Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
NUMERICAL / EXPERIMENTAL METHODOLOGY FOR DETERMINATION SIMULTANEOUS AND MONITORING OF THERMAL PROPERTIES AND INTERNAL TEMPERATURE OF EQUIPMENT IN SITU
Submission Author:
Solidônio Carvalho , MG
Co-Authors:
Solidônio Carvalho, Bruno Henrique Oliveira Mulina, Valério Luiz Borges
Presenter: Solidônio Carvalho
doi://10.26678/ABCM.COBEM2017.COB17-0969
Abstract
The temperature is a good indication of the operating state of equipment. However, the majority of the processes do not have thermal sensors in their internal part, being common the application of the measured temperatures in the outside for control. It is known, however, that this depends strongly on several parameters, increasing the uncertainties in the measurements. There are also several industrial areas, such as the petrochemical, steel and refrigeration industries, which depend on the continuous monitoring of the physical and dimensional characteristics of certain components, such as thickness or existence of crumbling in the internal walls of pipes, in order to define preventive and predictive maintenance of these parts. With the objective of determining the internal temperature of industrial equipment, this work proposes the development of a numerical-experimental technique and of non-invasive methods to arrive to estimate the internal temperature and thermophysical properties of materials. The work aims at the development of a technique with reduced computational cost, which allows the determination of the thermal properties of items such as equipment casings or ducts, even after installed and in operation, and the temperature on the internal surface of the monitored area. Such estimation makes use of experimental data involving the temperature and the heat flux monitored in accessible regions, on the external surface of the equipment, and application of a one-dimensional transient thermal model and inverse problems. The results show that the technique is promising both for the momentary determination of the characteristics of interest and as a tool for continuous monitoring of the temperature and thermal properties of the materials.
Keywords
Internal temperature, thermal properties, Inverse problems, non-invasive methods, preventive and predictive maintenance
