Experimental investigations on combustion, performance and emissions characteristics of compression ignition engine powered by B100/ethanol blend

Abstract

Abstract. In the study are presented the results of co-combustion of biodiesel B100 with ethanol fuel as blend. The 1-cylinder direct injection compression ignition engine was used during the study. Tests were conducted at a constant angle of fuel injection and constant rotational speed equal to 1500 rpm. Results of thermal cycle parameters and emission characteristics are presented. On the basis of results stated that ethanol fuel fraction in blend causes the increase in peak heat release rate. With the increase in ethanol fuel fraction the ignition delay increased but combustion duration decreased. With the increase in ethanol fuel fraction in blend thermal efficiency increased as well. It also noticed almost constant emission of THC, the increase in NOx emissions and decrease emissions in CO and CO2.

Combustion of different reactivity fuel mixture in a dual fuel engine

“…Ethanol is considered a potential substitute to diesel fuel. It is renewable fuel, has a high latent heat of vaporization, it is an oxygenated fuel, sulfur-free and has the high burning rate, with high potential to reduce NO x and particulate matter (PM) emissions from Diesel engines [8][9][10]. One of the major limitations of using diesel fuel-ethanol blends in compression ignition engines is the low miscibility of ethanol in diesel fuel for a large temperature range, due to differences in the chemical structure of these components, which may cause phase separation [4,5,7].…”

“…Also, the blends are not stable and separate in the presence of trace amounts of water. In such a power system can not change the ratio of diesel /alcohol [4][5][6][7][8][9][10]. The co-combustion of fuels blends is interesting as well.…”

“…The co-combustion of fuels blends is interesting as well. In papers [4][5][6][7][8][9][10] are presented results of the investigation of co-combustion of alcohol fuels with diesel or biodiesel fuels. It was stated that the combustion process in the dual fuel engine fueled with diesel and alcohol fuels has different pattern compared to combustion in the conventional compression ignition engine.…”

“…With larger contents of ethanol in the fuel blends, the process of combustion of the bio-ethanol (BE) blend was characterized by lower ignition delay time and elongation of combustion duration compared to combustion of diesel-ethanol blend (DE) burn. Combustion of BE blend can be the source of greater specific total hydrocarbon (THC) emissions at substantially lower specific NO x emissions [4][5]9]. Some authors [11] investigated the possibility of adding ethanol as an additive with animal fat biodiesel that is tested as an alternative fuel for diesel in a compression ignition engine.…”

“…From the literature review, it is clear that most of the research work on ethanol has been done on blend with diesel [4][5][6][7][8][9] and [16][17][18]. Although many publications on dual fuel engines can be found in the literature, it seems that the topic has not been exhausted.…”