Experimental relationship between the specific resistance of a HEPA (High Efficiency Particulate Air) filter and particle diameters of different aerosol materials

Conference · Mon Jan 01 00:00:00 EST 1990

OSTI ID:6360752

Novick, V J ^[1]; Monson, P R; Ellison, P E ^[2]

---

1. Argonne National Lab., IL (USA)
2. Westinghouse Savannah River Co., Aiken, SC (USA)

The increase in pressure drop across a HEPA filter has been measured as a function of the particle mass loading using two materials with different particle morphologies. The HEPA filter media chosen, is identical to the filter media used in the Airborne Activity Confinement System (AACS) on the Savannah River Reactors. The velocity through the test filter media was the same as the velocity through the AACS media, under normal operating flow conditions. Sodium Chloride challenge particles were generated using an atomizer, resulting in regularly shaped crystalline forms. Ammonium chloride aerosols were formed from the gas phase reaction of HCl and NH{sub 4}OH vapors resulting in irregular agglomerates. In both cases, the generation conditions were adjusted to provide several different particle size distributions. For each particle size distribution, the mass of material loaded per unit area of filter per unit pressure drop for a given filtration velocity (1/Specific resistance) was measured. Theoretical considerations in the most widely accepted filter cake model predict that the mass per unit area and per unit pressure drop should increase with the particle density times the particle diameter squared. However, these test results indicate that the increase in the mass loaded per unit area per unit pressure drop, for both materials, can be better described by plotting the specific resistance divided by the particle density as an inverse function of the particle density times the particle diameter squared. 9 refs., 7 figs.

• Research Organization: Argonne National Lab., IL (USA)
• Sponsoring Organization: DOE/NE
• DOE Contract Number: W-31109-ENG-38; AC09-89SR18035
• OSTI ID: 6360752
• Report Number(s): CONF-901228-1; ON: DE91006031; TRN: 91-002549
• Resource Relation: Conference: 6. Miami international symposium on heat and mass transfer, Miami, FL (USA), 10-12 Dec 1990
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
AIR FILTERS
PRESSURE DROP
PARTICLE SIZE
CORRELATIONS
RADIOACTIVE EFFLUENTS
FILTRATION
AEROSOLS
AMMONIUM CHLORIDES
CRYSTALS
DENSITY
FLOW RATE
GAS FLOW
PARTICLES
RADIOACTIVE WASTE MANAGEMENT
SAVANNAH RIVER PLANT
SODIUM CHLORIDES
ALKALI METAL COMPOUNDS
AMMONIUM COMPOUNDS
AMMONIUM HALIDES
CHLORIDES
CHLORINE COMPOUNDS
COLLOIDS
DISPERSIONS
EQUIPMENT
FILTERS
FLUID FLOW
HALIDES
HALOGEN COMPOUNDS
MANAGEMENT
MATERIALS
NATIONAL ORGANIZATIONS
PHYSICAL PROPERTIES
POLLUTION CONTROL EQUIPMENT
RADIOACTIVE MATERIALS
RADIOACTIVE WASTES
SEPARATION PROCESSES
SIZE
SODIUM COMPOUNDS
SOLS
US AEC
US DOE
US ERDA
US ORGANIZATIONS
WASTE MANAGEMENT
WASTES
220502* - Nuclear Reactor Technology- Environmental Aspects- Radioactive Effluents
220700 - Nuclear Reactor Technology- Plutonium & Isotope Production Reactors