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ThinkMind // International Journal On Advances in Systems and Measurements, volume 11, numbers 3 and 4, 2018 // View article sysmea_v11_n34_2018_13


Experimental and Fundamental Analysis of the Dynamical Behavior for the Thermal Distribution in a Cooling Chamber

Authors:
Jesús Hernán Pérez Vázquez
Eloy Edmundo Rodriguez Vazquez
Carlos Alexander Nuñez Martín
Luis Alvaro Montoya Santiyanes
Israel Mejía Alonso
Guillermo Dominguez LIbrado

Keywords: Heat exchange;thermal diffusivity;finite volume.

Abstract:
A mathematical model is proposed to describe the dynamics of the heat extraction process in a domestic refrigerator. The concerned model is based on both the Newton's Law of Cooling and the Fourier Heat Equation; where the first one acts as the boundary condition to consider the physical properties of the insulation walls and their interaction with the environment and with the internal energy contained in the cooler chamber. The Fourier Equation has been implemented to describe the energetic behavior in the concerned chamber and it is grounded in the numerical consideration of the finite prismatic volumes concept, which take the respective thermodynamic properties of air or water as well as the thermal load distribution defines. The finite volume concept and the conductive equation consider the null mass exchange between volumes; therefore, heat conduction emulates the finite volumes interaction and convection simulates the cooling chamber boundaries. Codification was performed through Matlab and its experimental validation took places in the National Laboratory for Cooling Technology Research (LaNITeF). Certain finite volumes were located strategically into the cooling chamber to be compared with the sensor’s measurements. The model provides useful data to improve the understanding of the temperature behavior in terms of the chamber geometry, cool air flow and thermal load ratio, leading to basics concepts for the future development of control strategies to implement several energetic consumption optimization algorithms.

Pages: 373 to 382

Copyright: Copyright (c) to authors, 2018. Used with permission.

Publication date: December 30, 2018

Published in: journal

ISSN: 1942-261x

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