TY - JOUR
T1 - Engine performance and emissions of a diesel engine operating on diesel-RME (rapeseed methyl ester) blends with EGR (exhaust gas recirculation)
AU - Tsolakis, Athanasios
AU - Megaritis, A
AU - Wyszynski, Miroslaw
AU - Theinnoi, Kampanart
PY - 2007/1/1
Y1 - 2007/1/1
N2 - The effects of biodiesel (rapeseed methyl ester, RME) and different diesel/RME blends on the diesel engine NO, emissions, smoke, fuel consumption, engine efficiency, cylinder pressure and net heat release rate are analysed and presented. The combustion of RME as pure fuel or blended with diesel in an unmodified engine results in advanced combustion, reduced ignition delay and increased heat release rate in the initial uncontrolled premixed combustion phase. The increased in-cylinder pressure and temperature lead to increased NO, emissions while the more advanced combustion assists in the reduction of smoke compared to pure diesel combustion. The lower calorific value of RME results in increased fuel consumption but the engine thermal efficiency is not affected significantly. When similar percentages (% by volume) of exhaust gas recirculation (EGR) are used in the cases of diesel and RME, NO, emissions are reduced to similar values, but the smoke emissions are significantly lower in the case of RME. The retardation of the injection timing in the case of pure RME and 50/50 (by volume) blend with diesel results in further reduction of NO., at a cost of small increases of smoke and fuel consumption. (C) 2007 Elsevier Ltd. All rights reserved.
AB - The effects of biodiesel (rapeseed methyl ester, RME) and different diesel/RME blends on the diesel engine NO, emissions, smoke, fuel consumption, engine efficiency, cylinder pressure and net heat release rate are analysed and presented. The combustion of RME as pure fuel or blended with diesel in an unmodified engine results in advanced combustion, reduced ignition delay and increased heat release rate in the initial uncontrolled premixed combustion phase. The increased in-cylinder pressure and temperature lead to increased NO, emissions while the more advanced combustion assists in the reduction of smoke compared to pure diesel combustion. The lower calorific value of RME results in increased fuel consumption but the engine thermal efficiency is not affected significantly. When similar percentages (% by volume) of exhaust gas recirculation (EGR) are used in the cases of diesel and RME, NO, emissions are reduced to similar values, but the smoke emissions are significantly lower in the case of RME. The retardation of the injection timing in the case of pure RME and 50/50 (by volume) blend with diesel results in further reduction of NO., at a cost of small increases of smoke and fuel consumption. (C) 2007 Elsevier Ltd. All rights reserved.
KW - emissions
KW - biodiesel
KW - retarded injection
KW - combustion EGR
U2 - 10.1016/j.energy.2007.05.016
DO - 10.1016/j.energy.2007.05.016
M3 - Article
VL - 32
SP - 2072
EP - 2080
JO - Energy
JF - Energy
IS - 11
ER -