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TVT, 2019, Volume 57, Issue 4, Pages 634–637 (Mi tvt11139)  

Short Communications

Vapor pressure, speed of sound, and density of the refrigerant mixture R-134a–R227ea in vapor phase

S. G. Komarov, S. V. Stankus

S.S. Kutateladze Institute of Thermophysics, Siberian Division of the Russian Academy of Sciences

Abstract: Using an ultrasonic interferometer and a piezometer of constant volume in the temperature range from $293$ to $373$ K and at pressures from $0.06$ to $0.4$$3.6$ MPa, vapor pressure at the bubble line, speed of sound, and density of the gaseous mixed refrigerant R-134a $(48.66%)$–R-227ea $(51.34%)$ were investigated. Measurement errors of temperature, pressure, speed of sound and density were $\pm20$ mK, $\pm4$ kPa, $\pm(0.1$$0.3)%$ and $\pm(0.2$$0.4)%$, respectively. Approximation dependences of the vapor density and its pressure on the bubble lines were obtained. Experimental data were compared with calculations by the REFPROP program.
Author to whom correspondence should be addressed

DOI: https://doi.org/10.1134/S0040364419040124

Full text: PDF file (258 kB)
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English version:
High Temperature, 2019, 57:4, 596–599

Bibliographic databases:

UDC: 534.22 + 536.411
Received: 23.11.2018
Revised: 25.12.2018
Accepted:25.12.2018

Citation: S. G. Komarov, S. V. Stankus, “Vapor pressure, speed of sound, and density of the refrigerant mixture R-134a–R227ea in vapor phase”, TVT, 57:4 (2019), 634–637; High Temperature, 57:4 (2019), 596–599

Citation in format AMSBIB
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\paper Vapor pressure, speed of sound, and density of the refrigerant mixture R-134a--R227ea in vapor phase
\jour TVT
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\issue 4
\pages 634--637
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\crossref{https://doi.org/10.1134/S0040364419040124}
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\jour High Temperature
\yr 2019
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\pages 596--599
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