Article ID: 25-19
Nowadays, hydrofluorocarbons used as refrigerants in air conditioning systems are being reevaluated worldwide due to their substantial environmental impact and high global warming potential. This has driven the advancement of next-generation refrigerants HFO1123 considered as a component candidate for next-generation refrigerant mixture due to its zero-ozone depletion potential and low global warming potential (GWP). However, no experimental data regarding its thermal conductivity are available in the open literature. This study investigates the thermal conductivity of HFO1123 in both the liquid and vapor phases. The accuracy and reliability of the apparatus were validated by measuring the thermal conductivity of R134a. The thermal conductivity of HFO1123 was measured using the transient hot-wire technique, employing a platinum wire with a diameter of 15 µm. Experiments were conducted over a temperature range from 233 K to 313 K and pressures between 0.52 MPa and 4.30 MPa. The estimated combined uncertainty of the thermal conductivity measurements is 1.14% for the liquid phase and 1.62% for the vapor phase. The experimental data of HFO1123 were compared with REFPROP 10.0, a predictive extended corresponding states (ECS) model. Furthermore, the residual entropy scaling (RES) technique-based thermal conductivity model of HFO1123 has been applied using the experimental data.
