Thermodynamic properties of Freon

EQUATION OF STATE AND THERMODYNAMIC PROPERTIES OF FREON-21. //ENGLISH TRANSLATION OF TEPLOENERGETIKA 16/1/79-83,1969.//... 

TABLE 6. Experimental Study of the Thermodynamic Properties of Freon-20 at Low Pressure... 

For the calculation of thermodynamic properties of Freon-20 in the singlephase region at elevated pressures, Seshadri et al. [1.58] used an equation of the following type ... 

The fundamental experimental and computational investigations of thermodynamic properties of Freon-21 (fluorodichloromethane) were carried out in the late 1960s. However, the results obtained are not fully reflected in the reference handbooks [0.8-0.10 and others]. Thus, the tables for the values of p, hy and s on the saturation line, which were published in paper [2.1], are presented in the reference survey [0.34] and the tables in the single-phase region in handbook [0.10]. The tables of thermodynamic properties on the saturation line (recommended in books [0.8-0.10]) repeat the data calculated by Rombusch and Giesen [0.46, 2.37], which are based on a small number of measurements [2.23-2.37]. 

TABLE 13. Experimental Studies of Thermodynamic Properties of Freon-21 in the Single-Phase Region... 

In reference books [0.7, 0.45, and others] the tables of thermodynamic properties of Freon-21 which were compiled by Benning and McHamess (1939) are recommended. 

TABLE 22. Thermodynamic Properties of Freon-21 on the Saturation Line... 

The fundamental experimental investigations of the thermodynamic properties of Freon-22, which were carried out in 18 laboratories, are given in Tables 26... 

The first tables of thermodynamic properties of Freon-22 were compiled by Graham and McHamess in 1945 based on the analysis of data by Benning and coworkers [2.23-2.26]. These tables were published practically unaltered in a number of handbooks [0.7, 0.45, 2.22, and others]. They include the values of V, hy and s on the saturation line at T = 170-325 K and in the region of superheated vapor at r 430 K and 1.8 MPa. 

Reference [3.1] shows that the equation of state obtained at MEI corresponds with the experimental data existing up to 1972 about thermodynamic properties of Freon-22 far better and in a wider region of state. From this equation, detailed tables of thermodynamic properties of liquid and gaseous Freon-22 were computed at T = 273-553 K and p = 0.1-35 MPa. These tables include the values of p, h, s, 0,/, Cp, c, w, 87, x, p, a, and 7 in the single phase and on the saturation line. 

TABLE 34. Comparative Results of the Calculated Data from Eq. (0.15) and the Experimental Data for Thermodynamic Properties of Freon-22 in the Gaseous Region ... 

TABLE 38. Thermodynamic Properties of Freon-22 in the Single-Phase Region Continued)... 

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