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 .
Highlights
Diesel engines are widely used to power engineering devices for its good durability and thermal efficiency
The following main results are summarized: up to BE35 obtained the increase in peak pressure, with the increase in ethanol fuel (EF) fraction in blend observed the increase in unrepeatability of cycles, up to BE30 blend noticed the increase in peak of Heat release rate (HRR)
The increase was about 30% in comparison with B100, the increase in ignition delay at BE45 blend in comparison with B100 was equal to 6 deg CA, with the increase in EF fraction in blend the combustion duration decreased
Summary
Diesel engines are widely used to power engineering devices for its good durability and thermal efficiency. In recent years ethanol is used as a fuel for diesel engines [10] It is utilized in both methods: blend or dual fuel co-combustion [8,9,10,11,12]. Some authors investigated the burning of mineral diesel-biodiesel-ethanol mixtures and the impact of that fuel on operating parameters and emission [14]. Tse et al [15] presented results of the combustion characteristics and particulate emissions of a diesel engine fuelled with diesel-biodiesel-ethanol blended fuel. They stated that ethanol causes higher peak in HRR, longer ignition delay. In this paper are presented results of investigation of one-cylinder direct injection air cooled diesel engine in which is made the attempt to burn a mixture of diesel-ethanol with large ethanol fuel (EF) fraction
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