Análisis térmico del horno de la cabina de pintura automotriz de una ensambladora de autos en la ciudad de Ambato

Abstract

This technical project addresses the thermal analysis of a car assembler's automotive paint booth oven in Ambato. Therefore, the objective of this research was to carry out thermal analysis and simulation to estimate the temperature of the automotive paint booth oven's radiation and convection drying chamber. To carry out this study, reverse engineering was applied using metrology and SOLIDWORKS software. Thermal analyses were carried out in each of the zones of the oven cabin, considering the radiation and convection processes. Subsequently, ANSYS software was used to perform the thermal analysis and obtain heat transfer results by radiation and convection. The results revealed a heat transfer by radiation to the walls of the car, reaching a temperature of 430 K (157 °C), and a temperature of 435 K (162°C) in the drying chamber through heat transfer by convection. In addition, heat consumption values were obtained from the analysis of the chamber's operation, both by radiation (168,9763 kW) and by convection (129,9134 kW), respectively. A considerable reduction in heat will be observed by radiation by 16,05% and by convection by 38,7%. The simulation carried out using ANSYS FLUENT showed an average temperature of approximately 438 K in radiation and 441 K in convection in each analysis zone. In conclusion, the variation of the operating parameters indicates that the oven burners work with an efficiency of 47,55% and 57,77% in each zone, which results in a radiation efficiency of the oven of 66,42% and an efficiency through convection of 63,43%. Finally, functional tests will be carried out to characterize the paint drying in the unit.