Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
MODELING EMISSIONS BY CHEMICAL KINETICS TO A GENSET WITH BLENDS OF DIESEL/BIODIESEL
Submission Author:
João Barbosa , PR , Brazil
Co-Authors:
João Barbosa, Carlos Henrique Matiolo, JOSÉ VIRIATO COELHO VARGAS, Wellington Balmant, Rodrigo César Raimundo, Dhyogo Miléo Taher, Flávio Júnior Santiago Silva, Matheus Cunha, Juliano Moreira Maurer, André Bellin Mariano
Presenter: Carlos Henrique Matiolo
doi://10.26678/ABCM.COBEM2023.COB2023-1606
Abstract
In recent years, biofuels have been identified as alternatives and possible solutions to the problems caused by the use of fossil fuels in energy production. Oils from different sources (fossil fuels, biodiesel from vegetable sources and diesel from microalgae i.e.) have been the subject of study by the scientific community. However, despite being sustainable and biodegradable, there are indications that engines fueled with biodiesel blends emit pollutants such as nitrogen oxides in greater quantities than when fueled by fossil diesel. The main objective was to develop a computationally lightweight model, from the point of view of chemical kinetics, but with the support of well-collected experimental data, through adjustment of mathematical models and experimental validation, thus producing accurate results. To determine the kinetic constants, the problem was faced as a situation of consumption and production, and to describe the analyzed scenario, seven species conservation reactions were proposed in this work, with that 15 kinetic constants to be determined. The Nelder-Mead Simplex Algorithm was selected to minimize errors between the model and experimental data. And, a computational code based on the FORTRAN® language was written. The validation of the proposed model was carried out by an experiment with a motor generator set (Genset) from Maquigeral model 12W, with a 44kW capacity; the diesel engine installed is a MWM D229/4 with natural aspiration and is coupled to the WEG GTA 201 AIHV generator. The Genset is installed in the Sustainable Energy Research and Development Center (NPDEAS), and an output power (energy load) of 5kW was applied, through the energy consumption of the building, at a constant rotation speed of 1800 rpm. With B11 fuel blends (petroleum diesel plus 11% biodiesel), B25, B50, B75 and B100. From this, the emissions of nitrogen and carbon oxides were measured. By evaluating the results between loads, the researchers developed a model capable of demonstrating how the emissions productions are influenced by the increase in the engine operating temperature. Moreover, considerably relevant results were obtained from the mathematical model for CO2 emissions, showing an error of 1% when compared to the experimental data.
Keywords
Emissons, Combustion, Model, ICO engine, GHG Emissions, Nelder-Mead method;, Biofuels, Diesel, biodiesel
