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The speed of sound in vapor phase refrigerant R-134a (57.24 wt.%)−R-227ea (42.76 wt.%)

The speed of sound in vapor phase refrigerant R-134a (57.24 wt.%)−R-227ea (42.76 wt.%) The speed of sound of the gaseous mixed refrigerant R-134a (57.24 wt.%) - R-227ea (42.76 wt. %) was investigated by the method of ultrasonic interferometer in the temperature range from 293 to 373 K and at pressures from 0.08 to 0.97 MPa. The measurement errors of temperature, pressure, and speed of sound were ±20 mK, ±4 kPa, and ±(0.20-0.35) %, respectively. Approximation dependences of the speed of sound on five isotherms have been obtained, and the experimental data have been compared with calculations using the REFPROP program. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Thermophysics and Aeromechanics Springer Journals

The speed of sound in vapor phase refrigerant R-134a (57.24 wt.%)−R-227ea (42.76 wt.%)

Thermophysics and Aeromechanics , Volume 26 (4) – Nov 26, 2019

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Publisher
Springer Journals
Copyright
Copyright © 2019 by S.G. Komarov and S.V. Stankus
Subject
Physics; Thermodynamics
ISSN
0869-8643
eISSN
1531-8699
DOI
10.1134/S0869864319040139
Publisher site
See Article on Publisher Site

Abstract

The speed of sound of the gaseous mixed refrigerant R-134a (57.24 wt.%) - R-227ea (42.76 wt. %) was investigated by the method of ultrasonic interferometer in the temperature range from 293 to 373 K and at pressures from 0.08 to 0.97 MPa. The measurement errors of temperature, pressure, and speed of sound were ±20 mK, ±4 kPa, and ±(0.20-0.35) %, respectively. Approximation dependences of the speed of sound on five isotherms have been obtained, and the experimental data have been compared with calculations using the REFPROP program.

Journal

Thermophysics and AeromechanicsSpringer Journals

Published: Nov 26, 2019

References