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Compressed liquid density and speed of sound measurements and correlation of the binary mixture {carbon dioxide (CO2) + 1,1-difluoroethene (R1132a)} at temperatures from 220 K to 350 K.
Number: 0173
Author(s) : MENEGAZZO D., ROWANE A. J., FEDELE L., BOBBO S., LOMBARDO G., MCLINDEN M. O.
Summary
The blend of carbon dioxide and R1132a has been suggested as a feasible alternative to R23 in low-temperature devices. In this work, we present new experimental data for compressed-liquid density, vapour density and compressed-liquid speed of sound for the binary system CO2 + R1132a by means of a two-sinker densimeter and a pulse-echo-type instrument, respectively. The measurements cover the temperature range of 220 K to 350 K with pressures to 30 MPa for density; the speed of sound measurements cover the range 230 K to 350 K with pressures to 55 MPa; for both properties two mixture compositions were measured. Finally, we present an Equation of State (EoS) correlation for the experimental data based on a Helmholtz free energy model, which shows a good agreement with the measurements. The mixture strongly absorbed the sound pulse, and the usual dual-path analysis was not possible; thus, we developed a method using only the short-path signal.
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Details
- Original title: Compressed liquid density and speed of sound measurements and correlation of the binary mixture {carbon dioxide (CO2) + 1,1-difluoroethene (R1132a)} at temperatures from 220 K to 350 K.
- Record ID : 30031580
- Languages: English
- Subject: Technology
- Source: Proceedings of the 26th IIR International Congress of Refrigeration: Paris , France, August 21-25, 2023.
- Publication date: 2023/08/21
- DOI: http://dx.doi.org/10.18462/iir.icr.2023.0173
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Indexing
-
Themes:
CO2;
HFO et HCFO;
Blends;
Thermodynamic measurements - Keywords: Binary mixture; R744; Expérimentation; CO2; R1132a; HFO; Equation of state; Sound velocity; Modelling; Thermodynamic property
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