Speed of Sound Measurements of Binary Mixtures of trans-1,2-Difluoroethylene (R-1132(E)) with Difluoromethane (R-32) or 2,3,3,3-Tetrafluoropropene (R-1234yf).

ABSTRACT: The speed of sound of two binary mixtures containing 0.336 mole fraction trans-1,2-difluoroethylene (R-1132(E)) with difluoromethane (R-32) and 0.435 mole fraction R-1132(E) with 2,3,3,3-tetrafluoropropene (R-1234yf) was measured with a dual-path pulse-echo instrument. The speed of sound was measured along several pseudoisochores for each blend at temperatures ranging from 230 to 325 K for blends with R-32 and to 342 K for blends with R-1234yf. Measurements started at pressures just above each mixture's bubble point pressure and were limited to 8 MPa to avoid potential disproportionation reactions of R-1132(E). The data were compared to multifluid models incorporating Helmholtz-energy-explicit equations of state (EOS) for each pure fluid. No binary interaction parameters for either

SUBMITTER: Rowane AJ 

PROVIDER: S-EPMC11848904 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature