Experimental Studies of a Naturally Aspirated, DI Diesel Engine Fuelled with Ethanol−Biodiesel−Water Microemulsions

Abstract

The main objective of this paper is to study the performance, emissions, and combustion characteristics of the diesel engine using ethanol-biodiesel-water microemulsions. The results indicated that although the microemulsions exhibited similar combustion stages to that of biodiesel, some differences were observed between biodiesel and microemulsions. Biodiesel showed an earlier start of combustion at all engine operating conditions, while the ignition delays of the microemulsions were longer. The peak cylinder pressures of the microemulsions were lower at low engine loads, and almost similar to that of biodiesel at medium and high engine loads. The peaks of heat release rate of the microemulsions were almost similar to that of biodiesel at low engine loads, but slightly higher at medium and high engine loads. The combustion durations of the microemulsions were longer at low engine loads and speed, but shorter at medium and high engine loads. For the microemulsions, there were slightly higher brake specific fuel consumptions (BSFC), while lower brake specific energy consumptions (BSEC). Drastic reduction in smoke was observed with the microemulsions at high engine loads. Nitrogen oxides (NOx) emissions were found slightly lower under almost all engine operating conditions for the microemulsions.

Feasibility of using less viscous and lower cetane (LVLC) fuels in a diesel engine: A review

“…In addition to alcohol-diesel blends, there were also attempts to use alcohol-biodiesel-diesel blends in diesel engine. Since the summary of alcohol-biodiesel [85,107,[120][121][122][123][124][125][126][127][128][129][130][131][132][133] and alcohol-biodiesel-diesel blends [84,89,95, has not been unraveled thus far, data pertaining to their engine characteristics has been outlined in Table 3.…”

Effect of metal based additive on performance emission and combustion characteristics of diesel engine fuelled with biodiesel

“…14. Crank angle corresponding to 5% and 95% mass burnt has been taken as the combustion duration [55]. The combustion duration of all the tested fuels increases with increasing engine loads, due to accumulation of more fuel inside the cylinder.…”

Comparative studies of a bioethanol fuelled DI diesel engine with a cetane improver

“…The surfactant was used to reduce the oil and water surface tension, to make micro emulsions by maximising the surface area. Span 80 has a hydrophilic lipophilic balance (HLB) number of 4.3 and, it is more lipophilic than hydrophilic which is an appropriate surfactant for water-in-oil-emulsion (Qi et al, 2010). The resultant mixture was stirred vigorously with the help of a mechanical agitator at the rate of 1,800 to 2,000 rpm for about 30 minutes.…”