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Session: Working fluids I
Session starts: Tuesday 08 October, 11:20
Presentation starts: 11:20
Room: Willem Burger Zaal

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Konstantinos (Kostas) Kontomaris (DuPont)
Barbara Minor (DuPont)
Claus-Peter Keller (DuPont)

Abstract:
A new refrigerant, DR-2 has been developed which is a nonflammable with very low global warming potential (GWP) and is suitable for use in organic rankine cycles (ORCs). DR-2 is a hydrofluoro-olefin-based (HFO) fluid with an ozone depletion potential of zero and a GWP of less than 10. It is non-flammable and has a favorable toxicity profile based on testing to date. DR-2 is chemically stable in the presence of lubricant and metals up to the maximum temperature tested of 250 oC. DR-2 has a boiling point of 33ºC and relatively high critical temperature, which generates relatively low vapor pressures and enables high cycle energy efficiencies. DR-2 thermodynamic performance under cycle conditions representative of ORC applications was evaluated through computational modeling. It can enable more environmentally sustainable ORC cycle platforms for the utilization of low temperature heat to generate electrical power at higher temperatures and with higher energy efficiencies than incumbent working fluids.