Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
Thermal-hydrodynamic Numerical Modeling of Household Vapor Compression Refrigeration Systems
Submission Author:
Álvaro Gardenghi , SP , Brazil
Co-Authors:
Álvaro Gardenghi, Luben Cabezas Gómez, Cristiano Tibiriçá, Jônatas Ferreira Lacerda
Presenter: Álvaro Gardenghi
doi://10.26678/ABCM.COBEM2019.COB2019-0533
Abstract
Efforts and solutions to improve the efficiency of refrigeration systems have been carried out along time, showing its importance, both on academy and industry. To evaluate the system performance, experimental tests are very usual. Several parameters can impact performance, such as heat exchangers (condenser and evaporator) and compressor efficiencies, cabinet insulation, compressor control strategies, and the choose of refrigerant and its amount. So, on the development phase of a project, these parameters should be correctly defined and, this way to adjust them, on each condition and each modification considered, another experiment is carried out, which is usually expensive and time demanding. This way, the modeling and simulation of such systems are very useful features to support the tests. On this work, a program on Python language was developed to perform a transient simulation of the system. Therefore, with the compressor rotation and the refrigerant charge as inputs, parameters as sub-cooling and superheating, mass flow on compressor and on capillary tube, mass of refrigerant on condenser and evaporator, pressures dynamics, surface temperatures and performance parameters, such as compressor consumption, refrigeration capacity and the coefficient of performance (COP) can be obtained. Besides, a simulation of a pull-down test was performed.
Keywords
Numerical Modeling, Refrigeration, Efficiency, Thermal-hydrodynamic Model
