An International Standard Equation of State for the Thermodynamic Properties of HFC-125 (Pentafluoroethane)
作者:
Chun-Cheng Piao,
Masahiro Noguchi,
期刊:
Journal of Physical & Chemical Reference Data
(AIP Available online 1998)
卷期:
Volume 27,
issue 4
页码: 775-806
ISSN:0047-2689
年代: 1998
DOI:10.1063/1.556021
出版商: AIP
数据来源: AIP
摘要:
An 18-coefficient modified Benedict–Webb–Rubin equation of state for HFC-125 (pentafluoroethane) has been developed. Correlations of vapor pressure and saturated liquid density are also presented. This equation of state has been developed using experimental data for the relationship of pressure-volume-temperature of fluid, saturation properties, isochoric heat capacity data, and speed of sound data. The equation of state is valid in the superheated gaseous phase and the compressed liquid phase at pressures up to 68 MPa, densities to1700 kg/m3,and temperatures from the triple point (172.52 K) to 475 K. This equation of state has been selected as an international standard formulation for HFC-125 based on an evaluation of the available equations of state by Annex 18 of the International Energy Agency. ©1998 American Institute of Physics and American Chemical Society.
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