TY - JOUR
T1 - Thermodynamic properties of hydrofluoroolefin (R1234yf and R1234ze(E)) refrigerant mixtures
T2 - density, vapour-liquid equilibrium, and heat capacity data and modelling
AU - Al Ghafri, Saif ZS
AU - Rowland, Darren
AU - Akhfash, Masoumeh
AU - Arami-Niya, Arash
AU - Khamphasith, Martin
AU - Xiao, Xiong
AU - Tsuji, Tomoya
AU - Tanaka, Yukio
AU - Seiki, Yoshio
AU - May, Eric F.
AU - Hughes, Thomas J.
PY - 2019/2/1
Y1 - 2019/2/1
N2 - Liquid-phase and vapour-phase densities are reported for the binary refrigerant mixtures (R125 + R1234ze(E)), (R134a + R1234ze(E)), (R143a + R1234ze(E)), (R1234ze(E) + R1234yf), (R125 + R1234yf), (R143a + R1234yf) and (R125 + R152a). The measurements span temperatures from (252 to 294) K and pressures from (0.8 to 4.2) MPa. Vapour-liquid equilibria (VLE) and liquid isobaric heat capacities are also reported for some mixtures. These measurements and previously published data were used to tune binary interaction parameters in existing Helmholtz energy models. Significant improvements in the predicted densities were achieved, for example the root mean squared relative deviation decreased from 0.33% to 0.021% for (R143a + R1234yf). The most significant improvement in the description of VLE occurred for (R1234yf + R1234ze(E)) where the root mean squared deviation in the predicted vapour phase compositions decreased from 0.010 to 0.00084 (a factor of 12).
AB - Liquid-phase and vapour-phase densities are reported for the binary refrigerant mixtures (R125 + R1234ze(E)), (R134a + R1234ze(E)), (R143a + R1234ze(E)), (R1234ze(E) + R1234yf), (R125 + R1234yf), (R143a + R1234yf) and (R125 + R152a). The measurements span temperatures from (252 to 294) K and pressures from (0.8 to 4.2) MPa. Vapour-liquid equilibria (VLE) and liquid isobaric heat capacities are also reported for some mixtures. These measurements and previously published data were used to tune binary interaction parameters in existing Helmholtz energy models. Significant improvements in the predicted densities were achieved, for example the root mean squared relative deviation decreased from 0.33% to 0.021% for (R143a + R1234yf). The most significant improvement in the description of VLE occurred for (R1234yf + R1234ze(E)) where the root mean squared deviation in the predicted vapour phase compositions decreased from 0.010 to 0.00084 (a factor of 12).
KW - Density
KW - Heat capacity
KW - Hydrofluoroolefins
KW - Vapour-liquid equilibrium
UR - http://www.scopus.com/inward/record.url?scp=85058055730&partnerID=8YFLogxK
U2 - 10.1016/j.ijrefrig.2018.10.027
DO - 10.1016/j.ijrefrig.2018.10.027
M3 - Article
AN - SCOPUS:85058055730
SN - 0140-7007
VL - 98
SP - 249
EP - 260
JO - International Journal of Refrigeration
JF - International Journal of Refrigeration
ER -