Investigation on Effects of Water Addition on Performance and Emissions of an n-heptane Fueled Homogeneous Charge Compression Ignition Engine

Document Type : Research Article

Authors

1 student

2 صنعتی سهند-مهندسی مکانیک

Abstract

The main purpose of current study is investigation on the effect of water addition on n-heptane homogenous charge compression ignition combustion. A multi zone model coupled to the semi-detailed chemical kinetics mechanism is used for simulation of n-heptane homogenous charge compression ignition combustion. First, the accuracy of the model was estimated for two different operating modes, and then seven different amounts of water were added to the fuel and its effects on n-heptane combustion were investigated. Thermal, chemical and dilution effects of water are studied using artificial inert species method. The results show that the start of combustion was retarded by water addition due to the thermal effect of water. Peak values of in-cylinder pressure and heat release rate decreases by water addition. Water addition has caused the maximum amount of radicals in the combustion chamber to be reduced and the time of their formation is delayed. Water addition increases the amount of unburned hydrocarbons at exhaust. Thermal effect of water on start of combustion and emissions formation is more significant than its dilution and chemical effects. Using small quantities of water will increase the thermal efficiency of the engine and reduce emissions from it.

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[1] F. Agrell, H.-E. Ångström, B. Eriksson, J. Wikander, J. Linderyd, Control of HCCI During Engine Transients by Aid of Variable Valve Timings Through the Use of Model Based Non-Linear Compensation, in, SAE International, 2005.
[2] F. Zhao, D.N. Assanis, T.N. Asmus, J.E. Dec, J.A. Eng, P.M. Najt, Homogeneous Charge Compression Ignition (HCCI) Engines, SAE, USA, 2003.
[3] E. Neshat, R.K. Saray, S. Parsa, Numerical analysis of the effects of reformer gas on supercharged n-heptane HCCI combustion, Fuel, 200 (2017) 488-498.
[4] A. Amjad, R.K. Saray, S. Mahmoudi, A. Rahimi, Availability analysis of n-heptane and natural gas blends combustion in HCCI engines, Energy, 36(12) (2011) 6900-6909.
[5] A. Megaritis, D. Yap, M.L. Wyszynski, Effect of water blending on bioethanol HCCI combustion with forced induction and residual gas trapping, Energy, 32(12) (2007) 2396-2400.
[6] P. Das, P. Subbarao, J. Subrahmanyam, Control of combustion process in an HCCI-DI combustion engine using dual injection strategy with EGR, Fuel, 159 (2015) 580-589.
[7] H. Guo, W.S. Neill, The effect of hydrogen addition on combustion and emission characteristics of an n-heptane fuelled HCCI engine, International Journal of Hydrogen Energy, 38 (2013) 11429-11437.
[8] S. Voshtani, M. Reyhanian, M. Ehteram, V. Hosseini, Investigating various effects of reformer gas enrichment on a natural gas-fueled HCCI combustion engine, International Journal of Hydrogen Energy, 39 (2014) 19799-19809.
[9] Y. Iwashiro, T. Tsurushima, Y. Nishijima, Y. Asaumi, Y. Aoyagi, Fuel consumption improvement and operation range expansion in HCCI by direct water injection, 0148-7191, SAE Technical Paper, 2002.
[10] M. Christensen, B. Johansson, Homogeneous Charge Compression Ignition with Water Injection, in, SAE International, 1999.
[11] J.H. Mack, S.M. Aceves, R.W. Dibble, Demonstrating direct use of wet ethanol in a homogeneous charge compression ignition (HCCI) engine, Energy, 34(6) (2009) 782-787.
[12] A. Megaritis, D. Yap, M.L. Wyszynski, Effect of inlet valve timing and water blending on bioethanol HCCI combustion using forced induction and residual gas trapping, Fuel, 87(6) (2008) 732-739.
[13] T. Steinhilber, T. Sattelmayer, The effect of water addition on HCCI diesel combustion, 0148-7191, SAE Technical Paper, 2006.
[14] D.L. Flowers, S.M. Aceves, J.M. Frias, Improving Ethanol Life Cycle Energy Efficiency by Direct Utilization of Wet Ethanol in HCCI Engines, in, SAE International, 2007.
[15] S. Saxena, S. Schneider, S. Aceves, R. Dibble, Wet ethanol in HCCI engines with exhaust heat recovery to improve the energy balance of ethanol fuels, Applied energy, 98 (2012) 448-457.
[16] N. Vinayagam, G. Nagarajan, Experimental study of performance and emission characteristics of DEE-assisted minimally processed ethanol fuelled HCCI engine, International Journal of Automotive Technology, 15(4) (2014) 517-523.
[17] J. Cowart, K. Bowes, M. Walker, L. Hamilton, D.L. Prak, Homogenous Charge Compression Ignition (HCCI) Operation With Jet Fuel and Water Injection in a Single Cylinder Diesel CFR Engine, in:  ASME 2017 Internal Combustion Engine Division Fall Technical Conference, American Society of Mechanical Engineers, 2017, pp. V001T003A016-V001T003A016.
[18] J. Valero-Marco, B. Lehrheuer, J.J. López, S. Pischinger, Potential of water direct injection in a CAI/HCCI gasoline engine to extend the operating range towards higher loads, Fuel, 231 (2018) 317-327.
[19] M. Wick, J. Bedei, D. Gordon, C. Wouters, B. Lehrheuer, E. Nuss, J. Andert, C.R. Koch, In-cycle control for stabilization of homogeneous charge compression ignition combustion using direct water injection, Applied energy,  (2019).
[20] M.F. Ahari, E. Neshat, Advanced analysis of various effects of water on natural gas HCCI combustion, emissions and chemical procedure using artificial inert species, Energy, 171 (2019) 842-852.
[21] P. Hellier, N. Ladommatos, R. Allan, J. Rogerson, Combustion and emissions characteristics of toluene/n-heptane and 1-octene/n-octane binary mixtures in a direct injection compression ignition engine, Combustion and Flame, 160(10) (2013) 2141-2158.
[22] V.R. Katta, S.K. Aggarwal, W.M. Roquemore, Evaluation of chemical-kinetics models for n-heptane combustion using a multidimensional CFD code, fuel, 93 (2012) 339-350.
[23] R. Lindstedt, L. Maurice, Detailed kinetic modelling of n-heptane combustion, Combustion Science and Technology, 107(4-6) (1995) 317-353.
[24] Z. Zheng, M. Yao, Numerical study on the chemical reaction kinetics of n-heptane for HCCI combustion process, fuel, 85(17-18) (2006) 2605-2615.
[25] E.J. Silke, H.J. Curran, J.M. Simmie, The influence of fuel structure on combustion as demonstrated by the isomers of heptane: a rapid compression machine study, Proceedings of the Combustion Institute, 30(2) (2005) 2639-2647.
[26] F. Maroteaux, L. Noel, Development of a reduced n-heptane oxidation mechanism for HCCI combustion modeling, Combustion and Flame, 146(1-2) (2006) 246-267.
[27] M.M. Hasan, M.M. Rahman, K. Kadirgama, D. Ramasamy, Numerical study of engine parameters on combustion and performance characteristics in an n-heptane fueled HCCI engine, Applied Thermal Engineering, 128 (2018) 1464-1475.
[28] V. Hosseini, M.D. Checkel, Reformer gas composition effect on HCCI combustion of n-heptane, iso-octane, and natural gas, 0148-7191, SAE Technical Paper, 2008.
[29] V. Hosseini, M.D. Checkel, Effect of reformer gas on HCCI combustion-Part I: High Octane Fuels, 0148-7191, SAE Technical Paper, 2007.
[30] V. Hosseini, Reformer Gas Application in HCCI Combustion Engine, University of Alberta, Edmonton, Alberta, 2008.
[31] E. Neshat, R.K. Saray, Development of a new multi zone model for prediction of HCCI (homogenous charge compression ignition) engine combustion, performance and emission characteristics, Energy, 73 (2014) 325-339.
[32] E. Neshat, R.K. Saray, Effect of different heat transfer models on HCCI engine simulation, Energy Conversion and Management, 88 (2014) 1-14.
[33] J.B. Heywood, Internal combustion engine fundamentals, McGraw Hill Inc, Singapore, 1998.
[34] V. Golovitchev, Chalmers Univ of Tech, Gothenburg, Sweden, http://www.tfd.chalmers.se/~valeri/MECH.html.
[35] E. Neshat, M. Nazemian, D. Honnery, Thermodynamic modeling and validation of in‐cylinder flow in diesel engines, Environmental Progress & Sustainable Energy,  (2019).
[36] E. Neshat, A.V. Bajestani, D. Honnery, Advanced numerical analyses on thermal, chemical and dilution effects of water addition on diesel engine performance and emissions utilizing artificial inert species, fuel, 242 (2019) 596-606.
[37] E. Neshat, R.K. Saray, V. Hosseini, Effect of reformer gas blending on homogeneous charge compression ignition combustion of primary reference fuels using multi zone model and semi detailed chemical-kinetic mechanism, Applied Energy, 179 (2016) 463–478.
[38] M. Reyhanian, V. Hosseini, Various effects of reformer gas enrichment on natural-gas, iso-octane and normal-heptane HCCI combustion using artificial inert species method, Energy Conversion and Management, 159 (2018) 7-19.
[39] C. Fang, M. Ouyang, F. Yang, Real-time start of combustion detection based on cylinder pressure signals for compression ignition engines, Applied thermal engineering, 114 (2017) 264-270.
[40] D.A. Rothamer, L. Murphy, Systematic study of ignition delay for jet fuels and diesel fuel in a heavy-duty diesel engine, Proceedings of the Combustion Institute, 34(2) (2013) 3021-3029.
[41] A. Hariyanto, K. Bagiasna, I. Asharimurti, A.O. Wijaya, I.K. Reksowardoyo, W. Arismunandar, Application of wavelet analysis to determine the start of combustion of diesel engines, 0148-7191, SAE Technical Paper, 2007.
[42] T. Kamimoto, T. Minagawa, S. Kobori, A two-zone model analysis of heat release rate in diesel engines, 0148-7191, SAE Technical Paper, 1997.
[43] B. Johansson, C. Wilhelmsson, P. Tunestål, R. Johansson, A. Widd, A Physical Two-Zone NOx Model Intended for Embedded Implementation, in:  SAE World Congress, 2009, SAE, 2009.
[44] H. Yun, M. Sellnau, N. Milovanovic, S. Zuelch, Development of premixed low-temperature diesel combustion in a HSDI diesel engine, 0148-7191, SAE Technical Paper, 2008.
[45] M.B. Young, Cyclic dispersion–some quantitative cause-and-effect relationships, 0148-7191, SAE Technical Paper, 1980.