Isochoric (p,v,T) Measurements on C2H4F2 (R152a) in the Liquid State from the Triple Point to 450 K and at Pressures up to 30 MPa

Blanke, W.; Weiß, R.

doi:10.1016/0378-3812(92)87066-v

Cited by 30 publications

(21 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Excellent agreement is observed for R152a with the value of 65 Pa measured by Blanke and Weiss [ 16]. The estimated triple-point pressure of ammonia lies between the measurement of McKelvy and Taylor [17] and that of Overstreet and Giauque [18].…”

Section: Triple-point Pressuressupporting

confidence: 57%

“…The extrapolated values below 200 K agree within 1 or 2 Pa with the fundamental equation of state established by Tillner-Roth [30] used as a baseline. The extrapolated values also reveal systematic differences for the vapor pressures of Blanke and Weiss [16] at 160, 170, and 180K.…”

Section: Vapor Pressures and Entlmlpies Of Vaporization Of Refrigerantsmentioning

confidence: 82%

“…The most satisfying result was obtained for R152a (Fig. 4.) Here, the extrapolation was based on the results of Blanke and Weiss [ 16] above 200 K and on those of T/irk et al [29]. The extrapolated values below 200 K agree within 1 or 2 Pa with the fundamental equation of state established by Tillner-Roth [30] used as a baseline.…”

Section: Vapor Pressures and Entlmlpies Of Vaporization Of Refrigerantsmentioning

confidence: 98%

See 2 more Smart Citations

A nonlinear regression analysis for estimating low-temperature vapor pressures and enthalpies of vaporization applied to refrigerants

Tillner‐Roth

1996

Int J Thermophys

View full text Add to dashboard Cite

A new method is presented to extrapolate experimental vapor pressures down to the triple point. The method involves a nonlinear regression analysis based on the Clausius-Clapeyron equation and a simple relation for the enthalpy of vaporization. Triple-point pressures and vapor pressures up to 0.1-0.2 MPa are estimated for R125, R32, R143a, R134a, R152a, R123, R124, and ammonia; they generally agree with available experimental data within their uncertainty. Equations for the enthalpy of vaporization which describe this property fairly well at low temperatures are obtained as a byproduct.

show abstract

Section: Triple-point Pressuressupporting

confidence: 57%

Section: Vapor Pressures and Entlmlpies Of Vaporization Of Refrigerantsmentioning

confidence: 82%

Section: Vapor Pressures and Entlmlpies Of Vaporization Of Refrigerantsmentioning

confidence: 98%

See 1 more Smart Citation

A nonlinear regression analysis for estimating low-temperature vapor pressures and enthalpies of vaporization applied to refrigerants

Tillner‐Roth

1996

Int J Thermophys

View full text Add to dashboard Cite

show abstract

“…Available experimental data for the saturated-vapor densities are very scarce at lower temperatures. Calculated values from the new model for the saturated-liquid densities fall between the data of Wang et al [28] and of Blanke and Weiss [16]. Density deviations over a wide range of single-phase gaseous and liquid states are shown in Fig.…”

Section: Assessmentmentioning

confidence: 87%

“…PVT data in the superheatedvapor phase consist of 20 points of Dressner and Bier [14], 319 points of Tillner-Roth and Baehr [15], and 28 points of Tillner-Roth and Baehr [13]. PVT data in the supercritical region consist of 27 points of Blanke and Weiss [16], 8 points of Dressner and Bier [14], 8 points of Magee [10], 44 points of Tillner-Roth and Baehr [15], and 88 points of Tillner-Roth and Baehr [13].…”

Section: Development Of Thermodynamic Property Modelmentioning

confidence: 99%

A Rigorous Thermodynamic Property Model for Fluid-Phase 1,1-Difluoroethane (R-152a)

Astina

Sato

2004

International Journal of Thermophysics

View full text Add to dashboard Cite

A new thermodynamic property model for the Helmholtz free energy with rational third virial coefficients for fluid-phase 1,1-difluoroethane (R-152a) was developed. The model was validated by existing experimental data for temperatures from the triple point to 450 K and pressures up to 60 MPa. Reasonable behavior of the second and third virial coefficients was confirmed from intermolecular potential models. The estimated uncertainties are 0.1% in density for the gaseous and liquid phases, 0.4% in density for the supercritical region, 0.05% in speed of sound for the gaseous phase, 2% in speed of sound for the liquid phase, and 1% in specific heat capacities for the liquid phase. From the reasonable behavior of the ideal curves and the third virial coefficients, the model can be assumed reliable in representing the thermodynamic properties not only at states with available experimental data but also at states for which no experimental data are available.

show abstract

Backone family of equations of state: 1. Nonpolar and polar pure fluids

Müller

Winkelmann

Fischer³

1996

AIChE Journal

View full text Add to dashboard Cite

Isochoric (p,v,T) Measurements on C2H4F2 (R152a) in the Liquid State from the Triple Point to 450 K and at Pressures up to 30 MPa

Cited by 30 publications

References 1 publication

A nonlinear regression analysis for estimating low-temperature vapor pressures and enthalpies of vaporization applied to refrigerants

A nonlinear regression analysis for estimating low-temperature vapor pressures and enthalpies of vaporization applied to refrigerants

A Rigorous Thermodynamic Property Model for Fluid-Phase 1,1-Difluoroethane (R-152a)

Backone family of equations of state: 1. Nonpolar and polar pure fluids

Contact Info

Product

Resources

About