Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Sulfate Sampling Dilution Tunnel Design and Validation.
Author Ingalls., Melvin N. ;
CORP Author Southwest Research Inst., San Antonio, Tex.;Environmental Protection Agency, Ann Arbor, Mich. Emission Control Technology Div.
Year Published 1977
Report Number EPA-68-03-2196; SwRI-11-4291-008; EPA/460/3-77/025;
Stock Number PB-277 344
Additional Subjects Inorganic sulfates ; Samplers ; Sampling ; Exhaust emissions ; Design criteria ; Performance evaluation ; Aerosols ; Air pollution detection ; Dilution tunnels ; Automobile exhaust
Library Call Number Additional Info Location Last
NTIS  PB-277 344 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/23/1988
Collation 65p
This report describes the design features and development testing of a dilution tunnel for sampling automotive sulfate emissions. The design of the dilution tunnel and sampling system was the result of a concensus of ideas from representatives of the EPA and industry. The development testing included a propane traverse to verify exhaust mixing; testing the critical flow sampling system; development and use of a sulfate mist generator to determine system sulfate recovery; and evaluation of system losses using automotive exhaust. The propane traverse demonstrated acceptable exhaust gas mixing. While system losses were acceptable using the acid mist generator, the system was found to have unacceptable sulfate losses at tunnel temperatures above 85C (185F) when tested with automotive exhaust. At the completion of the development tests, the sampling system, including the tunnel and sampling and control console was delivered to EPA, Ann Arbor. A complete set of drawings of the tunnel was furnished with the tunnel.