Abstract
This research investigates the effects of a synthetic diesel-like fuel (Fischer-Tropsch diesel) and biofuels (ethanol and biodiesel) fuel blends on the energy-exergy efficiencies and gaseous exhaust emissions characteristics of a compression ignition engine. Two blends of alternative fuels denoted as E15B35FTD50 (15% ethanol, 35% biodiesel, and 50% Fischer-Tropsch diesel) and E15B35D50 (15% ethanol, 35% biodiesel, and 50% diesel) were experimentally studied on a single-cylinder diesel engine and compared to diesel fuel. The results show that the energetic and the exergetic efficiencies of the alternative fuels are comparable to those of the engine fueled with diesel fuel. The unburnt HC, NO, N2O, and NH3 emissions were reduced for the two alternative fuel blends compared to diesel, while CO emissions increased. The light HC species were found to slightly increase for the alternative fuel blends in comparison with diesel fuel. However, the total HC was considerably reduced by the combustion of E15B35FTD50 not only when compared to the diesel fuel combustion, but also when compared to E15B35D50. Overall, these results may contribute to identifying advantages and limitations in terms of energetic-exergetic analysis and emissions for the new generation of conventional diesel and hybrid electric vehicles that aim to achieve future emissions regulations.
Highlights
Internal combustion engines (ICE) are the worldwide major powertrain system that enables road transportation
Current legislation is forcing the reduction of exhaust emissions, nitrogen oxides (NOx ) and particulate matter (PM) for compression ignition (CI) engines
Biofuels and hybrid electric vehicle synergies can effectively contribute to mitigating the dependence on fossil fuels as well as the greenhouse gases and air quality issues associated with their emissions
Summary
Internal combustion engines (ICE) are the worldwide major powertrain system that enables road transportation. Biofuels and hybrid electric vehicle synergies can effectively contribute to mitigating the dependence on fossil fuels as well as the greenhouse gases and air quality issues associated with their emissions. These synergies are applicable to the utilization of the fuel in the vehicle and in a well-to-wheel system evaluation. Biodiesel is a diesel-like fuel that can partially substitute the diesel fuel in a diesel engine These alternative fuels can form binary and ternary fuel blends to be used in CI engines without requiring major powertrain modifications [10]
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