Novel molecules as working fluids for refrigeration, heat pump and organic Rankine cycle systems

Hydrofluorocarbons (HFCs), one of the most used working fluids in HVAC&R and ORC applications, are being phased down rapidly because their high global warming potential (GWP). Consequently, this sector is looking for suitable eco-friendly low-GWP alternatives to representative 3rd generation HFC refrigerants (R-134a, R-404A, R-410A, R-245fa). This article reviews publicly available investigations regarding thermodynamic transport properties system performance several molecules. First, added ANSI/ASHRAE Standard 34 since 2015 (R-1130(E), R-1336mzz(Z), R-1336mzz(E), R-1233zd(E), R-1224yd(Z), R-13I1, R-1132a) considered. Then, other molecules identified recent studies but not been yet that standard (R-1123, R-1243zf, R-1225ye(Z), R-1132(E), R-1252ye, R-1261ze, R-1141) investigated. The R-1233zd(E) R-1224yd(Z) well described, suitability high-temperature heat pump (HTHP) Organic Rankine cycle (ORC) systems experimentally confirmed. R-1336mzz(Z) R-1132a considered promising HTHP systems, ULT respectively. R-13I1 as a flame suppressant recently developed blends, such R-466A. Properties R-1123, R-1225ye(Z) have studied, they single compound due safety concerns. Therefore, further needed confirm suitability. R-1130(E), R-1141 molecules, so scarce property data available, no conclusions can be extracted about them.