论文信息 - Ultrasonic Speed of Sound and Derived Thermodynamic Properties of Liquid 1,1,1,2,3,3,3-Heptafluoropropane (HFC227ea) from 248 K to 333 K and Pressures up to 65 MPa

Ultrasonic Speed of Sound and Derived Thermodynamic Properties of Liquid 1,1,1,2,3,3,3-Heptafluoropropane (HFC227ea) from 248 K to 333 K and Pressures up to 65 MPa

The fluorinated propanes have recently been pointed out as promising alternatives to the chlorofluorocarbons used in the refrigeration industry. 1,1,1,2,3,3,3-heptafluoropropane, commercially designated as HFC227ea, is one of the candidates and there are very few property measurements reported in the literature. This work reports experimental data of the speed of sound in liquid 1,1,1,2,3,3,3-heptafluoropropane (HFC227ea) from 248 K to 333 K and pressures up to 65 MPa, measured with a pulse-echo method. The results are fitted with a rational approximant. Derived thermodynamic properties are calculated, combining the experimental data with density and isobaric heat capacity values published by other authors. The results were compared with the data available in the literature.

J. Esperança | Henrique J. R. Guedes | P. F. Pires

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