Effect of particle-size variation on filtration efficiency measured by the HEPA-filter quality-assurance test

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Description

A theoretical model has been used to calculate the filtration efficiency that would be indicated by the photometer for challenge aerosols of different size distributions and HEPA filters with different efficiencies as functions of particle size. The model compares the calculated overall efficiency indicated by the photometer with efficiencies calculated with respect to particle number and mass. This calculation assumes three aerosol distributions previously measured at the Filter Test Facilities and four different filtration efficiency versus size curves. The differences in efficiency measured by the QA test procedure and the efficiencies with respect to aerosol mass and number have been ... continued below

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Pages: 15

Creation Information

Tillery, M.I.; Salzman, G.C. & Ettinger, H.J. January 1, 1982.

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Description

A theoretical model has been used to calculate the filtration efficiency that would be indicated by the photometer for challenge aerosols of different size distributions and HEPA filters with different efficiencies as functions of particle size. The model compares the calculated overall efficiency indicated by the photometer with efficiencies calculated with respect to particle number and mass. This calculation assumes three aerosol distributions previously measured at the Filter Test Facilities and four different filtration efficiency versus size curves. The differences in efficiency measured by the QA test procedure and the efficiencies with respect to aerosol mass and number have been calculated for a range of different size particles. The results of these calculations are discussed.

Physical Description

Pages: 15

Notes

NTIS, PC A02/MF A01.

Source

  • 17. DOE nuclear air cleaning conference, Denver, CO, USA, 1 Aug 1982

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Identifier

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  • Other: DE82019552
  • Report No.: LA-UR-82-2280
  • Report No.: CONF-820833-1
  • Grant Number: W-7405-ENG-36
  • DOI: 10.2172/5139041 | External Link
  • Office of Scientific & Technical Information Report Number: 5139041
  • Archival Resource Key: ark:/67531/metadc1061908

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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Creation Date

  • January 1, 1982

Added to The UNT Digital Library

  • Jan. 22, 2018, 7:23 a.m.

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  • Feb. 1, 2018, 7:04 p.m.

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Tillery, M.I.; Salzman, G.C. & Ettinger, H.J. Effect of particle-size variation on filtration efficiency measured by the HEPA-filter quality-assurance test, report, January 1, 1982; New Mexico. (digital.library.unt.edu/ark:/67531/metadc1061908/: accessed September 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.