Contaminant reduction by ventilation in a confined space model - toxic concentrations versus oxygen deficiency.
Garrison-RP; Lee-K; Park-C
Am Ind Hyg Assoc J 1991 Dec; 52(12):542-546
A study was conducted to test and evaluate ventilation performance for air contaminants in a confined space (CS) model at concentrations much lower than those that cause oxygen deficiency. Isobutylene (115117) (IBE) was selected to simulate toxic concentrations because it was relatively safe to use and relatively easy to monitor. Data were obtained at several locations in a CS cubical model with variable ventilation mode, volume flow rate, and ventilation inlet/outlet elevations. The results indicated that ventilation causes contaminant reduction in a generally similar manner across a broad range of concentrations, from potentially toxic to oxygen deficient levels. Supply ventilation was generally more effective than exhaust ventilation for reducing contaminant concentrations ranging from the simulated toxic levels of IBE tested to much higher levels associated with oxygen deficiency. The authors conclude that specific empirical data may have good accuracy for some CS ventilation situations and may have limited accuracy for other contaminant conditions.
NIOSH-Publication; Air-quality-monitoring; Accident-prevention; Ventilation-systems; Air-quality-control; Toxic-gases; Confined-spaces; Simulation-methods
American Industrial Hygiene Association Journal