Density and surface tension of water + ethylene glycol mixtures as key components of heat transfer liquids

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F25%3A00604736" target="_blank" >RIV/61388998:_____/25:00604736 - isvavai.cz</a>

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S0140700725000040?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0140700725000040?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ijrefrig.2025.01.004" target="_blank" >10.1016/j.ijrefrig.2025.01.004</a>

Result language

angličtina

Original language name

Density and surface tension of water + ethylene glycol mixtures as key components of heat transfer liquids

Original language description

Mixtures of water and ethylene glycol form the basis of many important heat transfer fluids widely used in refrigeration, automotive and other thermal management applications. In this work, new accurate density and surface tension experimental data at 0.1 MPa for water + ethylene glycol mixtures were obtained over the entire composition range. Complementary experimental techniques were employed, including the vibrating tube densimeter and the single sinker buoyancy method for the density and the Wilhelmy plate method and the capillary rise technique for the surface tension. By using unique experimental apparatus of own design, the surface tension of the binary mixture was measured for the first time also at temperatures below the equilibrium freezing point, i.e. under the supercooled metastable state. The temperature trend of water + ethylene glycol surface tension does not indicate any anomaly down to 243 K on the contrary to pure water (Vins et al., 2020, J. Phys. Chem. Lett. 11, 4443). Based on new measurements and literature data, new correlations were developed for density and surface tension both for pure ethylene glycol and the water + ethylene glycol mixture. The Rackett-type correlation represents the saturated liquid density in the temperature range from 260 K up to the critical point of 719 K. A modified Redlich-Kister correlation of the excess molar volume can be used for the calculation of mixture density over the full composition range at temperatures from 240 K to 380 K. Anew correlation has been developed for the surface tension of pure ethylene glycol by considering the universal critical exponent mu = 1.26, guaranteeing physically correct temperature trend in the vicinity of the critical point. The models by Connors and Wright (1989, Anal. Chem. 61, 194) and Wang et al. (2011, Ind. Eng. Chem. Res. 50, 4086) were slightly readjusted and found to give comparably good predictions for the surface tension of water + ethylene glycol mixture.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20303 - Thermodynamics

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

International Journal of Refrigeration

ISSN

0140-7007

e-ISSN

1879-2081

Volume of the periodical

171

Issue of the periodical within the volume

March

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

11

Pages from-to

191-201

UT code for WoS article

001407232200001

EID of the result in the Scopus database

2-s2.0-85215401399