Vapour-liquid equilibrium data for the 1,1,1,2 tetrafluoroethane (R134a)+dimethyl ether (DME) system at temperatures from 293.18 to 358.15 K and pressures up to about 3 MPa

被引：35

作者：

Valtz, A ^{[1
]}

Gicquel, L ^{[1
]}

Coquelet, C ^{[1
]}

Richon, D ^{[1
]}

机构：

[1] CNRS, Ctr Energet & Proc, Ecole Natl Super Mines, CEP,TEP, F-77305 Fontainebleau, France

来源：

FLUID PHASE EQUILIBRIA | 2005年 / 230卷 / 1-2期

关键词：

VLE data; high pressures; refrigerants; modelling; azeotrope; 1,1,1,2 tetrafluoroethane (R134a); dimethyl ether (DME);

D O I：

10.1016/j.fluid.2005.01.001

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Isothermal vapour-liquid equilibrium data have been measured for the binary system R134a + DME at five temperatures between 293.18 and 358.15 K, and pressures between 0.4899 and 2.9442 MPa. The peculiarity of this system is the existence of an azeotrope with a minimum pressure, which disappears at 358.15 K. The experimental method used in this work is of the static-analytic type, taking advantage of two pneumatic capillary samplers (RolSi (TM), Armines' patent) developed in the CENERG/TEP Laboratory. The data were obtained with uncertainties within +/- 0.02 K, +/- 0.0001 MPa and +/- 1% for molar compositions. The isothermal P, x, y data are well represented with the Redlich and Kwong equation of state using the Mathias-Copeman alpha function and the Huron-Vidal mixing rules involving the NRTL model. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：184 / 191

页数：8

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