Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Thermal Conductivity of R134a.
Author Laesecke, A. ; Perkins, R. A. ; Nieto de Castro, C. A. ;
CORP Author National Inst. of Standards and Technology (CSTL), Boulder, CO. Thermophysics Div.;Environmental Protection Agency, Washington, DC.
Publisher 1992
Year Published 1992
Stock Number PB94-213063
Additional Subjects Fluorohydrocarbons ; Thermal conductivity ; Supercritical fluids ; Refrigerants ; Substitutes ; Temperature dependence ; Reprints ; R134a ; Ethane/tetrafluoro
Library Call Number Additional Info Location Last
NTIS  PB94-213063 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 11/11/1994
Collation 12p
Thermal conductivity measurements are reported for the alternative refrigerant 1,1,1,2-tetrafluoroethane (R134a). These measurements were made over the temperature range from 200 to 390 K at pressures to 70 MPa. Data are reported for the liquid, vapor, and supercritical fluid phases. A significant critical enhancement is observed for R134a. A thermal conductivity surface, which fits our data to + or - 3.8% at 95% confidence, is provided for R134a. Correlations are also provided for the saturated vapor and saturated liquid thermal conductivity of R134a. Comparisons are made with other available thermal conductivity data for the dilute gas, saturated vapor, and saturated liquid.