Forecasting of a boosted locomotive gas diesel engine parameters with one- and two-stage charging systems
Conversion of locomotive engines for operation on natural gas lowers considerably expenses for fuel and reduces exhaust emissions which makes it possible to omit large and expensive aftertreatment systems. The permanent need to raise the engine power requires a considerable increase of the boost pressure. This can be realized by using a high pressure turbocharger or a two-stage charging system. In the research, parameters of a high boosted D200 6-cylinder locomotive engine having D/S=200/280 mm are forecasted using a one-zone model developed in MADI. An analysis was carried out to explain why the 1st stage compressor of the two-stage charging system should be specially profiled to have its map tilted to the right. Calculations were performed for the gas diesel engine having a break mean effective pressure (BMEP) 2.7 MPa with one and two-stage charging systems. In both cases, close fuel efficiency was obtained, though for the two-stage charging system, the boost air pressure was higher. The engine with one turbocharger had no reserves for further power augmentation while the two-stage charging system enabled to increase the boost air pressure further. Therefore, parameters of the engine having a higher BMEP 3.2 MPa were calculated. In that case, not to exceed the peak combustion pressure, a retarded fuel injection was used which resulted in fuel efficiency drop by approximately 1.5%.
Behr, T., Kahi, M., Reich, A., Hubacher, M. (2013). Second generation of two-stage turbocharging Power2 systems for medium speed gas and diesel Engines. Paper No. 134, CIMAC, Changhai.
Grigorov, I. N. (2018). Development of two-stage turbocharging systems for highly boosted diesel engines of various application. Ph.D. thesis, Moscow, 119.
Khatchijan, A. S., Sinyavskii, V. V., Shishlov, I. G., Karpov, D. M. (2010). Modeling of Parameters and Characteristics of Natural Gas Powered Engines. Transport Running on Alternative Fuel, 3(15), 14-19.
Luksho, V. A. (2015). A Complex Method of Increasing Energy Efficiency of Gas Engines with High Compression Ratio and Shortened Intake and Exhaust Strokes, Ph.D. thesis, Moscow, 365 p.
Matyukhin, L. M. (2015). Evaluation of results for the gas exchange processes by the use of volumetric ratios of air-fuel-residual gases-mixture. Science and Education. VIII International Research and Practice Conference, Vela-Verlag, Waldkraiburg, Munich, Germany, 337-345.
Shatrov, M. G., Dunin, A. U., Dushkin, P. V., Yakovenko, A. L., Golubkov, L. N., Sinyavski, V. V. (2020). Influence of pressure oscillations in common rail injector on fuel injection rate. FACTA UNIVERSITATIS Series: Mechanical Engineering, 18(4), 579-593. https://doi.org/10.22190/FUME200611042S
Shatrov, M. G., Sinyavskii, V. V, Perov, K. Yu, Alimov, I. V. (2015). Forecasting of Parameters of Advanced High Boosted Diesel Engine 6CN20/28 with High Pressure Turbocharge. 7th International conference: Lukaninskiye Chteniya, Moscow, Russia, 85-86.
Shatrov, Mikhail G., Sinyavski, Vladimir V., Dunin, Andrey. Yu., Shishlov, Ivan. G., Vakulenko, Andrey V. (2018). Method of conversion of high- and middle-speed diesel engines into gas diesel engines. FACTA UNIVERSITATIS, Series Mechanical Engineering, 1(10), 383-395. DOI:10.22190/FUME171004023S
Sinyavski, V. V., Alekseev I. V., Ivanov, I. Ye., Bogdanov, S. N., Trofimenko, Yu. V. (2017). Physical Simulation of High- and Medium-Speed Engines Powered by Natural Gas. Pollution Research, 36(3), 684-690.
Trapp, Ch., Klausner, J., Lang J. (2011). J624 – der weltweit erste Gasmotor mit zweistufiger Aufladung. MTZ – Motortechnische Zeitschrift Ausgabe, 04
Turbochargers TK23-TK48 http://www.propulsionplant.ru/oborudovanie/turbokompressory/turbokompressory-tipa-tk/turbokompressory-tk23-tk48.html. Accessed 28 December 2020.