A Study of the Influence of the Intercooled Turbocharger and Cooled EGR on the Performance Parameters of an Ethanol-fueled Engine

Yıl 2019, , 149 - 157, 01.09.2019

Ana Paula Mattos , Waldyr Luiz Ribeiro Gallo

https://doi.org/10.5541/ijot.499892

Cited By: 1

Öz

The hydrous ethanol combined with the
turbocharged engine with exhaust gas recirculation (EGR) has been investigated
with a phenomenological simulation model. This paper analyzes the influence of
the low pressure and high pressure cooled EGR, the intercooler and the amount
of recirculated gases, as they affect the performance parameters in a spark-ignited
ethanol-fueled engine. Using a phenomenological model developed in Matlab®, the
behavior of the pressure and temperature curves is analyzed considering the
variation of the crank angle, the formation of NOx, and the tendency for
knocking. The fuel analyzed is hydrous ethanol (E95h - 5%water by volume),
which is widely used in Brazil. The
proposed technique showed an increased power using the intercooler (IC) while
avoiding knocking. This study showed that the use of a cooled EGR and turbocharged
SI results in increased power, while also
reducing NOx formation, and preventing or reducing engine knocking. In some engines, the low pressure cooled EGR is better
than high pressure, but this can be different for another engine. The model helps to find the best or more adequately equipped for each model
of engine.

Anahtar Kelimeler

Cooled EGR, Turbocharger, Hydrous Ethanol, Phenomenogical model of Spark Engine

Kaynakça

• Reference 1 [1] C. Park, Y. Choi, C. Kim, S. Oh, G. Lim, and Y. Moriyoshi, “Performance and exhaust emission characteristics of a spark ignition engine using ethanol and ethanol-reformed gas,” Fuel, vol. 89, no. 8, pp. 2118–2125, 2010.Reference 2[2] A. Boretti, “Analysis of desing of pure ethanol engines,” SAE 2010-01-1453, pp. 1–13, 2010.Reference 3[3] L. Bromberg and D. R. Cohn, “Effective Octane and Efficiency advantages of direct injection alcohol engines,” LFEE 2008-01, 2008.Reference 4 [4] S. M. Sarathy, P. Oßwald, N. Hansen, and K. Kohse-Höinghaus, “Alcohol combustion chemistry,” Prog. Energy Combust. Sci., vol. 44, pp. 40–102, Oct. 2014.Reference 5 [5] C. Cuevas, D. Makaire, and P. Ngendakumana, “Thermo-hydraulic characterization of an automotive intercooler for a low pressure EGR application,” Appl. Therm. Eng., vol. 31, no. 14–15, pp. 2474–2484, 2011.Reference 6[6] A. K. Agrawal, S. K. Singh, S. Sinha, and M. K. Shukla, Effect of EGR on the Exhaust Gas Temperature and Exhaust Opacity in Compression Ignition Engines Using Jatropha Oil as Fuel, Parte 3., vol. 29. India: Springer, 2004.Reference 7[7] N. Ghassembaglou and L. Torkaman, “Efficient design of exhaust gas cooler in cold EGR equipped dies el engine,” Alexandria Eng. J., vol. 55, no. 2, pp. 769–778, 2016.Reference 8[8] L. Chen, T. Li, T. Yin, and B. Zheng, “A predictive model for knock onset in spark-ignition engines with cooled EGR,” Energy Convers. Manag., vol. 87, pp. 946–955, 2014.Reference 9[9] L. Bromberg, D. R. Cohn, and J. B. Heywood, “Calculations of knock suppression in highly turbocharged gasoline/ethanol engines using direct ethanol injection,” Lfee, pp. 1–17, 2006.Reference 10[10] L. Chen, P. Sun, S. Ding, and S. Yang, “Miscibility of ternary systems containing kerosene-based surrogate fuel and hydrous ethanol: Experimental data+thermodynamic modeling,” Fluid Phase Equilibria, vol. 379, Elsevier B.V., pp. 1–9, Oct-2014.Reference 11[11] T. Alger, “Cooled exhaust-gas recirculation for fuel economy and emissions improvement in gasoline engines,” Int. J. Engine Res., vol. 12, no. 3, pp. 252–264, 2011.Reference 12[12] J. Park, S. Song, and K. S. Lee, “Numerical investigation of a dual-loop EGR split strategy using a split index and multi-objective Pareto optimization,” Appl. Energy, vol. 142, pp. 21–32, 2015.Reference 13[13] Y. Jamal, T. Wagner, and M. L. Wyszynski, “Exhaust gas reforming of gasoline at moderate temperatures,” International Journal of Hydrogen Energy, vol. 21, no. 6, pp. 507–519, 1996.Reference 14[14] W. W. Pulkrabek, Engineering Fundamentals of the Internal Combustion Engine, 2 nd., vol. 2. New Jersey: Prentice Hall, 1997.Reference 15[15] P. Moulin, J. Chauvin, and B. Youssef, “Modelling and control of the air system of a turbocharged gasoline engine,” in The internation Federation of Automatic Control, 2008.Reference 16[16] A. J. T. B. DE LIMA, “Pollutant Formation Simulation Models ( CO , NOx and UHC ) for Ethanol-fueled Engines,” Universidade Estadual de Campinas, 2017.Reference 17[17] F. R. D. S. JÚNIOR, “Estudo de um modelo computacional para prever a ocorrência da detonação em um motor avançado a etanol,” Univeridade Estadual de Campinas, 2017.Reference 18[18] M. W. Chase, J. R. Davies, J. Downey, D. J. Frurip, R. A. McDonald, and A. N. Syverud, JANAF thermochemical Tables, 3rd ed. US & Canada: American chemical society and the American Institute of Physisics for National Bureau of Standards, 1985.Reference 19[19] A. Y. Cengel, Transfereência de calor e massa. Uma abordagem prática., 3rd ed. São Paulo: McGraw-