Page 34 - Mechanical Engineers' Handbook (Volume 4)

Thermophysical Properties of Fluids 23

Table 15 Thermophysical Properties of Refrigerant 134a
P
(bar)
Sat.
t ( C) Property 1 2.5 5 7.5 10 12.5 15 Vapor
c p (kJ/kg K) 0.8197 0.8740 0.8975
(10 6 Pa s) 11.00 10.95 10.94
0
k (W/m K) 0.0119 0.0120 0.0120
Pr 0.763 0.798 0.809
c p (kJ/kg K) 0.8324 0.8815 0.9408
(10 6 Pa s) 11.38 11.42 11.42
10
k (W/m K) 0.0126 0.0127 0.0129
Pr 0.753 0.786 0.821
c p (kJ/kg K) 0.8458 0.8726 0.9642 0.9864
(10 6 Pa s) 11.78 11.83 11.91 11.93
20
k (W/m K) 0.0134 0.0135 0.0138 0.0139
Pr 0.747 0.774 0.830 0.838
c p (kJ/kg K) 0.8602 0.8900 0.9587 1.044 1.048
(10 6 Pa s) 12.27 12.28 12.29 12.36 12.37
30
k (W/m K) 0.0141 0.0143 0.0145 0.0150 0.0150
Pr 0.743 0.764 0.805 0.857 0.859
c p (kJ/kg K) 0.8747 0.8998 0.9547 1.027 1.134 1.145
(10 6 Pa s) 12.57 12.61 12.66 12.75 12.88 12.89
40
k (W/m K) 0.0148 0.0150 0.0153 0.0156 0.0161 0.0161
Pr 0.740 0.757 0.789 0.839 0.907 0.916
c p (kJ/kg K) 0.8891 0.9112 0.9555 1.017 1.120 1.213 1.246
(10 6 Pa s) 12.96 13.00 13.05 13.14 13.23 13.33 13.47
50
k (W/m K) 0.0156 0.0158 0.0160 0.0163 0.0167 0.0171 0.0173
Pr 0.739 0.752 0.778 0.820 0.887 0.946 0.960
c p (kJ/kg K) 0.9045 0.9230 0.9589 1.003 1.060 1.151 1.248 1.387
(10 6 Pa s) 13.35 13.39 13.44 13.51 13.60 13.75 13.96 14.16
60
k (W/m K) 0.0164 0.0165 0.0167 0.0170 0.0173 0.0178 0.0184 0.0185
Pr 0.739 0.750 0.772 0.801 0.829 0.889 0.935 1.059
c p (kJ/kg K) 0.9201 0.9359 0.9652 0.9972 1.046 1.100 1.175 1.606
(10 6 Pa s) 13.74 13.77 13.82 13.89 13.97 14.10 14.27 15.04
70
k (W/m K) 0.0171 0.0172 0.0174 0.0176 0.0179 0.0183 0.0189 0.0197
Pr 0.739 0.750 0.759 0.787 0.813 0.848 0.886 1.226
c p (kJ/kg K) 0.9359 0.9520 0.9715 0.9992 1.038 1.222 1.313 2.026
(10 6 Pa s) 14.11 14.14 14.19 14.25 14.33 14.43 14.59 16.31
80
k (W/m K) 0.0178 0.0179 0.0180 0.0182 0.0185 0.0188 0.0193 0.0205
Pr 0.741 0.752 0.757 0.782 0.804 0.938 0.993 1.612
c p (kJ/kg K) 0.7931 0.8782 0.9761 1.059 1.139 1.223 1.314 —
(10 6 Pa s) 11.72 12.34 12.86 13.34 13.81 —
Sat. vapor
k (W/m K) 0.0136 0.0149 0.0161 0.0173 0.0184 —
Pr 0.841 0.877 0.910 0.943 0.986 —
Note. At 0 C, 1 bar the viscosity is 11 10 6 Pa s.; Pr Prandtl number.