Solubilities of R-1233zd(E) in Three Lubricating Oils and Impact of Oil Retention on the Evaporator Performance

Owing to the worse greenhouse gas effect, the global warming problem is becoming more and more serious. Exploring suitable refrigerants to replace high-GWP HFCs is currently one of the key issues of concern in the refrigeration field. Among alternatives, trans-1-chloro-3,3,3-trifluoropropene (R-1233zd(E)) is attracting a lot of fashionable attention in the refrigeration and air conditioning industry. To increase the database of solubility and enthalpy for R-1233zd(E) with polyol ester (POE) and polyalkylene glycol (PAG) oils, as well as reveal the oil retention influence on the evaporator in a vapor compression refrigeration system using R-1233zd(E), the miscibility and solubility behaviors were investigated for R-1233zd(E) with POE75, POE85, and PAG68 oils using an isochoric method between 298.15 and 343.15 K. The non-random two liquid (NRTL) equation was applied to correlate and predict the solubility. Pressure–enthalpy–vapor quality (p–h–X) diagrams were presented for R-1233zd(E) at oil circulation mass fractions (Cg) of 2 and 4%. Meanwhile, the differences were analyzed for the enthalpy change and nonevaporated quantity.