Prediction and Validation of Capture Efficiencies in a Simple Push-Pull Ventilation System
Public Deposited- Last Modified
- February 28, 2019
- Creator
-
Prat-Fourcade, Philippe
- Affiliation: Gillings School of Global Public Health, Department of Environmental Sciences and Engineering
- Abstract
- A push-pull ventilation system was installed in a wind tunnel where uniform perpendicular crossdraft velocities were generated. The push-pull ventilation system comprised a 4 inch diameter hood aligned with a 0.25 inch diameter jet. To determine capture efficiency of this system, tracer gas was injected in the jet and measured downstream in the hood duct. The hood exhaust was fixed at 500 cfm. For varying hood-jet distances, Z, and different crossdraft velocities, capture efficiencies were measured and plotted versus Z. A computer model was tested with these results: the predicted capture efficiencies were, on average, 33 % lower than the measured ones. This finding is consistent with other works on deflected jets and several explanations were suggested. An empirical model to predict capture efficiency within the range of study was proposed.
- Date of publication
- August 1991
- DOI
- Resource type
- Rights statement
- In Copyright
- Advisor
- Fox, Donald L.
- Flynn, Michael
- Miller, Cass T.
- Degree
- Master of Science in Public Health
- Academic concentration
- Industrial Hygiene
- Degree granting institution
- University of North Carolina at Chapel Hill
- Graduation year
- 1991
- Language
- Deposit record
- ad7e9272-7c4f-43e0-afeb-7a5f2526ad76
Relations
- Parents:
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