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The effect of an occupant's presence in a room on pollutant dispersion.
Lee-E; Feigley-CE; Khan-J; Ahmed-M; Tamanna-S
Indoor Air 2005 Oct; 15(Suppl 11):143
The pollutant dispersion pattern was investigated in an experimental room to determine if an occupant's presence can influence the distribution of pollutant concentration throughout the room, and thus affect the potential exposure levels of others in the room. It was found that the occupant's presence influenced the dispersion pattern in the occupied portion of the room for all conditions investigated, except for the ceiling diffuser-inlet/91.7 lsec-1. For the wall jet-inlet/91.7 lsec-1, concentrations near the source were higher for all occupant locations than when no occupant was present. Interestingly, when the occupant was located toward the room's north side, a high-concentration area was observed near the floor for both inlets at a ventilation flow rate of 55.0 lsec-1. Here it appeared that the natural convection was the dominant influence in this part of the room. This study indicates that pollutant dispersion patterns in an occupied, ventilated room depend upon the location of the occupant and the occupant's interaction with the velocity field.
Pollutants; Indoor-air-pollution; Exposure-levels; Dispersion; Ventilation; Air-quality; Air-monitoring; Indoor-environmental-quality; Air-flow
University of South Carolina at Columbia, Columbia, South Carolina
Page last reviewed: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division