EFFECTS OF PARTIAL RCCI APPLICATION OF LPG ON PERFORMANCE, COMBUSTION AND EXHAUST EMISSIONS IN A DIESEL ENGINE POWERED GENERATOR

In this study, engine performance, combustion and emissions a diesel engine used for driving an electrical generator was investigated with LPG fumigation into the manifold of the engine as secondary fuel. Tests were carried out in 4 cylinders, 4 strokes water-cooled and direct-injection diesel engine generator. According to the test results; cylinder pressure, average gas temperature and peak values of heat release rate were increased as amount of LPG was increased. However, brake specific fuel consumption and mass fuel consumption were higher. Generally, with LPG addition, CO and HC emissions were found higher. Up to 40% LPG addition, CO2 emissions were lowered and over 40% LPG addition, CO2 emission increased. With increasing LPG ratio, there was a decrease in NOx emission values. On the other hand, generally, as LPG content was increased, O2 emissions were decreased significantly. Generally, the usage of LPG until certain levels found to be possible as secondary fuel in diesel engines. However, its usage in the engine up to certain levels resulted in considerable negative changes in performance, combustion and emissions changes. Over 55% LPG fumigation resulted in quite high flame velocity and propagation which eventually resulted in the accelerated pressure increase for per crank angle. This condition may be accepted as the starting of the knock. Therefore, only certain low amounts of LPG usage as secondary nonreactive fuel in diesel engine were found to be possible.

Keywords:

: Diesel engine, Dual-Fuel system, Emission LPG, Performance,

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[1] Ögüt, H., and R. Kus. (1999). Alternative fuel usage in motor vehicles, II. Transportation and traffic congress report book, TMMOB, Mechanical Engineering Publishing. 149-162.
[2] Sertcelik, N. Effects of using LPG in dual fuel diesel engine on performance and emission, Master's thesis, Gazi university, Ankara, TR, 2010.
[3] Gümüş, M. (2009). The effect of LPG using ratio on performance and emission characteristics in a spark ignition engine with dual fuel injection, The Journal Of The Engineering And Architecture Faculty Of Gazi University, Vol. 24, No. 2, 265-273.
[4] Aktaş, A., and O. Doğan. (2010). Effect of LPG percentage to performance and exhaust emissions in a dual fuel engine, The Journal Of The Engineering And Architecture Faculty Of Gazi University,Vol. 25, No. 1, 171-178.
[5] Yiğit, A.The usage of LPG in a diesel engine and the observation of the effects of different kinds of pilot diesel fuel on the performance of the engine and emission, Master's thesis, Karabuk university, Karabuk, Tr, 2008.
[6] Saleh, H.E. 2008. Effect of variation in LPG composition on emissions and performance in dual fuel diesel engine, Fuel, Vol. 87, No. (13-14), 3031–3039. doi:10.1016/j.fuel.2008.04.007.
[7] Aydin, F., and M. Acaroğlu, (2009). Investigation of vehicle performance and exhaust in sequential gas phase LPG injection system, 10. Combustion Symposium.
[8] Alla, G.A., H. Soliman, and O. Badr, M.A. Rabbo, (2000). Effect of pilot fuel quantity on the performance of a dual fuel engine, Energy Conversion and Management, Vol. 41, No. 6, 559-572. doi:10.1016/S0196-8904(99)00124-7.
[9] Çarman, K., S. Salman, and M. Ciniviz. (2001). Effects on performance and emissions using diesel fuel and LPG on the diesel engines, Technical Online Journal Faculty Of Selçuk University, Vol. 2, No. 1, Issn, 1302-6178
[10] Jothi, N.M., G. Nagarajan, and S. Renganarayanan. (2007). Experimental studies on homogeneous charge CI engine fueled with LPG using DEE as an ignition enhancer, Renewable Energy, Vol. 32, No. 9, 1581–1593. doi:/10.1016/j.renene.2006.08.007.
[11] Qi, D., Y. Bian, Z. Ma, C. Zhang, and S. Liu. (2007). Combustion and exhaust emission characteristics of a compression ignition engine using liquefied petroleum gas–Diesel blended fuel, Energy Conversion and Management, Vol. 48, No. 2, 500–509. doi:/10.1016/j.enconman.2006.06.013.
[12] Borat, O., M.A. Balcı, and A. Sürmen. 1994. Internal Combustion Engines, G.U. Technical Education Foundation Publications-2.
[13] LPG System. Accessed November 20, 2017. http://www.ipragaz.co/brosurler/dokmegaz/araci-firma-segmantasyon-katologu.pdf
[14] Koca, D. Ö.The experimental investigation of the diesel and LPG fuels together diesel engine, Master's thesis, Yildiz technical university, İstanbul, TR, 2013.
[15] Ciniviz, M. Effect on performance and emission of using diesel fuel and LPG on diesel engines, Master's thesis, Selcuk university institute of science and technology, Konya, TR, 2001.

ISSN: 2536-5010
Yayın Aralığı: Yılda 2 Sayı
Yayıncı: INESEG Yayıncılık A.Ş.

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