Análise de desempenho de um trocador de calor do tipo tubo carcaça

Abstract

In the presente paper a basic Computacinal Fluid Dynamics (CFD) study of a small shell and tube heat exchanger was performed using the ANSYS-CFD computational package. The main objective of the work is to provide an effective comparison of the thermal performance results obtained analytically and experimentally for the heat exchanger in study. To accomplish this goal, the assembly of an experimental unit for the exchanger operation was performed and the Ɛ-NUT methodology was selected for its theoretical evaluation. Finally, an introductory CFD approach was made in the study of the equipment, allowing the creation of a virtual analysis geometry for the heat exchanger and its discretization in the form of a computational mesh that can be used to enable a future fluid dynamics simulation of the equipments operation. Certain deviations were obtained between the analytical and experimental results, derived from hypotheses used to simplify the modeling of the heat transfer phenomenon, related to the heat exchanger, and due to the limitations of the designed experimental unit. Still, solid results were obtained in the discretization of the computational domain, obtaining quality values for the metrics that govern the study of computational mesh focused on CFD. In short, the work provided a comprehensive approach to the study of heat exchangers, allowing a wide field of view of the various methodologies, from the oldest to he most modern, used in the study of this equipment.