Field and wind tunnel study of building exhaust dilution
- Washington State Univ., Pullman, WA (United States)
Exhaust gas dilution rates were measured during one field study and two wind tunnel studies of two different university laboratory complexes. Observed dilution rates were generally highest for central, tall stacks which served as common exhaust for a number of laboratory fume hoods. Much smaller dilution rates were observed for side-wall, louvered exhaust vents due to the lack of vertical momentum and due to their very close proximity to rooftop fresh air inlets. Individual fume hood stacks exhibited high dilution rates, but because of the lack of initial dilution in the stack, the dilution rates did not exceed a selected guideline dilution level based upon a hypothetical spill of an air toxic. Comparison of measured field and wind tunnel dilution rates with a minimum dilution model indicated that the model provided a conservative estimate of dilution. Predictions from a lee cavity dilution model were also in good agreement with observations, but the model did not necessarily provide a conservative level of dilution.
- OSTI ID:
- 435762
- Report Number(s):
- CONF-951135--; ISBN 0-7918-1755-5
- Country of Publication:
- United States
- Language:
- English
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