Fuel and Combustion

Fuel and Combustion

Exergy Analysis of a Diesel Engine using Multi-zone Combustion Model

Authors
Somayeh Parsa 1
Rahim Khoshbakhti Saray 2
Samad Jafarmadar 2
Reza Akbarpour Ghiasi 3
Yahya Ajabshirchi 4
1 Faculty of Mechanical Engineering, Urmia University, Urmia, Iran
2 Faculty of Mechanical Engineering, Sahand University of Technology, Tabriz, Iran
3 Faculty of Mechanical Engineering, University of Tabriz, Tabriz, Iran
4 Faculty of Agricultural Machinery Engineering, University of Tabriz, Tabriz, Iran
Abstract
Availability analysis provides useful information for optimizing the systems. In the present investigation, a multi-zone combustion model is developed to simulate diesel engine cycle.Then, the governing equations of availability analysis are applied in this model.The concept of chemical equilibrium based on Olikara and Borman method is used to calculate the concentration of combustion products.Chemical availability is considered as oxidation, reduction, and diffusion availabilities.The availability analysis is applied to the engine from the inlet valve closing (IVC) until exhaust valve opening (EVO).The effect of fuel injection timing is investigated by various availability terms. The results indicate that advancing time of injection increases work and heat transfer availabilities, but decreases irreversibility.
Keywords
Availability analysis
Diesel engine
multi-zone combustion model
fuel injection timing
second law efficiency
1.     C. D.  Rakopoulos and E. G. Giakoumis, “Speed and Load Effects on the Availability Balances and Irreversibilities Production in a Multi-Cylinder Turbocharged Diesel Engin,” Applied Thermal Engineering, 17, No. 3, 1997, pp. 299-313.
2.     C. D. Rakopoulos and D. C. Kyritsis, “Comparative Second-Law Analysis of Internal Combustion Engine Operation for Methane, Methanol and Dodecane Fuels,” Energy, 26, 2001, pp.705-22.
3.     C. D. Rakopoulos and D. C. Kyritsis, “Hydrogen Enrichment Effects on the Second-Law Analysis of Natural and Landfill Gas in Engine Cylinders,” Hydrogen Energy, 31, 2006, pp. 1384-93.
4.     C. D. Rakopoulos and E. G. Giakoumis, “Second-Law Analyses Applied to Internalcombustion Engines operation,” Progress in Energy and Combustion Science, 32, 2006, pp. 2-47.
5.     A. Abassi, Sh. Khalilarya and S. Jafarmadar, “The Influence of the Inlet Charge Temperature on the Second Law Balance under the Various Operating Engine Speeds in DI Diesel Engine,” Fuel, 89, 2010, pp. 2425-2432.
6.     A. Hosseinzadeh, R. Khoshbakhti Saray and S. M. Seyed Mahmoudi, “Comparison of Thermal, Radical and Chemical Effects of EGR Gases using Availability Analysis in Dual-Fuel Engines at Part Loads,” Energy Conversion and Management, 51, 2010, pp. 2321-2329. 
7.     C. Olikara and G. Borman, “A Computer Program for Calculating Properties of Equilibrium Combustion Products with Some Applications to I.C. Engines,” SAE paper 750468, 1975.
8.     J. N. Mattavi and C. A. Amann, (Eds.), Combustion Modeling in Reciprocating Engines, Plenum Press, New York, 1980, pp. 345-368.    
9.     Z. Şahin and O. Durgun, “Multi-Zone Combustion Modeling for the Prediction of Diesel Engine Cycles and Engine Performance Parameters,” Applied Thermal Engineering, 28, 2008, pp. 2245-2256.
10.  W. S. Chiu, S. M. Shahed and W. T. Lyn, “A Transient Spray Mixing Model for Diesel Combustion,” SAE paper 760128, 1976.
11.  A. J.  Yule and L. Filipovic, “On the Break-up Times and Lengths of Diesel Sprays,” Int. j. of Heat and Fluid Flow, 13, 1992, pp. 197-206.
12.  J. B. Heywood, Internal Combustion Engine Fundamentals, McGraw Hill, New York, 1989.
13.  J. H. Mathews, Numerical Methods for Computer Science, Engineering and Mathematics, Prentice-Hall Int., London, 1987.
14.  W. J. D. Annand, “Heat Transfer in the Cylinders of Reciprocating Internal Combustion Engine,” Proc Inst Mech Eng, 177, 1963, pp. 973-80.
15.  D. Rakopoulos and G. Giakoumis, Diesel Engine Transient Operation, 1st Edition, Springer, London, 2009.
16.  V. Pirouzpanah, Y. Jeyhouni and M. Afghahi, “Reduction of Pollutants Emissions of OM-355 Diesel Engine to Euro2 by Converting Dual Fuel Engine (Diesel+Gas),” Proceeding of 1st Conference on Conversion of Automotive Fuel to CNG, 2003, pp. 84-94.