Abstract
In this paper, 182 pvTz data (28 data in the two-phase region and 154 data in the superheated vapor region) of mixtures containing difluoromethane (R32) and trans-1,3,3,3-tetrafluoroprop-1-ene (R12...
Highlights
The heating, ventilation, air conditioning, & refrigeration (HVAC&R) industry has taken steps to combat its direct contributions to climatic issues such as global warming through the reduction and phase-out of high global warming potential (GWP) refrigerants which include hydrofluorocarbons (HFCs)
The results obtained by comparing the measured data with the values given by different models and the experimental data collected from the open literature are reported
The measured vapor phase pvTz of the R32 + R1234ze(E) binary system was correlated with Carnahan−Starling−De Santis (CSD) equations of state (EoSs),[28] PR EoS,[30] the cubic EoS proposed by Stryjek,[31,32] and a virial EoS truncated at the second order
Summary
The heating, ventilation, air conditioning, & refrigeration (HVAC&R) industry has taken steps to combat its direct contributions to climatic issues such as global warming through the reduction and phase-out of high global warming potential (GWP) refrigerants which include hydrofluorocarbons (HFCs). In order to determine the charged refrigerant sample mass, the differences between the weights of the two bottles before and after the charging process were used for the calculation of both the refrigerant amount removed from the refrigerant bottle and the refrigerant remaining in the connection tubes which was collected in the recovery bottle The difference in these values provides the refrigerant charged into the isochoric cell. On the basis of the propagation of uncertainty, the uncertainty of the mole fraction depends on the mass of the charged sample, the calculated specific volume, and the mole fraction itself.[26,27] The expanded uncertainties with a coverage factor of 2 (95% confidence level) for R32 mole fractions (z1) of the R32 (1) + R1234ze(E) (2) binary system are reported in Tables 3 and 4.
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