Wyniki wyszukiwania - BazTech

1

BMD bio - fuel for diesel engines

Sitnik L., Malinowski A., Matuszewska A., Biedrzycki J.

Journal of KONES

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2012

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Vol. 19, No. 1

365-370

EN

The paper regards the use of bio-blends consisting of vegetable oil and higher alcohol (biobutanol) as a new component of diesel fuels. The use of rapeseed oil as one of the components eliminates the need energy-intensive conversion rapeseed oil to FAME. The use of higher alcohol, such as a butanol obtained directly from biomass is in accordance with requirements of the EU on the promotion of renewable energy resources. Experiments on chassis dynamometer with fuels containing 20% by volume bio-blend (BM) and 80% of diesel fuels (D) were performed. Main parameters of engine (power output, torque, specific fuel consumption) and the main exhaust gas components (THC, CO, NOx and PM) showed very promising results. The properties of different alcohols and engine fuels, properties of investigated fuels, examples of investigations results on the car test chassis bed by NEDC test load and by fuelling the engine with investigated bmd20 and standard diesel fuel, relatives change of pollutants emission and fuel consumption by fuelling the car engine with BMD20 and Diesel fuel, the differences in emission and fuel consumption during fuelling the car engine with BMD20 and Diesel fuel recorded during the test bed investigation of the car, relatives change of pollutants emission and fuel consumption during engine fuelling with BMD20 and Diesel fuel are presented in the paper.

2

The effect of rapeseed oil blending with ethanol on engine performance and exhaust emissions

Labeckas G., Slavinskas S., Pauliukas A.

Journal of KONES

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2007

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Vol. 14, No. 3

331-338

EN

The article presents the bench testing results of a four stroke, four cylinder, direct injection, unmodified, naturally aspirated diesel engine operating on neat rapeseed oil (RO) and its 2.5vol% (ERO2.5) and 7.5vol percent (ERO7.5) blends with ethanol. The purpose of the research was to investigate the effect of ethanol inclusion in the RO and preheating temperature on bio-fuel viscosity, engine brake power, specific fuel consumption, break thermal efficiency and emission composition changes, especially NO, NO2, NOx, CO, CO2, HC and smoke opacity of the exhausts. Inclusion in the RO 2.5 and 7.5vol% of ethanol the blend viscosity at ambient temperature of 20 centigrade diminishes by 9.2 and 28.3%. During operation under constant air-to-fuel equivalence ratio gamma = 1.6, blends ERO2.5 and ERO7.5 ensure the brake mean effective pressure (bmep) lower at the maximum torque 1800 min-1 by 0.5 and 2.3% (bmep=0.770 mpa) and at rated 2200 min1 speed by 2.4 and 9.1% (bmep=0.740 mpa), correspondingly, than that of neat RO case. The bsfc at maximum torque (248.7 g/kwh) and rated power (247.5 g/kwh) for blends ERO2.5 and ERO7.5 is higher by 1.3-4.4% and 4.2-10.7% and the brake thermal efficiency lower by 0.5-1.5% and 3.3-7.6%, respectively. The tests revealed that during operation of the fully loaded engine at rated 2200 min-1 speed, ethanol inclusion in the RO up to 7.5vol% diminishes NO, nox, HC, CO2 emissions, smoke opacity and temperature of the exhausts however it may increase simultaneously NO2, NO2/NOx and CO emissions.

3

The effect of diesel fuel blending with rapeseed oil and rme on engine performance and exhaust emissions

Labeckas G., Slavinskas S.

Journal of KONES

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2005

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Vol. 12, No. 1-2

187-194

EN

The purpose of this research is to determine the effect of Diesel fuel blending with rapeseed oil (RO) and RME on the brake specific fuel consumption of a direct-injection Diesel engine, fuel energy conversion efficiency and evaluate the quantitative emission composition changes and smoke opacity of the exhausts. Test results show that the application for engine fuelling of Diesel fuel and rapeseed oil RO25 (1:4 by volume) as well as rapeseed methyl ester RME20 (1:5 by volume) blends at low-to-moderate revolutions does not affect greatly the brake specific fuel consumption (bsfc) however at the rated speed and fully opened throttle the bsfc for blends RO25 and RME20 is higher by 4.7% and 11.9%, respectively. The maximum emission of nitrogen oxides NOx at the rated power for blend RO25 is lower by 11.7% and for blend RME20 is higher by 44.7% related to Diesel fuel. The smoke opacity, emissions of carbon dioxide CO2, monoxide CO and unburned hydrocarbons HC released into atmosphere from the engine run at fully opened throttle on blend RO25 are more or less similar to that of Diesel fuel whereas during operation at the rated power on blend RME20, because of higher specific fuel consumption, the smoke opacity increases to 42.6% and emission of CO2 to 9.9%.