Influence of displacement ventilation on the distribution of pollutant concentrations in livestock housing

Abstract Under replacement ventilation conditions, a simplified physical model of tall space (livestock house) was established using ProSim software, and the relevant boundary conditions were set. The airflow size direction distribution under different air supply exhaust obtained by slicing, simulation results showed that appropriately increasing helps to increase pollutant emission rate so pollutants can be discharged in time, but when increased certain extent, these will cause vortex phenomenon near source, which enhance mixing effect surrounding air, making up concentration also. study found indoor volume is 45 times/h, optimal lowest.