Experimental study of the speed of sound in liquid and gaseous refrigerant R-407C
S.G. Komarov and S.V. Stankus
Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russia
E-mail: stankus@itp.nsc.ru
Keywords: speed of sound, refrigerant R-407C, vapor, liquid, method of ultrasonic interferometer
Pages: 135–137
Abstract
The speed of sound in liquid
and gaseous refrigerant R-407C
was measured by the method of ultrasonic interferometer in the temperature
range from 293 to 373 K and pressure from 0.05 to 0.5 to 3.7 MPa. The experimental uncertainties of the temperature,
pressure, and speed of sound measurements were estimated to be within ±20 mK, ±4 kPa, and ±(0.1–0.3) %, respectively. The obtained results are
compared with the calculated speed of sound from the fundamental state equation for the Helmholtz free
energy.
DOI: 10.1134/S0869864316010145
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