Record Display for the EPA National Library Catalog


Main Title Laboratory evaluation of the cleanable high efficiency air filter (CHEAF) /
Author Rei, Manual T.
Other Authors
Author Title of a Work
Cooper, Douglas W.,
CORP Author GCA Corp., Bedford, Mass.;Industrial Environmental Research Lab., Research Triangle Park, N.C.
Publisher U.S. Environmental Protection Agency, Office of Research and Development ; For sale by the National Technical Information Service,
Year Published 1976
Report Number EPA 600-2-76-202; GCA-TR-76-9-G; EPA-68-02-1487; EPA-ROAP-21ADL-004
Stock Number PB-256 689
OCLC Number 02545666
ISBN pbk.
Subjects Air--Pollution--United States ; Air filters ; Dust ; Aerosols
Additional Subjects Air pollution control equipment ; Particles ; Scrubbers ; Air filters ; Aerosols ; Fines ; Iron oxides ; Concentration(Composition) ; Impactors ; Condensation nuclei ; Design criteria ; Performance evaluation ; Cellular plastics ; Particle sizes ; Numerical analysis ; Polyurethane resins ; Comparison ; Efficiency ; Point sources ; Wet methods ; Cleanable high efficiency air filter
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD  EPA 600-2-76-202 Headquarters Library/Washington,DC 01/02/2020
ELBD ARCHIVE EPA 600-2-76-202 Received from HQ AWBERC Library/Cincinnati,OH 10/04/2023
ESAD  EPA 600-2-76-202 Region 10 Library/Seattle,WA 03/23/2010
NTIS  PB-256 689 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation ix, 123 pages : illustrations, graphs ; 28 cm.
The report gives results of testing a novel scrubber, the Cleanable High Efficiency Air Filter (CHEAF), as part of a program to identify novel high efficiency fine particle control devices. The scrubber was tested at room temperature, using iron oxide aerosols of concentrations near 0.2 g/cu m (0.1 grain/cu ft), mass median aerodynamic diameter of 1.1 micrometers. Inlet and outlet samples were taken with cascade impactors, total mass filters, a condensation nuclei counter, and an optical particle counter. These tests were performed with different filter media, at different face velocities, and at different water spray rates and water recycle rates. Efficiency increased with increases in: foam pores per inch, pressure drop, flow rate, spray rate, and make-up water addition. The results were consistent with the hypothesis that impaction is the major collection mechanism and re-entrainment contributes substantially to penetration. Total mass efficiency was approximately 95 percent at normal conditions, for which the pressure drop across the CHEAF was 80 cm (31.5 inches) WC. The particle aerodynamic cut diameter, for which the efficiency would be 50 percent at these conditions, was determined from cascade impactor data to be below 0.5 micrometer. This indicates that the 50 percent cut diameter for the CHEAF is smaller than for a venturi scrubber operating at the same pressure drop.
"EPA 600-2-76-202." "July 1976." Cover title. Prepared by GCA Corporation, Bedford, Ma., under contract no. 68-02-1487, ROAP no. 21ADL-004, program element no. 1AB012. Includes appendices. Includes bibliographical references (page 65).