, (2003). Lu X.C., Ji L.B., Ma Junjun, and Huang Z., “Experimental study on the cycle-by-cycle variations of homogeneous charge compression ignition combustion using primary reference fuels and their mixtures”, Proceedings of the Institution of Mechanical Engineers, part D, journal of automobile engineering 2007, Vol. 221, pp. 859-866, (2007). Lu X.C., Hou Y.C., Zu L.L., and Huang Z., “Experimental study on the auto-ignition and combustion characteristics in the homoge-neous charge compression ignition (HCCI) combustion operation with ethanol/n-heptane blend fuels by port injection,” Fuel, Vol. 85, Issues 17-18, Dec 2006, pp.2622-2631, (2006). Machrafib H., Lombaertb K., Cavadiasa S., Guibertb P., Amourouxa J., “Reduced chemical reaction mechanisms: experimental and HCCImodelling investigations of autoignition processes of iso-octane in internal combustion engines”, Fuel 84, pp.2330–2340, (2005). Maroteaux F. and Noel L., “Development of a reduced n-heptane oxidation mechanism for HCCI combustion modeling, Combustion and Flame 146, pp.246-267, (2006). Megaritis A., Yap D. and Wyszynski M. L., “Effect of water blending on bioethanol HCCI combustion with forced induction and residual gas trapping,” Energy, 32, pp.2396-2400, (2006). Michael P., and Anthony M., “Engine Testing Theory and Practice,” Butterworth-Heinemann, (1997). Ming J. and Xing M.Z., “A chemical kinetics model of iso-octane oxidation for HCCI engines”, Fuel 85, pp.2593-2604, (2006). Ming J. and Xing M.Z., “Numerical simulation of Homogeneous charge compression ignition combustion using a multi-dimensional model”, JAUTO263 c IMechE 2007, Proc. IMechE Vol. 221 Part D: J. Automobile Engineering., (2007). NWAFOR O M I, “Knock characteristics of dual-fuel combustion in diesel engines using natural gas as primary fuel,” Sadhana Vol. 27, Part 3, pp.375–382, June (2002). Moran M.J. and Shapiro H.N., Fundamental Engineering of Thermodynamics. 5th edition. John Wiley & Sons, Inc. USA. Quintero H.F., Romero C.A., and Vanegas U.L.V. “Thermodynamic and dynamic analysis of an internal combustion engine with a noncircular-gear based modified crank-slider mechanism,” 12th IFToMM World Congress, Besancon (France), June 18-21, (2007). Ramos J.I., “Internal combustion engine modeling,” Hemisphere publishing corporation, U.S.A., (1989). Shaver G.M., Roelle M.J., and Gerdes J.C., “Modeling cycle-to-cycle dynamics and mode transition in HCCI engines with variable valve actuation,” Control Engineering Practice 14, pp.213-222, (2006). Shigeyuki Tanaka, Ferran Ayala, James C. Keck., “A reduced chemical kinetic model for HCCI combustion of primary reference fuels in a rapid compression machine”, Combustion and Flame 133, pp.467–481, (2003). Sjoberg M, and Dec J.E., “Comparing late-cycle autoignition stability for single- and two-stage ignition fuels in HCCI engines,” Proceedings of the combustion institute 31, pp.2895-2902, (2006). Soyhan H.S., Yasar H., Walmsley H., Head B., Kalghatgi G.T. and Sorusbay C., “Evaluation of heat transfer correlations for HCCI engine modeling,” Applied Thermal Engineering 29 pp.541–549, (2009). Soylu S., “Examination of combustion characteristics and phasing strategies of a natural gas HCCI engine,” Energy conversion and management, 46, pp.101-119, (2005). Sun F., Chen C., Ting D.S.K., and Sobiesiak A. “Modeling operation of HCCI Engines Fueled with Ethanol,” 2005 American Control Conference, Portland, OR, USA, June 8-10, (2005). Turn S.R., “An Introduction to Combustion: Concepts and Applications,” 2nd edition, McGRAW-HILL companies, Inc., international editions, Singapore, (2000). Yap D., Karlovsky J., Megaritis A., Wyszynski M.L., and Xu H., “An investigation into propane homogeneous charge compression ignition (HCCI) engine operation with residual gas trapping,” Fuel 84, pp.2372–2379, (2005). Wen Z., Maozhao X., and Ming J., “Numerical investigation on the application of catalytic combustion to HCCI engines,” Chemical Engineering Journal 127 (2007) pp.81–93, (2007). Yamada H., Masataka Y., and Atsumu T., “Chemical mechanistic analysis of additive effects in homogeneous charge compression ignition of dimethyl ether,” Proceedings of the Com- bustion Institute 30, pp.2773–2780, (2005) Yasar H., Soyhan H.S., Walmsley H., Head, B., and Sorusbay, B., “Double-Wiebe function: An approach for single-zone HCCI engine modeling,” Applied Thermal Engineering 28, pp.1284–1290, (2008).
HCCI (Homogenous charge compression ignition) engines have a potential to raise the efficiency of reciprocating engines during partial load operation. However, the performance of the HCCI engine at high loads is restricted by severe knocking. It is observed by the excessive pressure rise rate. This is due to the rapid combustion process occurring inside the cylinder, which does not follow the flame propagation that is seen in conventional engines. In this study, a low compression ratio of 9.5:1 gasoline engine was converted to operate in HCCI mode with the goal being to expand the stable operating region at high loads. Initially, pure n-heptane was used as the fuel and could be run steadily at equivalence ratios of 0.30 to 0.50 with elevated intake charge temperatures between 150oC and 90oC, respectively. The n-heptane HCCI engine could reach a highest performance at an IMEP (indicated mean effective pressure) of 0.38 MPa, which was greater than the performance found in the literature.
To reach an even higher performance, a dual-fuel system was exploited. Iso-octane, methanol, and hydrous methanol as an anti-detonation additive, was introduced into the intake stream using an injection strategy in this study. A dual fuel system between n-heptane and iso-octane could expand operating load of the HCCI engine from equivalent ratio of 0.30 to 0.60 or IMEP of 0.38 to 0.42 MPa without compensation for thermal efficiency and emissions. Required intake charge temperature range could be reduced from 75˚C to 25˚C-width, which is helpful for control issue to regulate a desired temperature for a particular load operation.
Another dual fuel system employed was n-heptane and methanol. The maximum IMEP is comparable with the previous case. Indicated thermal efficiency among the operating maintained at about 34% because combustion timing among operating range were identical intentionally for ease comparison. Introduction of 90% and 95% (vol/vol) hydrous methanol showed a similar trend but a lower thermal conversion efficiency and IMEP value. Therefore, to gain extra load by injection of secondary fuel could achieve and maintain high thermal conversion efficiency across a wide load. It enhances a 10.5% larger load compared to a pure n-heptane-fuelled HCCI engine.
The hydrocarbon (HC) and carbon monoxide (CO) emissions were lower than 800 ppm and 0.10%, respectively for all the conditions tested in this study. They were less at high loads because of higher fuel concentration. The nitrogen oxides (NOx) emissions were below 12 ppm and were found to increase sharply at higher loads to a maximum of 23 ppm.
In parallel, a single zone model to predict the temperature and the pressure histories in an HCCI engine is developed. Combustion phase was described by double-Wiebe function. The single zone model coupled with an double-Wiebe function were performed to simulate pressure and temperature between the period of IVC (Inlet valve close) and EVO (Exhaust valve open).
A reduced kinetic detail mechanism of n-heptane and methanol was also used to construct the single zone combustion model. The phenomenon of two-stage combustion in an HCCI combustion mode was simulated. The n-heptane mechanisms presented by Tanaka and Donovan and methanol mechanisms obtained from GRI-Mech (, 29 June 2013) were implemented in the model to evaluate their performance in comparison to experimental data. The initiation of the first stage of combustion and the time duration between the first and second stage of combustion were validated by adjusting the heat transfer coefficients. The modified model correctly predicted trends in combustion, including the required intake charge temperature and the onset of two-stage combustion. However, the peak combustion pressures were overestimated by approximately 11%. This overestimation was due to certain effects that were not considered in the model, including inhomogeneities in the mixture and leakage in the piston ring.
其他識別: U0005-2408201320374000
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