Measurements and New Vapor Pressure Correlation for HFO-1234ze(E)

Abstract

The vapor pressure of HFO-1234ze(E) (trans-1,3,3,3-tetrafluoropropene) was measured from 235 to 381 K for pressures from 40 to 3493 kPa using a Burnett apparatus. The temperature measurement uncertainty was estimated to be 2.3 mK, and the pressure uncertainty was estimated to be 600 Pa. A Wagner-type equation was used to correlate the vapor pressure of HFO-1234ze(E) based on the experimental data. This vapor equation has five coefficients and correlates the vapor pressure data of this work with a maximum relative deviation of 0.00082.

Measurements of Critical Properties of the Binary Mixture of 1,1,1-Trifluoroethane (HFC-143a) + trans-1,3,3,3-Tetrafluoropropene (HFO-1234ze(E))

“…When compared to the data obtained from REFPROP 9.1, the average absolute relative deviations (AARDs) were 0.32, 0.23, and 0.28% for HFC-134a, HFC-143a, and HFO-1234ze­(E), respectively. The vapor pressures in this work combined with the values obtained from the literature ,,− were correlated by a Wagner-type equation. The functional form of the Wagner-type equation is given by The comparison between experimental data and the values calculated by the Wagner-type equation is also shown in Table , and the parameters of the Wagner-type equation are listed in Table .…”

“…trans -1,3,3,3-Tetrafluoropropene (HFO-1234ze­(E)) has been considered as a promising alternative to 1,1,1,2-tetrafluoroethane (HFC-134a) in recent years due to its low global warming potential (GWP) and zero ozone depletion potential (ODP). Research on its thermophysical properties has attracted a lot of attention, and equations of state for HFO-1234ze­(E) have been established. − However, HFO-1234ze­(E) has a lower coefficient of performance (COP) and a lower volumetric refrigeration capacity than HFC-134a, which is mainly caused by the low evaporating pressure and small vaporization enthalpy of HFO-1234ze­(E). To offset these drawbacks, mixtures composed of HFO-1234ze­(E) with HFCs or HCs have been proposed and some VLE and pvTx properties have been investigated. − 1,1,1-Trifluoroethane (HFC-143a) has higher vapor pressures than HFO-1234ze­(E) and was mainly used as a component of R404A (0.44 HFC-125 + 0.04 HFC-134a + 0.52 HFC-143a by mass) and R507A (0.5 HFC-125 + 0.5 HFC-143a by mass). − Moreover, HFC-143a has the potential to be used as a solvent in supercritical extraction because of its low critical temperature and chemical stability, but it was hardly used as a pure refrigerant individually because of its high GWP of 4470 .…”

pvT Property of HFO-1234ze(E) in the Gaseous Phase

“…A detailed description of the chemical composition measurements and methods to improve the purity were introduced in the previous work. 19 Apparatus. The experiment on the HFO-1234ze(E) pvT property was conducted with a Burnett apparatus, and the system apparatus has been shown in Figure 1.…”

“…The HFO-1234ze­(E) sample in this work is the same batch and purchased from the same company used with a previous work, and the information is listed in Table . A detailed description of the chemical composition measurements and methods to improve the purity were introduced in the previous work …”

“…Experiment is an important method to acquire the working fluids’ pvT properties precisely. With regard to HFO-1234ze­(E), the critical temperature is reported as 382.52 or 382.51 K from the literature. − Therefore, this fluid will probably be applied in transcritical cycles, especially for ORCs. Thus, the gaseous pvT data around the HFO-1234ze­(E) critical temperature is especially important.…”