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Main Title Design and characterization of an isokinetic sampling train for particle size measurements using exhaust gas recirculation {microform} /
Author Williamson, Ashley D. ; Martin, R. S. ; Harris, D. B. ; Ward, T. E.
Other Authors
Author Title of a Work
Martin, R. S.
Harris, D. B.
Ward, T. E.
CORP Author Southern Research Inst., Birmingham, AL.;Environmental Monitoring Systems Lab., Research Triangle Park, NC. Quality Assurance Div.
Publisher U.S. Environmental Protection Agency, Environmental Monitoring Systems Laboratory,
Year Published 1984
Report Number EPA/600/D-84/158; EPA-68-02-3696
Stock Number PB84-201599
Additional Subjects Samplers ; Air pollution ; Particle size ; Design criteria ; Extraction ; Flyash ; Performance evaluation
Library Call Number Additional Info Location Last
NTIS  PB84-201599 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 17 p. ; : ill. ; 28 cm.
A particulate sampling train has been constructed which satisfies the conflicting requirements of isokinetic sample extraction and constant flowrate through an inertial sizing device. Its design allows a variable fraction of the filtered exhaust gas to be added to the sample upstream of the inertial sampler in order to maintain a preselected flowrate through this device while the gas flowrate into the sampling nozzle is adjusted to remain isokinetic with the local duct velocity. The prototype train was constructed by relatively simple modifications of a commercially available Method 5 sampling system, and much of the sampling technique is identical with Method 5 protocol. The train was tested by comparison of parallel runs in the EPA/SRI wind tunnel using redispersed flyash. In the first series of runs the EGR train without inertial sizing device sampled simultaneously with a colocated Method 17 sampling train. The average ratio of the measured mass concentrations was 1,003, with a standard deviation of 0.046. A second series of parallel isokinetic samples was taken using a dual cyclone sampler. The average mass concentration ratio for these runs was 0.988, with a standard deviation of 0.057.
"June 1984." "EPA-600/D-84/158." Includes bibliographical references. Microform.