Energy and exergy analysis and multi-objective optimization of a biodiesel fueled direct ignition engine

Análisis de energía, exergía y emisiones de un motor de encendido por compresión modificado que funciona en modo de combustible triple

“…Making a better use ofexcess air, the brake thermal efficiency was minimized, and the torque rate was maximized. Raja et al (2022) discussed the evaluation of the the ignition engine condition based on the Taguchi method. The carbon nanotubes blended the fuel at different engine load conditions, and showed the association of varied ignition temperature levels.…”

“…Here, the x-axis represents the BTE, and the varying load (kg) is represented on the y-axis. The BTE with various loads (kg) at constant engine speed is compared for diesel, diesel with hydroxyl gas (HHO) (Sharma et al, 2020), diesel with compressed natural gas (CNG) (Pathak et al, 2021), diesel with hydrogen gas (HG) (Kokabi et al, 2021), diesel with biodiesel (Raja et al, 2022) and the proposed approach. From the figure, it is determined that for the load (kg) with the whole range, the dual fuel mode of BTE is minimal when compared with other fuel modes.…”

Energy Efficiency Evaluation and Forecasting of the Sussex Ports to Address Climate Change Concerns: a Data-driven Decision Model

“…An increasing trend was observed for the exergy through the exhaust and heat transfer due to the intensifying flow rate of exergy exhaust gas resulting from fuel mixture consequent to incomplete combustion of hydrocarbons with more long chain in the fuel that exhibited an increase of exergy exhaust rate by 18.35%, 18.4%, 18.46%, 18.54%, 18.7% and 18.86% and exergy transfer rate by 4.43%, 4.5%, 4.56%,4.62%, 4.69% and 4.77% for 'SBF20' , 'SBF40' , 'SBF60,' 'SBF80' , and 'SBF100' respectively. During combustion, major portion of the energy input was reported to be lost in transforming a tiny portion of it into exergetic work during an engine cycle and exergy destruction accounts for the main segment of the 'input exergy' lost [28,29] with an increasing trend for increased blend ratio being observed for 'SBF20' , 'SBF40' , 'SBF60' , 'SBF80' , and 'SBF100' that 46.14%, 46.29%, 46.39%, 46.47%, 46.51%, and 46.61% respectively.…”

Investigation of the combustion process in a dual-fuel engine

“…In existing combustion models in dual-fuel engines based on the separation of the combustion stages into two or three characteristic sections, the principle of superposition of these stages in the initial and main phases is used, which is due to the complexity of the separation of combustion into these sections. Thus, in the mathematical model for a dual-fuel alcohol engine with ignition fuel, it is assumed that the stages of fuel combustion are the sum of two combustion processes developing by different mechanisms [1][2][3][4]. At the same time, there is kinetic combustion of alcohol vapors entering the diesel engine and evaporating by the time ignition begins, and diffusion combustion of the ignition fuel with burning alcohol droplets that did not have time to evaporate before ignition, where each of the processes is supposed to use its own value of the parameter m. However, in a real engine, the combustion process of two fuels occurs simultaneously, affecting each other, so it is quite difficult to reliably determine when which fuel burns [5][6][7][8].…”