ISSN:
1572-9567
Keywords:
alternative refrigerant
;
equation of state
;
Helmholtz energy
;
R-143a
;
1,1,1-trifluoroethane
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract A fundamental equation of state has been developed for 1,1,1-trifluoroethane (R-143a) using the dimensionless Helmholtz energy. The experimental thermodynamic property data, which cover temperatures from the triple point (161 K) to 433 K and pressures up to 35 MPa, are used to develop the present equation. These data are represented by the present equation within their reported experimental uncertainties: ±0.1% in density for both vapor and liquid phase P–ρ–T data, ±1% in isochoric specific heat capacities, and ±0.02% in the vapor phase speed-of-sound data. The extended range of validity of the present model covers temperatures from 160 to 650 K and pressures up to 50 MPa as verified by the thermodynamic behavior of the isobaric heat-capacity values over the entire fluid phase.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1022645626800
Permalink
