Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
Combustion and emission analysis of a single-cylinder compression ignition engine in a dual-fuel mode with HVO and biogas: a CFD approach
Submission Author:
Gustavo Vieira Frez , RJ , Brazil
Co-Authors:
Gustavo Vieira Frez, Túlio Augusto Zucareli de Souza, Gabriel Marques Pinto, Roberto Berlini Rodrigues da Costa, Luis Filipe de Almeida Roque, Christian Jeremi R. Coronado, Fagner Luis Goulart Dias
Presenter: Gustavo Vieira Frez
doi://10.26678/ABCM.COBEM2023.COB2023-0877
Abstract
A significant fraction of the Brazilian transportation matrix still relies on fossil fuels that produce harmful gases through combustion. Aiming to reduce these emissions and based on technological improvements and the potential shortage of this feedstock in the future, the use of renewable fuels has been the subject of many studies, which is particularly relevant to the national energy matrix, given its well-developed agricultural sector and large usable area. In this sense, hydrotreated vegetable oil (HVO) which is produced from vegetable oils or animal fats, is a promising option to substitute fossil diesel on internal combustion engines (ICE). Dual-fuel technology is another option to achieve the desired efficiency and control of emissions in ICE, which allows the engine to take advantage of the properties of two different fuels simultaneously in a proper operation. Most of the studies on these subjects presented in the literature are experimental. In this context, this work presents a development of a 3D computational model using ANSYS/Forte to simulate a single-cylinder 4-stroke diesel engine operating in a constant velocity in single and dual-fuel mode with HVO and HVO-biogas, respectively. In the dual-fuel mode, HVO was directly injected into the combustion chamber, and the gaseous fuel (biogas) was port-injected. Experimental data was used to validate the model. The computational results for the in-cylinder pressure curves showed a good agreement with the curves obtained by experimental tests in a Buffalo BFDE 10.0 engine. Furthermore, it was observed that the maximum values of pressure, temperature, and apparent heat release rate were reduced on the dual-fuel operation. Finally, the injection of biogas in the system resulted in a longer start of combustion and a reduction in the emissions of NOx and soot, showing that the dual-fuel operation is a good strategy to reduce the pollutant emission maintaining similar operation and efficiency conditions.
Keywords
Diesel engine, HVO, Biogas, DUAL FUEL, CFD analysis
