Disertación de Maestría
DOI
10.11606/D.18.2007.tde-16062008-081514
Documento
Autor
Nombre completo
Sergio de Camargo Rangel
Área de Conocimiento
Fecha de Defensa
Publicación
São Carlos, 2007
Director
Tribunal
Cabezas Gómez, Luben (Presidente)
Módolo, Délson Luiz
Santos, Antonio Moreira dos
Título en portugués
Simulação transiente de um sistema de refrigeração doméstico: análise paramétrica
Palabras clave en portugués
Simulação transiente
Sistema de refrigeração doméstico
Resumen en portugués
Título en inglés
Transient simulation of a domestic refrigeration system: parametric analysis
Palabras clave en inglés
Domestic refrigeration system
Transient simulation
Resumen en inglés
In the present work are presented transient numerical simulation results of a vapor compression domestic refrigeration system considering the procedure described by JAKOBSEN (1995). The employed mathematical model is based on first order differential-algebraic equation (DAE) systems, obtained from energy balance in the different components of the refrigeration system, and from others relations that are necessary to simulate the global behavior of a refrigeration system. The resulting equation system is solved numerically in the free software WinDali developed at Technical University of Denmark. This software allows solving DAE systems that present mathematical discontinuities, using the Runge-Kutta method of fourth order. The employed mathematical model allows calculating the refrigeration system efficiency, predict the energy consumption, thermodynamically characterize the refrigeration system and its interactions and quantitatively describe the thermodynamic losses (entropy generation) of the system running in the operation regime. These results are obtained as a function of the compressor control strategy, compressor efficiency, and sizing of different components of the refrigeration system. The results confirm that the mathematical model and the computational program allow describing correctly the behavior of a domestic refrigeration system, resulting in a very useful tool for optimization of domestic refrigerators.

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Fecha de Publicación
2008-06-16