| Author(s): |
Arno R. Laesecke; Scott Bair; |
| Title: |
High Pressure Viscosity Measurements of 1,1,1,2-Tetrafluoroethane |
| Published: |
April 27, 2011 |
| Abstract: |
Viscosity measurements have been carried out with a falling-cylinder instrument in the compressed liquid and supercritical region of the hydrofluorocarbon 1,1,1,2-tetrafluoroethane (R134a). A highly pure sample was used. The measurement region at temperatures from 293.15 K to 438.15 K with pressures from 10 MPa to 400 MPa extends the existing data range substantially. With estimated uncertainties of 3 % for viscosity, 1 MPa for pressure and 0.7 K for temperature the new results allow to reconcile inconsistencies between literature data sets. They provide also a test of the extrapolation capability of existing viscosity correlations for this fluid and enable the development of a more accurate and wider ranging formulation. |
| Citation: |
International Journal of Thermophysics |
| Volume: |
32 |
| Pages: |
pp. 925 - 941 |
| Keywords: |
1,1,1,2-tetrafluoroethane; Compressed liquid; Falling-body viscometer; High pressure; n-octane; R134a; Supercritical; Viscosity |
| Research Areas: |
Properties, Thermophysics, Refrigerants |
| PDF version: |
 Click here to retrieve PDF version of paper (769KB) |
