Análise termo fluidodinâmica de ambientes com ar-condicionado usando o código livre OpenFOAM
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2023-08-28
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Universidade Federal de Goiás
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Ventilation, cooling and heating systems have become indispensable for occupied environments that demand thermal comfort. Thermal comfort has a direct impact on productivity,
well-being, health and also on energy consumption, given that by reaching the ideal room
temperature, the air conditioning reduces the compressor’s operating time. Computational
Fluid Dynamics is an important tool for the study of fluid flows, because with its use it
is possible to evaluate the behavior of a given fluid applied under conditions established
by the user. At first, in the present research, a thermal comfort study is carried out,
using the OpenFOAM software, under conditions similar to those of a reference article,
in order to compare the results and validate the OpenFOAM algorithm. In the reference
article, a proprietary software which requires the acquisition of a license was used, while
OpenFOAM is a open source software. Therefore, this study opens opportunities for
analysis of heating, ventilation and air conditioning (HVAC) systems with the use of an
accessible program, allowing the optimization of the climatization of a place. Next, the
optimization of ventilation systems is evaluated through a factorial design that changes
the air inlet and outlet positions, in addition to the insufflation speed. It is observed
that the superior positions provided the best thermal comfort results, according to the
Air Diffusion Performance Index (ADPI). Finally, the behavior of a air conditioner split
Hi Wall type, based on ADPI, is investigated. The results provide information that ,for
environments with an exhaust fan, lower the supply speed, greater the thermal comfort.
As for environments without exhaustion, ADPI is better when the air intake velocity is
higher.
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BEGHELLI, J. M. Análise termo fluidodinâmica de ambientes com ar-condicionado usando o código livre OpenFOAM. 2023. 122 f. Dissertação (Mestrado em em Engenharia Mecânica) - Escola de Engenharia Elétrica, Mecânica e de Computação, Universidade Federal de Goiás, Goiânia, 2023.