Energy-Exergy Analysis of Diesel Engine Fueled with Microalgae Biodiesel-Diesel Blend

Abstract

Renewable energy is getting more attention in recent times due to the rapid depletion of fossil fuel reserves. Production and consumption of biofuels derived from biomass has significantly increased. In the present work, Spirulina microalgae have been chosen as feedstock for biodiesel production. Diesel and biodiesel were mixed in different volumetric ratios to prepare fuel blends (SBF0, SBF20, SBF40, SBF60, SBF80, and SBF100). Energy and exergy analysis has been performed on a four-stroke, single-cylinder diesel engine. Experimentation was done under varying loads at 1500 RPM. The effect of multiple loads and blends was investigated for brake power (BP), cooling water losses (Qw), exhaust gas losses (Qexh), and unaccounted losses (Qun). Pure diesel SBF100 has the highest and lowest exergy efficiencies, respectively equaling roughly 31.65% and 29.75%. It has been observed that BP and Qw increase with the increase in load whereas Qexh and Qun show a decreasing trend. It was also observed that with an increase in blending, Qw increases while Qexh decreases. In the exergy analysis, it was observed that the exergy destruction rate has a maximum fraction of input exergy values of 46.01% and 46.29% for Diesel and SBF20 respectively. The system engine sustainability index was in the range of 1.27 to 1.46, which is directly related to exergy efficiencies.

Investigating the Combined Impact of Water–Diesel Emulsion and Al2O3 Nanoparticles on the Performance and the Emissions from a Diesel Engine via the Design of Experiment

“…For all models, in terms of pure error, the F value (the lack of fit) shows that it is not significant. The model fit is sufficient if there is no significant lack of fit [57]. All models should be utilized to explore the design space because the obtained signal-to-noise ratios (Adequate Precision) for the models are more than four [58].…”

Examination of a CI engine running on poppy seed oil biodiesel/n-pentanol/diesel fuel blends with respect of thermodynamic and economic perspectives

“…In the calculations, the reference ambient temperature and pressure values were taken as T 0 = 298.15 K and P 0 = 100 kPa, respectively, and were assumed to remain the same throughout the experiment. In addition to the aforesaid assumptions, the reference environment was considered to be an ideal gas [52][53][54][55].…”

Large-Scale Simulation of Full Three-Dimensional Flow and Combustion of an Aero-Turbofan Engine on Sunway TaihuLight Supercomputer

“…With the arbitrary mesh interface (AMI) boundary processing mechanism, programming wall barriers were broken, and the parallel ability was improved effectively; meanwhile, supercomputer resources were optimized reasonably. These technological innovations have made three-dimensional simulations of the whole aeroengine a reality [ 14 ].…”