Page 31 - Mechanical Engineers' Handbook (Volume 4)

20 Thermophysical Properties of Fluids

Table 12 (Continued)
v (m /kg) h (kJ/kg) s (kJ/kg K)
3
T c p
(K) P (bar) Liquid Vapor Liquid Vapor Liquid Vapor (Liquid) (Liquid) (Liquid) (Liquid)
320 18.02 9.096. 4 0.01265 458.6 616.7 4.194 4.688 1.372 0.176 0.077 0.0040
330 22.61 9.535. 4 9.753. 3 472.4 617.3 4.235 4.674 1.460 0.167 0.072 0.0026
340 28.03 1.010. 3 7.479. 3 487.2 616.5 4.278 4.658 1.573 0.151 0.067 0.0014
350 34.41 1.086. 3 5.613. 3 503.7 613.3 4.324 4.637 1.718 0.130 0.062 0.0008
360 41.86 1.212. 3 4.036. 3 523.7 605.5 4.378 4.605 1.897 0.106
369.3 49.89 2.015. 3 2.015. 3 570.0 570.0 4.501 4.501 — — 0

a 4
c p in units of kJ/kg K; viscosity (10 Pa s); thermal conductivity (W/m K); surface tension (N/m). Sources: P, v, T, h, s
interpolated and extrapolated from I. I. Perelshteyn, Tables and Diagrams of the Thermodynamic Properties of Freons 12, 13, 22, Moscow,
USSR, 1971. c p , , interpolated and converted from Thermophysical Properties of Refrigerants, ASHRAE, New York, 1976. calculated
from V. A. Gruzdev et al., Fluid Mech. Sov. Res., 3, 172 (1974).
b 4
The notation 6.209. 4 signifies 6.209 10 .

Table 13 Thermophysical Properties of Refrigerant 22 at Atmospheric Pressure a
Temperature (K)
250 300 350 400 450 500
v 0.2315 0.2802 0.3289 0.3773 0.4252 0.4723
h 597.8 630.0 664.5 702.5 740.8 782.3
s 4.8671 4.9840 5.0905 5.1892 5.2782 5.3562
0.587 0.647 0.704 0.757 0.806 0.848
c p
Z 0.976 0.984 0.990 0.994 0.995 0.996
166.4 182.2 196.2 209.4 220.0 233.6
v s
0.0080 0.0110 0.0140 0.0170 0.0200 0.0230
0.109 0.130 0.151 0.171 0.190 0.209
Pr 0.800 0.765 0.759 0.761 0.766 0.771
a 3
v specific volume (m /kg); h specific enthalpy (kJ/kg); s specific entropy (kJ/kg K); c p specific heat at
velocity of sound (m/s); thermal con-
constant pressure (kJ/kg K); Z compressibility factor Pv/RT; v s
2
2
ductivity (W/m K); viscosity 10 4 N s/m (thus, at 250 K the viscosity is 0.109 10 4 N s/m 0.0000109
Pa s); Pr Prandtl number.