Study on the Influence of Different Positions of the Air Inlets in the Kitchen on the Air Supplement Effect

When the hood is working, closing the kitchen doors and windows, using organized natural ventilation, can reduce part of the kitchen energy consumption and is more conducive to the discharge of kitchen pollutants. This study placed a natural air vent on the kitchen ceiling. In the case of the same hood exhaust volume and air supply port area, the choice of air supply port position has a great influence on the airflow organization of the hood. In this paper, several kitchens that installed air inlets at different positions were used as simulations in the CFD software.   For the turbulent flow of indoor airflow, the turbulent standard k-ε model is selected. And with the hybrid meshing method, control the finite volume method is used to discretize the calculation region. The study found that in the kitchen model of this study, the air filling effect was the best when the air inlet was 1 m from the reference wall. When the distance is long, the airflow of the air supply port has little interference to the hood. When the distance is relatively close, the airflow of the air supply port promotes the capture of the pollutants, and the superposition of the two effects determines the final air filling effect.