Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
MATHEMATICAL MODELING OF THE FLAME TEMPERATURE OF NATURAL GAS THROUGH METHANE CONCENTRATION, TEMPERATURE AND EXCESS AIR IN REHEATING FURNACES
Submission Author:
Diego Jhovanny Mariños Rosado , SP
Co-Authors:
Diego Jhovanny Mariños Rosado, Samir Boset Rojas Chávez, João Carvalho
Presenter: Diego Jhovanny Mariños Rosado
doi://10.26678/ABCM.COBEM2019.COB2019-0019
Abstract
The objective of this article was to develop a mathematical model for the determination of the adiabatic flame temperature in reheating furnaces, based on three independent variables such as the concentration of methane (CH4) in the preparation of the fuel (natural gas), excess air (α) and air temperature (Tair). The developed model applied the factorial experiment tool 23 and the statistical analysis. The accuracy of the model was tested in terms of the square correlation coefficient (R2). Finally, with the mathematical equation obtained, three cases were developed to obtain the maximum adiabatic flame temperature, varying two of the three initial factors (CH4, α and Tair) and keeping the third factor constant in each case. It was evidenced that the adiabatic flame temperature obtained by the mathematical model is equal in magnitude to those obtained by the stoichiometric reaction of the fuel, this was determined by the coefficient of correlation to the square (R2) that was equal to 1. In the same way, the maximum adiabatic flame temperature was obtained when the methane concentration in the fuel preparation is 70%, the excess air is 20% and the air is preheated to the temperature of 873K.
Keywords
adiabatic flame temperature, factorial experiments, industrial furnaces, mathematical modeling, steel industry.
