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An International Standard Formulation for 2,3,3,3-Tetra uoroprop-1-ene (R1234yf) Covering Temperatures from the Triple-point Temperature to 410 K and Pressures up to 100 MPa

Published

Author(s)

Eric W. Lemmon, Ryo Akasaka

Abstract

A new fundamental equation of state is presented for 2,3,3,3-tetra uoroprop-1-ene (R1234yf). The equation is valid from the triple point temperature (121.6 K) to 410 K at pressures up to 100 MPa, where typical expanded uncertainties (k = 2) in calculated properties from the equation are 0.1 % for vapor pressures, 0.1 % for liquid densities, 0.2 % for vapor densities, 0.02 % for vapor-phase sound speeds, and 0.05 % for liquid-phase sound speeds. The uncertainties in isobaric heat capacity are 1 % for the vapor phase and 2 % for the liquid phase. The uncertainty in liquid-phase isochoric heat capacity is 2 %. At temperatures below 270 K the uncertainty in vapor pressure increases to 0.3 %, and at the upper limit of pressure (100 MPa) the uncertainty in density is 0.25 %. Various plots of constant-property lines demonstrate that not only does the equation exhibit correct behavior over all temperatures and pressures within the range of validity, but also that it shows reasonable extrapolation behavior at extremely low and high temperatures, and at high pressures. The equation of state is the best currently available property representation for R1234yf, and has been recommended as an international standard by the working group presently revising ISO 17584 (Refrigeration properties).
Citation
International Journal of Thermophysics
Volume
43

Keywords

2, 3, 3, 3-Tetrafluoroprop-1-ene, equation of state, R1234yf

Citation

Lemmon, E. and Akasaka, R. (2022), An International Standard Formulation for 2,3,3,3-Tetra uoroprop-1-ene (R1234yf) Covering Temperatures from the Triple-point Temperature to 410 K and Pressures up to 100 MPa, International Journal of Thermophysics, [online], https://doi.org/10.1007/s10765-022-03015-y, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=933743 (Accessed November 29, 2022)
Created June 13, 2022, Updated September 14, 2022