Record Display for the EPA National Library Catalog


Main Title Field evaluation of an autoisokinetic stack particulate sampling system /
Author Smith, Walter S. ; Stewart., Emil W.
Other Authors
Author Title of a Work
Stewart, Emil W.
CORP Author Entropy Environmentalists, Inc., Research Triangle Park, N.C.;Environmental Sciences Research Lab., Research Triangle Park, N.C.
Publisher U.S. Environmental Protection Agency, Environmental Sciences Research Laboratory,
Year Published 1977
Report Number EPA-600/2-77-035; EPA-68-02-2226
Stock Number PB-264 223
OCLC Number 42243337
Subjects Air sampling apparatus--Evaluation. ; Automatic control. ; Air--Pollution--Measurement.
Additional Subjects Particles ; Measuring instruments ; Air pollution ; Samplers ; Field tests ; Calibrating ; Design criteria ; Performance evaluation ; Mass flow ; Industrial wastes ; Combustion products ; Chimney ; Flue gases ; Sites ; Stationary sources ; Air pollution sampling ; Autoisokinetic samplers
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD ARCHIVE EPA 600-2-77-035 Headquarters Library/Washington,DC 10/26/2011
EJBD  EPA 600-2-77-035 Headquarters Library/Washington,DC 09/18/2014
ESAD  EPA 600-2-77-035 Region 10 Library/Seattle,WA 03/23/2010
NTIS  PB-264 223 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation viii, 50 pp. : graphs ; 28 cm.
The performance of a prototype autoisokinetic stack particulate sampling system, designed to maintain automatically isokinetic sampling conditions, was evaluated in field tests at stationary sources. Tests were conducted to determine the operating limits and characteristics of the system. Preliminary tests demonstrated the necessity of making several modifications to the existing system to improve the level of performance for the field evaluation program. Improvements were made in the problem areas of the performance of the mass flowmeter, flow totalizer, and flow control valve systems and in the sampling nozzles. The autoisokinetic sampler was tested at four field installations selected to provide a wide range of sampling conditions. The results of the testing and analysis showed that the sampling system maintained acceptable isokinetic sampling rates of 100% + or - 10 at only one of four sources. An inverse relationship between the percent of isokinetic rate and the temperature of the gas stream being sampled was found. The evaluation revealed that the sampler will operate only in the narrow range of stack gas static pressures of + or - 3 inches water column. The physical hardware was found to be fragile and difficult to operate in the field. Overall, the autoisokinetic sampling system failed to meet the design goals.
"EPA-600/2-77-035" -- Cover. EPA grant no. 68-02-2226 ; EPA project officer: Thomas E. Ward.