TY - JOUR
T1 - Improved equation of state for R-134a
AU - Piao, C. C.
AU - Noguchi, M.
AU - Sato, H.
AU - Watanabe, K.
PY - 1994/12/1
Y1 - 1994/12/1
N2 - An 18-coefficient, modified Benedict-Webb-Rubin equation of state for R-134a (1,1,1,2-tetrafluoroethane) has been developed. New correlations of vapor pressure and saturated liquid density are also presented. The temperature scale in this paper is given in the new International Temperature Scale of 1990 (ITS-90). This equation of state has been developed based on the experimental data of PVT properties, saturation properties, and isochoric heat capacities by using a least-squares fitting. The experimental data of isobaric heat capacities, speed of sound, and second virial coefficients were also taken into consideration as secondary data. This equation of state is effective both in the super-heated gaseous phase and the compressed liquid phase at pressures up to 70 MPa, densities to 1,600 kg/m3, and temperatures from 180 K to 500 K.
AB - An 18-coefficient, modified Benedict-Webb-Rubin equation of state for R-134a (1,1,1,2-tetrafluoroethane) has been developed. New correlations of vapor pressure and saturated liquid density are also presented. The temperature scale in this paper is given in the new International Temperature Scale of 1990 (ITS-90). This equation of state has been developed based on the experimental data of PVT properties, saturation properties, and isochoric heat capacities by using a least-squares fitting. The experimental data of isobaric heat capacities, speed of sound, and second virial coefficients were also taken into consideration as secondary data. This equation of state is effective both in the super-heated gaseous phase and the compressed liquid phase at pressures up to 70 MPa, densities to 1,600 kg/m3, and temperatures from 180 K to 500 K.
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M3 - Conference article
AN - SCOPUS:0028728584
VL - 100
SP - 358
EP - 366
JO - ASHRAE Transactions
JF - ASHRAE Transactions
SN - 0001-2505
IS - 1
T2 - Proceedings of the ASHRAE Winter Meeting
Y2 - 23 January 1994 through 26 January 1994
ER -