Solubility of 1,1,1,2-Tetrafluoroethane in Triethylene Glycol Dimethyl Ether

Coronas, Alberto; Mainar, Ana M.; Patil, K.R.; Conesa, A.; Shen, and Shubao; Zhu, Shemin

doi:10.1021/je010193l

Cited by 21 publications

(35 citation statements)

References 12 publications

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“…Also these experimental points are represented with an acceptable accuracy by the model, even if the deviations are higher than those for the data given in the present work. From the results obtained, it can be concluded that there is good agreement between the new measurements and the literature data from reference [3]. The activity coefficient values, obtained from the present experimental data and calculated from the Wilson model, are shown in figure 4.…”

Section: Data Correlationsupporting

confidence: 80%

“…Coronas et al [3], in their work for the same mixture at similar temperatures and over similar composition ranges, stated that all the activity coefficients for R134a under their experimental conditions are less than 1. This is an evident disagreement with the behaviour found here.…”

Section: Data Correlationmentioning

confidence: 95%

“…In figure 2 the calculated isothermal lines at the same temperatures of the data are reported; the accuracy of the representation is evidenced by the plot. The obtained Wilson model has been applied also to the available literature data of Coronas et al [3] for the same system; only the points with R134a mole fraction greater than 0.65 in the liquid phase have been considered to avoid an excessive extrapolation from the range covered by the present data. The data by Coronas et al figure 3, while the validation results for such a data set are given in table 3.…”

Section: Data Correlationmentioning

confidence: 99%

“…The polyalkylene glycols (PAGs) have been proposed as suitable lubricants for R134a and several researchers have focused their attention on such mixtures, for which measurements of solubility [1][2][3][4][5], density [6][7][8][9], and viscosity [6,[10][11][12] have been obtained. A technical lubricant is usually a mixture of several components sharing a same chemical structure, e.g., PAGs, in which few of them are prevailing in composition; some additives are furthermore added to this mixture.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Bubble pressure measurements for the (1,1,1,2-tetrafluoroethane+triethylene glycol dimethyl ether) system

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The Journal of Chemical Thermodynamics

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Section: Data Correlationsupporting

confidence: 80%

Section: Data Correlationmentioning

confidence: 95%

Section: Data Correlationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Bubble pressure measurements for the (1,1,1,2-tetrafluoroethane+triethylene glycol dimethyl ether) system

Marchi

Scalabrin

Ihmels³

et al. 2006

The Journal of Chemical Thermodynamics

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“…However, in spite of their importance, there are only a few studies available in the literature on the thermophysical properties of the HFC-134a + PGDME system [2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Viscosity measurements and correlations of binary mixtures: 1,1,1,2-tetrafluoroethane (HFC-134a)+tetraethylene glycol dimethylether (TEGDME)

Monsalvo¹,

Baylaucq

Reghem

et al. 2005

Fluid Phase Equilibria

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A fundamental equation of state for the (R134a + triethylene glycol dimethyl ether) mixture

Marchi

Scalabrin

Ihmels³

et al. 2007

AIChE Journal

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in Wiley InterScience (www.interscience.wiley.com).The thermodynamic properties of the mixture of 1,1,1,2-tetrafluoroethane (R134a) and triethylene glycol dimethyl ether (TriEGDME) have been modeled with equations of state in an extended corresponding states format. A recent equation of state for pure R134a was assumed as the reference while the scale factors have been obtained in neural network form by regression of experimental data for the mixture. The modeling was focused on the liquid phase, considering the possible application of such a mixture in a refrigeration plant; since the vapor pressure of pure TriEGDME is negligible over the considered temperature range, the vapor phase of the mixture at vapor-liquid equilibrium condition is almost pure R134a. Two fundamental equations are proposed herein. The first one, developed from a limited amount of experimental data is valid for R134a mole fractions greater than 0.94. The second equation was obtained from a wider data base; it has a larger number of free parameters to regress and covers the R134a mole fractions greater than 0.59. 2007 American Institute of Chemical Engineers AIChE J, 53: [1349][1350][1351][1352][1353][1354][1355][1356][1357][1358][1359][1360][1361] 2007 Keywords: extended corresponding states, neural networks, R134a, refrigerant þ lubricant mixtures, thermodynamic properties, TriEGDME IntroductionThe environmental problems connected with the use of chlorofluorocarbon (CFC) refrigerants, in particular the depletion of the stratospheric layer of ozone, have imposed the phase-out of such substances and their replacement with less harmful fluids. Consequently, the study of alternative refrigerants and of their properties has become a fundamental task for scientific and technical research.Nowadays, the fluids mainly used in the refrigeration and air-conditioning plants are hydrofluorocarbons (HFC) that show better environmental behavior, thanks to the absence of chlorine atoms in their molecules. Among the substances of this family, 1,1,1,2-tetrafluoroethane (R134a) is widely used, because of its favorable thermodynamic performances in compression cycles and its compatibility with the existing refrigeration plants designed for CFC refrigerants.The identification of a suitable alternative refrigerant does not completely solve the technical problem: in fact, in the compression plants, the working fluid is not a pure refrigerant (or a mixture of refrigerants), but a certain amount of lubricant, compatible and soluble with the refrigerant, must be added. Because the mineral oils that were used with CFCs for years show low solubility in HFC refrigerants, it is necessary to propose alternative lubricants. The problems posed by the selection of the lubricant have been widely studied in recent years; a partial review is given by Marsh and Kandil.1 Guidance for the choice of the most efficient lubricant for specific technical applications, as for instance the design of a refrigeration plant, requires the knowledge of the thermophysical properties of t...

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Solubility of 1,1,1,2-Tetrafluoroethane in Triethylene Glycol Dimethyl Ether

Cited by 21 publications

References 12 publications

Bubble pressure measurements for the (1,1,1,2-tetrafluoroethane+triethylene glycol dimethyl ether) system

Bubble pressure measurements for the (1,1,1,2-tetrafluoroethane+triethylene glycol dimethyl ether) system

Viscosity measurements and correlations of binary mixtures: 1,1,1,2-tetrafluoroethane (HFC-134a)+tetraethylene glycol dimethylether (TEGDME)

A fundamental equation of state for the (R134a + triethylene glycol dimethyl ether) mixture

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