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Session: Poster session
Session starts: Tuesday 13 October, 13:30

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Gregory Smith (Honeywell International)
Abdennacer Achaichia (Honeywell Belgium N.V.)
Raymond Thomas (Honeywell International)

Abstract:
Organic Rankine Cycle system designs that operate with hydrofluorocarbon working fluids such as HFC-134a (1,1,1,2-tetrafluoroethane) and HFC-245fa (1,1,1,3,3-pentafluoropropane) have been operating in the field for a number of years, and HFC-245fa has emerged as a leading working fluid choice. These systems have demonstrated environmental benefits that validate their current and future use. Even so, there is great interest among system OEMs, equipment end-users, regulatory agencies, and the public to embrace new low global warming technologies. Honeywell has developed a fluid that can serve as a replacement for HFC-245fa in foam expansion, aerosols, and organic Rankine cycle applications, which has an ultra-low global warming potential of 1. This working fluid is fluorinated olefin R-1233zd(E) (1-chloro-3,3,3-trifuoroprop-1-ene). The environmental and thermo-physical properties of this fluid are reviewed, and theoretical thermodynamic efficiency and ORC system calculations are presented for R-1233zd(E) and are compared to HFC-245fa. Thermal stability data for R-1233zd(E) is also presented, along with the results of a high-temperature material compatibility study.