Solid-liquid equilibria for nitrous oxide + fluoromethane and triple point measurements for refrigerants
Cristiano Di Nicola, Matteo Moglie, Giulio Santori, Roman Stryjek and Giovanni Di Nicola
To evaluate the Solid-Liquid Equilibria (SLE) of alternative refrigerants systems, an experimental set-up was employed. The behavior of the nitrous oxide + fluoromethane (N2O + R41) binary system was measured down to temperatures of 126.5 K. The triple point temperature of carbon dioxide, nitrous oxide and of seven of the most widely applied alternative refrigerants, namely fluoromethane (R41), difluoromethane (R32), trifluoromethane (R23), pentafluoroethane (R125), 1,1,1,2-tetrafluoroethane (R134a), 1,1,1-trifluoroethane (R143a) and 1,1-difluoroethane (R152a), were also measured. All triple point data measured revealed a generally good consistency with the literature.
The results obtained for the mixtures were corrected by the Rossini method and interpreted by means of the Schröder equation.
Keywords: Fluoromethane; nitrous oxide; refrigerants; solid-liquid equilibria; thermodynamics; triple point.