Open AccessDensity and speed of sound in refrigerant vapor R-125 (31 wt. %) + R-134A (69 wt. %)
Author(s) -
S. G. Komarov,
С. В. Станкус
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2057/1/012105
Subject(s) - refrigerant , speed of sound , piezometer , volume (thermodynamics) , materials science , thermodynamics , atmospheric temperature range , vapor pressure , sound (geography) , constant (computer programming) , analytical chemistry (journal) , acoustics , chemistry , physics , chromatography , geology , computer science , geotechnical engineering , gas compressor , programming language , aquifer , groundwater
Using a constant volume piezometer and ultrasonic interferometer methods, the density and speed of sound in gaseous mixture R-125 (31 wt. %) + R-134a (69 wt. %) were measured within the temperature range from 293 to 393 K and at pressure from 0.18…0.47 to 2.5 MPa. The errors in the measuring temperature, pressure, density and speed of sound were ±20 mK, ±4 kPa, ± (0.15–0.3) %, ± (0.1–0.2) %, respectively. It was shown that the speed of sound values increase with temperature and decrease with pressure. The obtained results were compared with the calculations using the REFPROP software.