Eventos Anais de eventos
CONEM 2018
X Congresso Nacional de Engenharia Mecânica
EXPERIMENTAL AND COMPUTATIONAL SIMULATION OF A CONCENTRIC TUBES HEAT EXCHANGER: THERMAL EFFECTIVENESS AND NUMERIC MODEL MICRO FINS ADDITION ANALYSIS
Submission Author:
Breno Gusmão Barbosa , MG
Co-Authors:
Breno Gusmão Barbosa, Estêvão Lannes Tolentino, Julio Ziviani Pochmann, Frederico Romagnoli Silveira Lima
Presenter: Breno Gusmão Barbosa
doi://10.26678/ABCM.CONEM2018.CON18-0286
Abstract
A concentric tubes heat exchanger belonging to the thermal fluid dynamics laboratory of the Centro Federal de Educação Tecnológica de Minas Gerais was analyzed. The heat exchanger was experimentally studied in a laboratorial test bench and a numerical finite element model was created using the COMSOL Multiphysics software. Input parameters as hot and cold side inlet water temperatures and flow rates were varied in order to gather output data of the heat exchanger as thermal effectiveness. The experimental and numeric results were compared to validate the created model. The model definition of material, finite element mesh assembled and the appropriate boundary conditions were set to faithfully represent the physicals phenomena of heat transfer and fluid mechanics involved. The thermal effectiveness variation with addition of annular micro fins on the external surface of the inner tube of the heat exchanger was simulated and analyzed. Through a parametric study, the raise of 10% in thermal effectiveness could be achieved with the micro fins assembly.
Keywords
Concentric Tubes Heat Exchanger, COMSOL Multiphysics, Thermal Effectiviness, Micro Fins
