Comparison of Condensation Nucleus Counter, Electrical Aerosol Analyzer, and Carbon Monoxide Washout Data for Two Collective Shelters
Abstract
Data from a condensation nucleus counter indicate that washout of a propane-flame-produced aerosol from a chemical defense groundcrew shelter can be represented as an exponential decay with a halftime of 1.5 to 2 min depending on location in the shelter. Data from another shelter is more complex. The condensation nucleus counter data were augmented by particle size data from an electrical aerosol analyzer and by carbon monoxide data. The halftimes calculated from carbon monoxide, condensation nucleus counter, and electrical aerosol analyzer particle count data from one shelter are in general agreement. Data from the other shelter indicate that particle agglomeration is significant, and that total particle volume and carbon monoxide data give halftimes about twice as long as particle count data. Condensation nucleus counter data can be used to determine washout halftimes only when particle agglomeration is not significant with respect to washout.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1984
- Accession Number
- ADA150354
Entities
People
- A. Rachel Laird
- Daniel G. Beland
- James P. Conkle
- John N. Kerch
Organizations
- United States Air Force School of Aerospace Medicine