Abstract
This work presents 24 vapor pressures and 131 vapor-phase pvT properties for 1,1-difluoroethene (R1132a) measured using an isochoric apparatus. This fluid is a hydrofluoroolefin with a GWP less than 3 and it is considered to be a potential component for low-GWP refrigerant mixtures for ultralow temperature applications. The saturated pressure data were obtained in the temperature range from (223.15 to 280.65) K and pressure range from (0.471 to 2.675) MPa. The vapor-phase pvT measurements were performed in the temperature range from (223.15 to 303.15) K, pressure range from (0.312 to 2.340) MPa, and specific volume range from (0.013226 to 0.086770) m3 kg−1. The saturated pressure data were compared with the experimental values available in literature and fitted to extended Antoine-type and Wagner-type vapor-pressure correlations. The vapor-phase pvT data were compared with the values available in literature. In addition, the pvT properties were used to develop a truncated virial equation of state.
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