Abstract
An equation of state for 1,1-difluoroethane (HFC 152a, CH3CHF2) has been developed on the basis of reliable experimental data including PVT, liquid Cp, and saturated-liquid-density data measured by our group. It is a non-dimensionalized virial equation whose functional form is the same as that originally developed for 1,1,1,2-tetrafluoroethane (HFC 134a) in our group. The effective range is for pressures up to 15 MPa, temperatures from 230 to 450 K, and densities to 1000 kg m-3. The equation represents reliable PVT measurements within ± 1% in pressure for the superheated vapour and supercritical fluid, while within ±0.5% in density for the compressed liquid. In addition, it should be noted that the equation represents the other essential thermodynamic properties including vapour pressures, saturated-liquid/ vapour densities, isobaric/isochoric specific heats and sound velocity in both the liquid and gaseous phase of HFC 152a.
Original language | English |
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Pages (from-to) | 347-352 |
Number of pages | 6 |
Journal | International Journal of Refrigeration |
Volume | 16 |
Issue number | 5 |
DOIs | |
Publication status | Published - 1993 |
Keywords
- R152a
- calculation
- equation of state
- measurement
- refrigerant
ASJC Scopus subject areas
- Building and Construction
- Mechanical Engineering