The thermodynamic properties of a hydrofluoro-olefin (HFO) refrigerant are presented. The p-ρ-T behavior of high-purity (99.993 %) R1234ze(E) was measured from 240 K to 420 K with pressures to 15 MPa using a two-sinker densimeter. The measurements extend from low-density vapor to compressed-liquid states. Vapor pressures were measured in the densimeter from 261 K to 380 K. The equation of state (EOS) for R1234ze(E) is expressed in terms of the Helmholtz energy as a function of temperature and density, and it is valid over the entire fluid surface. The formulation can be used for the calculation of all thermodynamic properties. Comparisons to experimental data are given to establish the accuracy of the EOS.
Proceedings Title: International Refrigeration and Air Conditioning Conference, Purdue
Conference Dates: July 12-15, 2010
Conference Location: Purdue, IN
Pub Type: Conferences
equation of state, experimental measurements, hydrofluro-olefin, pressure-density-temperature properties, R1234ze(E), refrigerant, thermodynamic properties, vapor pressure