Aerosol inhalability in low air movement environments

R. J. Aitken, P. E J Baldwin, G. C. Beaumont, L. C. Kenny, Andrew Maynard

Research output: Contribution to journalArticle

65 Citations (Scopus)

Abstract

Work has been carried our in two laboratories to consider the requirement of extending the definition of inhalability into low air movement environments, typical of many modern workplaces and indoor environments. The work has focused on two aspects, the development of a method for measurement of the aspiration efficiency of a breathing manikin (which is the basis of the current convention) in these conditions, and the subsequent measurement of that efficiency. A method has been devised for testing manikin aspiration efficiency in low air movement environments conditions using a chamber of dimensions approximately 1 m x 1 m x 3 m with pseudo-isokinetic reference probes circling about a vertical axis. This method has been shown to give consistent results between the laboratories, with significantly lower uncertainty than applies in wind tunnels. The manikin aspiration efficiency, tested at three breathing rates and over a range of particle aerodynamic diameters, was found to rise with breathing rate and be consistently higher than the existing convention. The results obtained indicate that human inhalability in low air movement environments may be significantly greater than that in moving air conditions with a maximum bias of 48% being measured. A revised form of the inhalable convention for low air movement environments is suggested.

Original languageEnglish (US)
Pages (from-to)613-626
Number of pages14
JournalJournal of Aerosol Science
Volume30
Issue number5
DOIs
StatePublished - Jun 1999
Externally publishedYes

Fingerprint

Aerosols
aerosol
Air
workplace
wind tunnel
aerodynamics
probe
Wind tunnels
Aerodynamics
air movement
air
convention
method
Testing
laboratory
rate

ASJC Scopus subject areas

  • Atmospheric Science
  • Environmental Science(all)

Cite this

Aerosol inhalability in low air movement environments. / Aitken, R. J.; Baldwin, P. E J; Beaumont, G. C.; Kenny, L. C.; Maynard, Andrew.

In: Journal of Aerosol Science, Vol. 30, No. 5, 06.1999, p. 613-626.

Research output: Contribution to journalArticle

Aitken, R. J. ; Baldwin, P. E J ; Beaumont, G. C. ; Kenny, L. C. ; Maynard, Andrew. / Aerosol inhalability in low air movement environments. In: Journal of Aerosol Science. 1999 ; Vol. 30, No. 5. pp. 613-626.
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