Study of the Airflow Around the Occupants in a Virtual Chamber Equipped with Impingement Ventilation System

The study of the airflow around the occupants in a virtual chamber equipped with impingement ventilation system is made. This numerical study is carried out using a coupling of an integral numerical model, that simulates human thermal response systems, and differential numerical model, that simulates the Computational Fluids Dynamics. The air velocity field, the Draught Risk field and the carbon dioxide concentration around the occupants, is made. The study was performed for winter typical conditions in a virtual chamber occupied by four occupants. The results show that the airflow, promoted by the impingement ventilation system, with a descendent airflow in the corners of the chamber, promotes an ascendant ventilation system around the occupants. The air velocity is higher in the floor level, the Draught Risk is lower around the occupants and the carbon dioxide concentration released by the occupants’ respiration is transported directly to the extraction system, located above the head level.