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Fundamental equations of state with an identical functional form for HFO-1234yf and HFO-1234ze(E).

Number: pap. ID: 429

Author(s) : AKASAKA R.

Summary

New fundamental equations of state explicit in the Helmholtz energy are presented for 2,3,3,3-tetrafluoropropene (HFO-1234yf) and trans-1,3,3,3-tetrafluoropropene [HFO-1234ze(E)]. The equations have the same functional form for their residual part. All thermodynamic properties can be derived from the equations. The equation for HFO-1234yf covers temperatures between 240 and 400 K for pressures up to 40 MPa, and that for HFO-1234ze(E) is valid for temperatures from 240 to 420 K and for pressures up to 15 MPa. The estimated uncertainties of the equations are 0.1% in liquid density, 0.05% in the vapor phase speed of sound, and 0.1% in vapor pressure. Both equations exhibit reasonable behavior in extrapolated region outside the range of the experimental data.

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Pages: 8 p.

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Details

  • Original title: Fundamental equations of state with an identical functional form for HFO-1234yf and HFO-1234ze(E).
  • Record ID : 30002998
  • Languages: English
  • Source: Proceedings of the 23rd IIR International Congress of Refrigeration: Prague, Czech Republic, August 21-26, 2011. Overarching theme: Refrigeration for Sustainable Development.
  • Publication date: 2011/08/21

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