Efficiency of different ventilation concepts in meeting rooms

A typical virtual meeting room with occupants displays different situations of airflow pattern for different locations of the air supply even though the ventilation system has the same loca-tion of the air exhaust in the room. The pollutant is defined here as CO2 emitted by the occu-pants in the room. - The investigation is realised with full-scale numerical modelling under Computational Fluid Dynamics (CFD) method.
The results of these numerical experiments indicate the following: Even if the same ventilation system can provide enough outside air for a room in respect of a defined air change rate, there will be different ventilation efficiencies for different locations of the air supply and exhaust. The indoor air quality in a room is strongly affected by the loca-tion of air supply and air exhaust of a ventilation system