Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
Numerical Analysys of a Split Air-Conditioning System Using Transient Boundary Conditions
Submission Author:
Vicente Luiz Scalon , SP
Co-Authors:
Caio Augusto Garcia Ribeiro, Vicente Luiz Scalon, Alcides Padilha
Presenter: Vicente Luiz Scalon
doi://10.26678/ABCM.ENCIT2018.CIT18-0591
Abstract
Energy consumption has been modified in recent years, especially because air-conditioning devices has become largely responsible for the increase in demand, particularly in tropical countries. This increase is due to the reduction in the air-conditioners price for homes, commercial and office facilities. An attenuation of this consumption issue would be to develop devices with the same refrigeration quality of the present, but that would consume much less energy. In addition, it is worth mentioning that, the most common devices used in residence, small shops and offices are Split Air Conditioning System, with a High wall internal unit. The evaporator control is based on the return temperature that implies in a waste of energy for not controlling areas of greater interest or even thermal discomfort in some regions. Considering this aspect, a numerical solution, using a CFD code, will be proposed using the energy-difference equations combined with the Navier-Stokes equations, considering a turbulent flow based in a semi-empirical k-$\epsilon$ turbulent model of two equations, to evaluate the behavior of the temperature profile in a standardized room. A numerical model was elaborated for analyzing the thermal behavior of the room with the swing mode. Analyzing the results, one can conclude the high performance of this mode when compared with operation using a fixed angle.
Keywords
Split ACS, Computational Fluid Dynamics, Transient Boundary Conditions, OpenFOAM
