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http://dx.doi.org/10.5762/KAIS.2017.18.5.700

A Study on the Performance and Combustion Characteristics with CNG Substitution Rate in a Diesel Engine  

Jang, Hyeong-Jun (Dept. of Mechanical Engineering, Graduate School, Gachon Univ.)
Lee, Sun-Youp (Korea Institute of Machinery and Materials, KIMM)
Kim, Chang-Gi (Korea Institute of Machinery and Materials, KIMM)
Cho, Jeong-Kwon (Transportation Safety Specialist, TS)
Lim, Jong-Han (Dept. of Mechanical Engineering, Gachon Univ.)
Yoon, Jun-Kyu (Dept. of Mechanical Engineering, Gachon Univ.)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.18, no.5, 2017 , pp. 700-707 More about this Journal
Abstract
In the international natural gas market, natural gas has markedly low calories. The domestic calories standard of natural gas was changed and the performance and efficiency of many industrial machines using natural gas were affected because of low caloric natural gas. Therefore, in this study, a dual fuel engine fueled with natural gas and diesel was tested to examine the effects of the CNG substitution rate on the combustion characteristics, such as thermal efficiency, COVimep and heat release rate. The CNG substitution rate was defined as the ratio of CNG instead of diesel, which was calculated as the total energy. The conditions of the tested engine were fixed $1800rpm/500N{\cdot}m$. In addition, diesel fuel was injected at $16^{\circ}CA$ BTDC and the fuel pressure was fixed at 85 MPa; the lower heating value of CNG was $10,400kcal/Nm^3$. The results of the engine test showed that the amount of diesel fuel was changed according to the CNG substitution rate. Therefore, when the substitution rate was increased, the amount of diesel fuel was decreased, which affected the energy for ignition. In addition, the ignition delay duration was increased, which affected the thermal efficiency and torque. On the other hand, the COVimep was less than 5% and a stable combustion state of the engine was shown.
Keywords
CNG Substitution Rate; Combustion Characteristics; COVimep; Dual Fuel Engine; Thermal Efficiency;
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Times Cited By KSCI : 6  (Citation Analysis)
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1 D. S. Oh, J. W. Sung, S. J. Lee, "The application and development of the evaluation indicators in accordance with the planning stages of low-carbon city", Journal of the Korean Academia-Industrial cooperation Society, Vol. 14. No. 9, pp. 4560-4571, 2013. DOI: http://doi.org/10.5762/KAIS.2013.14.9.4560   DOI
2 Y. R. Kim, H. J. Jang, C. G. Kim, "Effects of CNG heating value on combustion characteristics of a diesel-CNG dual-fuel engine," KIGAS, Vol. 19, No. 6, pp. 28-33, 2015. DOI: http://doi.org/10.7842/kigas.2015.19.6.28   DOI
3 H. J. Jang, J. K Yoon, S. Y. Lee, Y. R. Kim, J. H. Kim and C. G. Kim, "Effect of CNG heating value variations on emissions characteristics in a diesel-CNG dual-fuel engine", KIGAS, Vol. 21, No. 6, pp. 43-49, 2016. DOI: https://doi.org/10.7842/kigas.2016.20.6.43   DOI
4 C. W. Park, S. H. Park, Y. G. Lee, C. G. Kim, S. Y. Lee and Y. Moriyoshi, "Performance and emission characteristics of a SI engine fueled by low calorific bio gas blended with hydrogen", International Journal of Hydrogen Energy, Vol. 36, No. 16, pp. 10080-10088, 2011. DOI: https://doi.org/10.1016/j.ijhydene.2011.05.018   DOI
5 B. J. Jun, M. H. Park, "An experimental study on engine performance of LPG/gasoline bi-fuel", Journal of the Korean Academia -Industrial cooperation Society, Vol. 10, No. 7, pp. 1433-1438, 2009.   DOI
6 Wagemakers A. M. L. M, Leermakers C. A. J, "Review on the effects of dual-fuel operation, using diesel and gaseous fuels, on emissions and performance", SAE, 2012-01-0869, 2012. DOI: http://doi.org/10.4271/2012-01-0869   DOI
7 O. T. Lim, "Study on performance and emission characteristics of CNG/diesel dual-fuel engine", KSME, Vol. 35, No. 9, pp. 869-874, 2011. DOI: https://doi.org/10.3795/ksme-b.2011.35.9.869   DOI
8 H. T. Kim, J. G. Park, Y. J. Kim, "Technology development trend of shale gas and oil", Journal of the KSME, Vol. 54, No. 11, pp. 46-51, 2014.
9 G. H. Choi, O. T. Lim, "The Engine Performance and emission characteristics of CNG/Diesel dual-fuel engine by CNG mixing ratio," KSAE, Vol. 19, No. 3, pp 38-43, 2011.
10 C. Schwarz, E. Schunemann, B. Durst, J. Fischer, A. Witt, "Potentials of the spray-guided BMW DI Combustion System", SAE, 2008-01-1285, 2008. DOI: http://doi.org/10.4271/2006-01-1265   DOI