Relative permittivity and resistivity of liquid HFC refrigerants under high pressure
- Kobe Univ. (Japan). Dept. of Chemical Science and Engineering
The static relative permittivity (dielectric constant) and the resistivity of HFC-236ea (CF{sub 3}-CHF-CHF{sub 2}) and HFC-245fa (CF{sub 3}-CH{sub 2}-CHF{sub 2}) in the liquid phase were studied at temperatures from 293 to 343 K and pressures from 0.1 to 50 MPa. The relative permittivity was measured by a concentric-cylinder-type capacitance cell with an LCR meter with an uncertainty of less than 0.1%. The resistivity was measured by a high resistance meter using plane-parallel platinum electrodes installed in a borosilicate glass syringe. It was found that the relative permittivities and the resistivities of liquid HFC-236ea and HFC-245fa at 303 K and 0.101325 MPa are about 5.13 and 6.54 and 1.5 {times} 10{sup 10} and 0.2 {times} 10{sup 10} {Omega} {center_dot} cm, respectively. The relative permittivity and the resistivity increase monotonically with increasing pressure and decreasing temperature.
- OSTI ID:
- 345200
- Report Number(s):
- CONF-970629--
- Journal Information:
- International Journal of Thermophysics, Journal Name: International Journal of Thermophysics Journal Issue: 1 Vol. 20; ISSN 0195-928X; ISSN IJTHDY
- Country of Publication:
- United States
- Language:
- English
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