The isochoric specific heat capacity for R1234ze(E) at temperatures from (237 to 349) K and pressures up to 9.2 MPa

Abstract

In this work, the isochoric specific heat capacity (cv) of trans-1,3,3,3-tetrafluoropropene (R1234ze(E)) in the compressed liquid states were measured using an adiabatic batch calorimeter. The temperatures ranged from (237 to 349) K and pressures up to 9.2 MPa. Measurements were obtained for a total of 112 state conditions on 22 pseudo-isochores. The standard uncertainties of temperatures, pressures and isochoric specific heat capacities were estimated to be 12 mK, 5 kPa and 0.98%, respectively. The experimental cv values for R1234ze(E) are compared with three equations, including two Helmholtz equations of state (EOSs) and a generalized equation based on corresponding state principle. The data in this work show good agreement, and the average absolute relative deviations are 1.37%, 1.27% and 1.59% for the above three equations, respectively.