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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20303 - Thermodynamics

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

International Journal of Refrigeration

ISSN

0140-7007

e-ISSN

1879-2081

Svazek periodika

171

Číslo periodika v rámci svazku

March

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

11

Strana od-do

191-201

Kód UT WoS článku

001407232200001

EID výsledku v databázi Scopus

2-s2.0-85215401399