Laesecke, A.
and Bair, S.
(2011),
High Pressure Viscosity Measurements of 1,1,1,2-Tetrafluoroethane, International Journal of Thermophysics, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=907475
(Accessed December 8, 2024)
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High Pressure Viscosity Measurements of 1,1,1,2-Tetrafluoroethane
Published
Author(s)
, Scott Bair
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
Pub Type
Journals
Download Paper
Keywords
1, 1, 1, 2-tetrafluoroethane, Compressed liquid, Falling-body viscometer, High pressure, n-octane, R134a, Supercritical, Viscosity
Citation
Issues
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Created April 27, 2011, Updated February 19, 2017