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Gruzdev, V. A.; Khairulin, R. A.; Komarov, S. G.; Stankus, S. V.

doi:10.1023/a:1015471624752

Cited by 34 publications

(20 citation statements)

References 4 publications

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“…This value is in good agreement with ρ C = 563 ± 3 kg · m −3 [1] The data for the density of the liquid and vapor phases along the coexistence curve obtained by the gamma method were fitted by the following equation [5]:…”

Section: Densities Of Vapor and Liquid On Saturation Linesupporting

confidence: 72%

“…The methods used for measurement of the thermal properties have been described in previous publications [5][6][7]. The saturated vapor pressure (P S ) and the density (ρ v ) of the superheated vapor were measured with an isochoric piezometer of 439.35 cm 3 capacity.…”

Section: Methodsmentioning

confidence: 99%

“…The main impurity was HFC-245 (0.3 mol%). Before the experiments were initiated, the initial product was purified by removing water and volatile components [5].…”

Section: Methodsmentioning

confidence: 99%

“…2. The temperature dependences of B 2 for HFC-227ea [5,8] and propane [9] are also given. Since the molecules of R-227ea and R-236ea have considerable Fig.…”

Section: Vapor Densitiesmentioning

confidence: 99%

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Thermodynamic Properties of HFC-236ea

et al. 2008

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The density of gaseous and liquid 1,1,1,2,3,3-hexafluoropropane (HFC-236ea) and the speed of sound in liquid HFC-236ea have been studied by a γ -attenuation technique, an ultrasonic interferometer, and an isochoric piezometer method over the temperature range of 263-423 K at pressures up to 4.05 MPa. The purity of the samples used throughout the measurements is 99.68 mol%. The pressures of the saturated vapor were measured over the same temperature range. The experimental uncertainties of the temperature, pressure, density, and speed-of-sound measurements were estimated to be within ±20 mK, ±1.5 kPa, ±(0.05-0.30)%, and ±(0.05-0.10)%, respectively.

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Section: Densities Of Vapor and Liquid On Saturation Linesupporting

confidence: 72%

Section: Methodsmentioning

confidence: 99%

“…The main impurity was HFC-245 (0.3 mol%). Before the experiments were initiated, the initial product was purified by removing water and volatile components [5].…”

Section: Methodsmentioning

confidence: 99%

“…2. The temperature dependences of B 2 for HFC-227ea [5,8] and propane [9] are also given. Since the molecules of R-227ea and R-236ea have considerable Fig.…”

Section: Vapor Densitiesmentioning

confidence: 99%

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Thermodynamic Properties of HFC-236ea

et al. 2008

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“…Instrumental errors of the pressure and temperature measurements were the same as in the vapor-density experiments. A detailed description of the measurement method and the experimental setup has been given in the previous publications [3,4]. To estimate the instrumental error in the measurements of the speed of sound, we made performance test measurements on pure argon.…”

Section: Methodsmentioning

confidence: 99%

Vapor Pressure, Speed of Sound, and PVT-Properties of R-404a in the Vapor Phase

2008

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The density (300-363 K, up to 3.5 MPa) and speed of sound in gaseous R-404a have been studied by an isochoric piezometer method and an ultrasonic interferometer, respectively. The pressures of the saturated vapor along the dew line were measured from 298 to 330 K. The experimental uncertainties of the temperature, pressure, density, and speed-of-sound measurements were estimated to be within ±20 mK, ±1.5 kPa, ±0.15%, and ±(0.1-0.2)%, respectively. On the basis of the obtained data, the isobaric molar heat capacity of R-404a was calculated for the ideal-gas state. An eight-coefficient Benedict-Webb-Rubin equation of state has been developed for the gaseous phase of R-404a.

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Properties of Perfluorobenzene near the Critical Point

Stankus

Khairulin

2006

Int J Thermophys

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The density of vapor and liquid perfluorobenzene along the liquid-vapor coexistence curve has been studied by a gamma-ray attenuation technique over the temperature range from 299 to 517 K. According to measurements, the coordinates of the critical point are T C = 516.66 ± 0.05 K and ρ C = 550.5 ± 2 kg · m −3 . The critical exponent β of the coexistence curve equals 0.343 ± 0.005, which agrees closely with the non-classical value. The results of our measurements were compared with data available in the literature. The height dependence of the density of a two-phase sample was investigated in relation to the temperature and time. These experiments made it possible to determine the isothermal compressibility of liquid and vapor phases near the critical point.

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Cited by 34 publications

References 4 publications

Thermodynamic Properties of HFC-236ea

Thermodynamic Properties of HFC-236ea

Vapor Pressure, Speed of Sound, and PVT-Properties of R-404a in the Vapor Phase

Properties of Perfluorobenzene near the Critical Point

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