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Simulation to improve temperature and airflow patterns in tunnel ventilation systems

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  10th International Livestock Environment Symposium (ILES X)  .(doi:10.13031/iles.18-032)
Authors:   Daniella Jorge Moura, Vilmar Rodrigues Sousa, Jr
Keywords:   CFD, Airflow Pattern, Temperature Distribution

Abstract. Ventilation systems used in swine facilities should be studied because it directly affects the productivity in the pig farming sector. In this way, the uniformity of air distribution and temperature is essential to the animal welfare in this breeding environment. Thus, the purpose of this study was to identify whether changes in air entrances and exhaust fans positioning could influence the air velocity and temperature distribution. The experimental data were collected in a commercial full-scale sow‘s facility. The validation was carried out by comparing the simulated air temperature and data measured in the field. These results showed agreement between data with maximum relative errors of 3.5%. The real settings showed gradual increase in the air velocity from the air entrances and dead zones due to the airflow direction change. There was no difference when positioning of the exhaust fans is altered and it is maintained the original air entrances. The proposed arrangement with only one air intake reduced the areas of low air movement due to change of the flow direction. Besides, the variables have the same pattern along the transversal plane. The simulations showed that the position of the air inlets had higher influence on temperature distribution.

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