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A Fundamental Study of Respiratory Air Filtration, Volume 2



Details

  • Personal Author:
  • Description:
    The purpose of this grant was to study characteristics of particulate air filters used in respiratory protective devices. In particular, efforts were made to determine the overall efficiency of the filters as a function of particle size and as a function of the velocity of air flow through the filter. A determination was also made of the resistance of the filter media to the flow of air. This specific report contained material from the final three chapters of the Grant Final Report. A numerical simulation model was designed and applied to the study of particle collection by electrically charged filter fibers. The results of dimensionless viscous drag calculations on rectangular fibers were presented along with information regarding single electret fiber capture efficiency results due to the Brownian diffusion, interception, or electrostatics. Single fiber capture efficiency was found to be proportional to 0.778, 0.54, and 0.15 powers of the solid volume fraction for the diffusion, interception, and Coulombic force interaction mechanisms, respectively, when an individual mechanism prevailed. The peak penetration of both solid monodisperse sodium- chloride particles and liquid DOP particles through respirator filters ranged from 1.2 to 30 percent at 16 liters per minute (lpm), from 3.5 to 37 percent at 28lpm, and from 6 to 45 percent at 48lpm. [Description provided by NIOSH]
  • Subjects:
  • Keywords:
  • Series:
    Grant Final Reports
  • Document Type:
    Text
  • Funding:
    Grant
  • Genre:
    Final Grant Report
  • Place as Subject:
  • CIO:
    National Institute for Occupational Safety and Health (NIOSH)
  • Division:
    OEP - Office of Extramural Programs
  • Topic:
    Workplace Safety & Health
  • Location:
    North America
  • Pages in Document:
    1-203
  • NIOSHTIC Number:
    nn:00184442
  • NTIS Accession Number:
    PB89-152912
  • Citation:
    Mechanical Engineering Department, University of Minnesota, Minneapolis, Minnesota 1988 Sep; :1-203
  • Contact Point Address:
    Mechanical Engineering University of Minnesota 111 Church Street, S E Minneapolis, Minn 55455
  • Federal Fiscal Year:
    1988
  • Performing Organization:
    University of Minnesota of Mnpls-St Paul, Minneapolis, Minnesota
  • Peer Reviewed:
    False
  • Start Date:
    19820701
  • Source Full Name:
    Mechanical Engineering Department, University of Minnesota, Minneapolis, Minnesota
  • End Date:
    19870331
  • Collection(s):
  • Main Document Checksum:
    urn:sha-512:fb584498088f3af359fd82ab61617c8fdf5253634c1bcea4a952f3510ce440edd0229f7136686bff742377f8f54e506944709399d4428fb5fc673853060b1fdf
  • Download URL:
  • File Type:
    Filetype[PDF - 3.36 MB ]
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