A numerical study on pollutant removal effectiveness of a room.

Ventilation system has to be design in order to strike a balance between indoor air quality and energy requirements.So, the ventilation efficiency can be considered as a major issue to deal with this objective. In order to assess the efficiency of pollutant elimination from a room, a methodological approach using CPD has been developed. It is based both on local and global indexes. These indexes take into account the distribution of pollutant concentration inside room and the mean concentration at the exhaust with respect to the occupant location. Based on an isothe1maJ two dimensional test case of IEA Annex 20, a sensitivity analysis has been carried out to calculate the pollutant concentration with regards to the exhaust vent and pollutant source locations. The results obtained with the above-mentioned indexes have shown that each configuration can be characterized in connection with the efficiency of pollutant elimination. In addition, these indexes show how the connected location of both exhaust vent and pollutant source affects the indoor air quality.