Effect of particle-size variation on filtration efficiency measured by the HEPA-filter quality-assurance test
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.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 5139041
- Report Number(s):
- LA-UR-82-2280; CONF-820833-1; ON: DE82019552; TRN: 82-019210
- Resource Relation:
- Conference: 17. DOE nuclear air cleaning conference, Denver, CO, USA, 1 Aug 1982
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
AIR FILTERS
EFFICIENCY
FILTRATION
QUALITY ASSURANCE
EXPERIMENTAL DATA
PARTICLE SIZE
PARTICULATES
PERFORMANCE TESTING
RESPONSE MODIFYING FACTORS
DATA
EQUIPMENT
FILTERS
INFORMATION
NUMERICAL DATA
PARTICLES
POLLUTION CONTROL EQUIPMENT
SEPARATION PROCESSES
SIZE
TESTING
500200* - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)
500300 - Environment
Atmospheric- Radioactive Materials Monitoring & Transport- (-1989)