TY - JOUR
T1 - Measurements of liquid densities of the binary HFC-32 + HFC-134a system
AU - Widiatmo, Januarius V.
AU - Sato, Haruki
AU - Watanabe, Koichi
PY - 1994/8/15
Y1 - 1994/8/15
N2 - Thirty measurements of saturated-liquid density and bubble-point pressure, and twenty-two Pρ{variant}Tx data in the liquid phase of binary HFC-32 + HFC-134a systems have been obtained over a temperature range of 280-340 K. using a magnetic densimeter coupled with metallic bellows. The measurements were performed at compositions of 20, 25, 40, 60 and 80 wt% HFC-32, and pressures up to 3 MPa. The experimental uncertainties of the temperature pressure and density measurements were estimated to be not greater than ±15mk, ±15kPa and ±0.2%, respectively. The uncertainty of composition determination was estimated to be within ±0.30 wt% HFC-32. The purity of the sample was 99.998% for HFC-32 and better than 99.8% for HFC-134a. Comparisons of the measurements with properties calculated from the modified Hankinson-Brobst-Thomson equation proposed by Maezawa et al., and the Peng-Robinson equation of state are also discussed.
AB - Thirty measurements of saturated-liquid density and bubble-point pressure, and twenty-two Pρ{variant}Tx data in the liquid phase of binary HFC-32 + HFC-134a systems have been obtained over a temperature range of 280-340 K. using a magnetic densimeter coupled with metallic bellows. The measurements were performed at compositions of 20, 25, 40, 60 and 80 wt% HFC-32, and pressures up to 3 MPa. The experimental uncertainties of the temperature pressure and density measurements were estimated to be not greater than ±15mk, ±15kPa and ±0.2%, respectively. The uncertainty of composition determination was estimated to be within ±0.30 wt% HFC-32. The purity of the sample was 99.998% for HFC-32 and better than 99.8% for HFC-134a. Comparisons of the measurements with properties calculated from the modified Hankinson-Brobst-Thomson equation proposed by Maezawa et al., and the Peng-Robinson equation of state are also discussed.
KW - Bubble-point pressure
KW - Data
KW - Density
KW - Experiments
KW - PVTx
UR - http://www.scopus.com/inward/record.url?scp=0028481043&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0028481043&partnerID=8YFLogxK
U2 - 10.1016/0378-3812(94)80031-6
DO - 10.1016/0378-3812(94)80031-6
M3 - Article
AN - SCOPUS:0028481043
VL - 99
SP - 199
EP - 207
JO - Fluid Phase Equilibria
JF - Fluid Phase Equilibria
SN - 0378-3812
IS - C
ER -