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New ISO 17584 standard formulations for Cis-1,1,1,4,4,4-Hexafluorobutene [R1336mzz(Z)] and Trans-1-Chloro-3,3,3-Trifluoropropene [R1233zd(E)].

Number: 1156

Author(s) : AKASAKA R., LEMMON E. W.

Summary

New fundamental equations of state have recently been developed for cis-1,1,1,4,4,4-hexafluorobutene [R1336mzz(Z)] and trans-1-chloro-3,3,3-trifluoropropene [R1233zd(E)]. The former is a very promising candidate for working fluids in organic Rankine cycles, and the latter is a potential refrigerant alternative for 1,1,1,3,3-pentafluoropropane (R245fa) for centrifugal chillers. There are regions in previous equations of state for these fluids where calculated values exceed the uncertainties required for use of the fluids; for example, liquid-phase sound speeds show relative deviations of over 1 % from accurate measurements. The new equations calculate all thermodynamic properties within the experimental uncertainties of the measurements. Typical relative deviations are 0.05% for densities in the temperature range from 220 K to 460 K, 0.1% in densities outside this range, 0.03% for vapor pressures, and 0.04% for sound speeds in the liquid and vapor phases below 480 K. These equations have been recommended as international standards by the working group presently revising ISO 17584 (Refrigerant Properties). The equation for R1336mzz(Z) is already available in NIST REFPROP 10.0.

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Details

  • Original title: New ISO 17584 standard formulations for Cis-1,1,1,4,4,4-Hexafluorobutene [R1336mzz(Z)] and Trans-1-Chloro-3,3,3-Trifluoropropene [R1233zd(E)].
  • Record ID : 30027680
  • Languages: English
  • Subject: HFCs alternatives
  • Source: IIR Rankine Conference 2020.
  • Publication date: 2020/07/31
  • DOI: http://dx.doi.org/10.18462/iir.rankine.2020.1156

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