Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
MATHEMATICAL MODELING OF A SOLID WASTE INCINERATION SYSTEM AND STEAM GENERATION
Submission Author:
Matias Nicolas Muñoz , PR , Argentina
Co-Authors:
Matias Nicolas Muñoz, JOSÉ VIRIATO COELHO VARGAS, Wellington Balmant, Luiz Rigatti, Iago Gomes Costa, Leonardo Cavalheiro Martinez
Presenter: Matias Nicolas Muñoz
doi://10.26678/ABCM.ENCIT2018.CIT18-0134
Abstract
This article presents a mathematical model of an incinerator of urban solid waste and a dimensionless mathematical model of a heat exchanger. The model combines the principles of thermodynamics and heat and mass transfer, assuming thermodynamic control volumes for each component. The mathematical model is explained by a system of ordinary differential equations integrated in time, with precision and low computation time. For the heat exchanger, a dimensionless group of parameters was identified and presented in the form of graphs. The waste incinerator and the heat exchanger are already built and instrumented to obtain real temperature data. Therefore, the model was adjusted from a set of experimental data. Furthermore, the study analyzes the optimization of the distribution of the total area of heat transfer in the heat exchanger. In determining the distribution of the heat transfer area, the phase changes on the cold side of the heat exchanger (overheating, boiling and liquid) must be considered. The ideal configuration that maximizes the efficiency of the second thermodynamic law is also investigated. The results, using wood burning emissions (CH1,44 O0,66) show that the ideal distribution of the heat transfer area is obtained when the ratio of fluids is Mopt=0.20 the size being determined for the heat exchanger of heat of N = 9. However, with this configuration of the heat transfer area, it is obtained that the efficiency of the second thermodynamic law has a maximum of ηII = 0.54
Keywords
Mathematical Modeling., Incineration MSW, Heat exchanger, thermodynamic optimization
