TY - JOUR

T1 - Measurements of Thermophysical Properties of Ethanol + Hexamethyldisiloxane and Ethanol + Octamethyltrisiloxane Mixtures in the Temperature Range of 293-343 K at 100 kPa

AU - Arnautovic, Zlatan

AU - Zimmermann, Conrad

AU - Hamza, Maya

AU - Heberle, Florian

AU - Kabelac, Stephan

AU - Brüggemann, Dieter

N1 - Funding Information: The authors of this work gratefully acknowledge the financial support provided by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation─Project number: 401366378).

PY - 2023/9/14

Y1 - 2023/9/14

N2 - Due to its advantageous combination of individual properties, the utilization of zeotropic mixtures as working fluids can improve the overall efficiency in various thermodynamic cycle processes, such as organic Rankine cycle processes or Kalina processes. Therefore, the properties such as density, viscosity, and surface tension are measured for ethanol, hexamethyldisiloxane (MM), octamethyltrisiloxane (MDM), and their mixtures ethanol/MM and ethanol/MDM at 100 kPa and at different temperatures (293-343 K) and compositions. The measured fluid properties are investigated with different experimental systems: an IMETER measuring system is used for all three mentioned properties. Additionally, the density is determined by a density meter with an oscillating U-tube and the surface tension by a drop shape analyzer system. For the mixtures of ethanol/MM and ethanol/MDM, neither literature data exist nor distinct mixture parameters in REFPROP v.10.0 are available, but the present experimental results are compared with different mixing rules. Furthermore, specific parameters are developed with the Jouyban-Acree model in order to enable a calculation of the presented thermophysical properties for the given mixtures.

AB - Due to its advantageous combination of individual properties, the utilization of zeotropic mixtures as working fluids can improve the overall efficiency in various thermodynamic cycle processes, such as organic Rankine cycle processes or Kalina processes. Therefore, the properties such as density, viscosity, and surface tension are measured for ethanol, hexamethyldisiloxane (MM), octamethyltrisiloxane (MDM), and their mixtures ethanol/MM and ethanol/MDM at 100 kPa and at different temperatures (293-343 K) and compositions. The measured fluid properties are investigated with different experimental systems: an IMETER measuring system is used for all three mentioned properties. Additionally, the density is determined by a density meter with an oscillating U-tube and the surface tension by a drop shape analyzer system. For the mixtures of ethanol/MM and ethanol/MDM, neither literature data exist nor distinct mixture parameters in REFPROP v.10.0 are available, but the present experimental results are compared with different mixing rules. Furthermore, specific parameters are developed with the Jouyban-Acree model in order to enable a calculation of the presented thermophysical properties for the given mixtures.

UR - http://www.scopus.com/inward/record.url?scp=85171548958&partnerID=8YFLogxK

U2 - 10.1021/acs.jced.3c00336

DO - 10.1021/acs.jced.3c00336

M3 - Article

AN - SCOPUS:85171548958

VL - 68

SP - 2223

EP - 2237

JO - Journal of Chemical and Engineering Data

JF - Journal of Chemical and Engineering Data

SN - 0021-9568

IS - 9

ER -