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Numerical study on the convective heat transfer of fattening pigs in mechanical ventilated pig house

Year: 2016
Type: conference-paper
Abstract: It is recognized that increasing the local air speed in the animal occupied zone (AOZ) is one of the effective approaches to decrease the heat stress of pigs.To predict the effects by varying the air speed in AOZ, knowledge of convection heat loss and air speed is essential.In this study, the convective heat loss from pig is studied based on numerical simulation on a semi-practical condition.The convective heat transfer coefficients from grouped pigs were tested under different inlet speeds.The pigs in three different body weights, i.e., 30kg, 50kg, and 80kg were used in investigations.Two inlet styles, conventional inlet with upwards airflow direction and modified inlet which supplied the air directly on the pigs in pen, were compared to estimate the effect of ventilation systems on the convective heat loss of pigs.The results showed that convective heat transfer coefficient of pigs in group was strongly correlated with the inlet air speed.The weight of pig models showed no significant effect on the convective heat transfer coefficient (P<0.05).Comparison between the group pigs with downwards inlet and upwards inlet indicated that the convective heat transfer coefficient was averagely 60.4% higher in the case with downwards inlet than the upwards inlet.
Institution: Aarhus University
Language: English
Open Access status: green
OpenAlex ID: W4412316943
FWCI: 12.78
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Cited by: 2
Related to: 10