An Update on the Thermophysical Properties Data Available for Pure Low GWP Refrigerants

The process to reduce the negative environmental impact of working fluids for the HVAC&R industry is still undergoing. One of the problems to be faced with the new low GWP refrigerants is the knowledge of their thermodynamic and transport properties. Few years ago, a thorough analysis of the open literature has been performed to determine the amount of available data for the most important synthetic low GWP pure fluids. It was highlighted that only two fluids, namely R1234yf and R1234ze(E), had been extensively investigated, while there was a lack of information about the other HFOs. In this paper, an update on the state-of-the-art of scientifically-determined thermophysical properties for pure HFOs is reported.