Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Humidity calculations used for mobile source emission testing /
Author Zellin, Eric.
CORP Author Environmental Protection Agency, Ann Arbor, MI. Certification Policy and Support Branch.
Publisher U.S. Environmental Protection Agency, Office of Air, Noise, and Radiation, Office of Mobile Sources Certification Division, Certification Policy and Support Branch,
Year Published 1983
Report Number EPA-AA-CPSB-83-01
Stock Number PB83-237461
OCLC Number 636071431
Subjects Hygrometry. ; Automobiles--Motors--Exhaust gas.
Additional Subjects Motor vehicle engines ; Exhaust emissions ; Humidity ; Dew point ; Hygrometers ; Psychrometers ; Vapor pressure ;
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
ELCD  EPA AA-CPSB-83-01 NVFEL Library/Ann Arbor, MI 07/06/2010
NTIS  PB83-237461 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 04/04/2019
Collation 15 p. ; 28 cm.
This report provides a summary of the calculations used to determine relative and specific humidity of moisture in air for mobile source (motor vehicle and engine) emission and fuel economy testing at the U.S. Environmental Protection Agency Motor Vehicle Emissions Laboratory in Ann Arbor, Michigan. The reference includes calculations required to determine the saturation vapor pressure of water, psychrometric equations used to calculate the partial pressure of water vapor for wet-bulb psychrometers, and equations for the enhancement factor of water and ice. Also included are the methods used from 1971 to the present (1982).
"February, 1983." Technical Report. "EPA-AA-CPSB-83-01." Includes bibliographical references (p. 13-14).