Thermodynamic Properties of Halogenated Ethanes and Ethylenes

Mears, Whitney H.; Stahl, Richard F.; Orfeo, S. Robert; Shair, R.C.; Kells, Lyman F.; Thompson, Walter; McCann, Harold

doi:10.1021/ie50547a052

Cited by 101 publications

(49 citation statements)

References 1 publication

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“…from virials of Gillis 12 (1995)d Higashi 1 (1987 Holcomb 9 (1993) IS029 (1989) Tamatsll 33 (1992) Wang 29 (1992) Zha0 36 (1992) Overall Ideal gas heat capacity Chen l2 (1975) Gillis ll (1995) Hozumi-l O (1993) Mears 28 [8.469] chosen over that of Higashi et al 1 because upon extrapolation the majority of the experimental vapor pressure data exhibited a trend towards the Tillner-Roth 2 value at the critical point.) Table 2 lists the reported saturation data and the ideal gas heat capacity data.…”

Section: Experimental Datamentioning

confidence: 99%

A Modified Benedict–Webb–Rubin Equation of State for the Thermodynamic Properties of R152a (1,1-difluoroethane)

Outcalt¹,

McLinden²

1996

Journal of Physical and Chemical Reference Data

104

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Isentrope energy, Hugoniot temperature, and the Mie-Gruneisen equation of state AIP Conf.A modified Benedict-Webb-Rubin (MBWR) equation of state has been developed for R152a (l,I-diftuoroethane). The correlation is based on a selection of available experimental thermodynamic property data. Single-phase pressure-volume-temperature (PV1), heat capacity, and sound speed data, as well as second virial coefficient, vapor pressure, and saturated liquid and saturated vapor density data, were used with multi-property linear least-squares fitting to determine the 32 adjustable coefficients of the MBWR equation. Ancillary equations representing the vapor pressure, saturated liquid and saturated vapor densities, and the ideal gas heat capacity were determined.Coefficients for the equation of state and the ancillary equations are given. Experimental data used in this work covered temperatures from 162 K to 453 K and pressures to 35 MPa. The MBWR equation established in this work may be used to predict thermodynamic properties of R152a from the triple-point temperature of 154.56 K to 500 K and for pressures up to 60 MPa except in the immediate vicinity of the critical point.

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Section: Experimental Datamentioning

confidence: 99%

A Modified Benedict–Webb–Rubin Equation of State for the Thermodynamic Properties of R152a (1,1-difluoroethane)

Outcalt¹,

McLinden²

1996

Journal of Physical and Chemical Reference Data

104

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“…This type of instrument was used in several other studies over the next 46 years. However, while the viscosity results of Edward and Bonilla were confirmed within their estimated uncertainty of 3 % to 5 %, the later measurement results for halogenated hydrocarbons of Mears et al [ 3 ], Phillips and Murphy [ 4 , 5 ], and Shankland et al [ 6 , 7 ] were burdened with systematic errors of up to 33 %, the origin of which was not identified before another decade had passed.…”

Section: Introductionmentioning

confidence: 91%

Sealed Gravitational Capillary Viscometry of Dimethyl Ether and Two Next-Generation Alternative Refrigerants

Cousins¹,

Laesecke²

2012

J. Res. Natl. Inst. Stand. Technol.

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The viscosities of dimethyl ether (DME, C2H6O) and of the fluorinated propene isomers 2,3,3,3-tetrafluoroprop-1-ene (R1234yf, C3H2F4) and trans-1,3,3,3-tetrafluoropropene (R1234ze(E)) were measured in a combined temperature range from 242 K to 350 K at saturated liquid conditions. The instrument was a sealed gravitational capillary viscometer developed at NIST for volatile liquids. Calibration and adjustment of the instrument constant were conducted with n-pentane. The repeatability of the measurements was found to be approximately 1.5 %, leading to a temperature-dependent estimated combined standard uncertainty of the experimental data between 5.7 % at 242 K for dimethyl ether and 2.6 % at 340 K for R1234yf. The measurements were supplemented by ab initio calculations of the molecular size, shape, and charge distributions of the measured compounds. The viscosity results for dimethyl ether were compared with literature data. One other data set measured with a sealed capillary viscometer and exceeding the present results by up to 7 % could be reconciled by applying the vapor buoyancy correction. Then, all data agreed within the estimated uncertainty of the present results. Viscosities for the fluorinated propene isomers deviate up to 4 % from values predicted with the NIST extended corresponding-states model. The viscosities of the two isomers do not scale with their dipole moments. While the measured viscosity of R1234ze(E) with the lower dipole moment is close to that of R134a, the refrigerant to be replaced, that of R1234yf with the higher dipole moment is up to 25 % lower. The viscosity of dimethyl ether is compared with those of water and methanol.

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“…The RMS error for the vapor volume ranged from 0.14 to 1.16 percent with an average of 0.50 percent. These differences are on the same order as the accuracy to which the corresponding experimental quantities are known (for example, see Mears et al (1955)).…”

Section: Pure Refrigerantsmentioning

confidence: 99%

Application of a hard sphere equation of state to refrigerants and refrigerant mixtures

Morrison¹

1987

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Thermodynamic Properties of Halogenated Ethanes and Ethylenes

Cited by 101 publications

References 1 publication

A Modified Benedict–Webb–Rubin Equation of State for the Thermodynamic Properties of R152a (1,1-difluoroethane)

A Modified Benedict–Webb–Rubin Equation of State for the Thermodynamic Properties of R152a (1,1-difluoroethane)

Sealed Gravitational Capillary Viscometry of Dimethyl Ether and Two Next-Generation Alternative Refrigerants

Application of a hard sphere equation of state to refrigerants and refrigerant mixtures

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