C8F18 - PF5080

Generated by the program written by Lew Tousignant of the 3M Company.
 General Properties:
Critical Temp.  495 [K]
Boiling point  97 [°C]
Mol Weight  438
Pour point  -90 [°C]
hfg  84267.4 [J kg-1]


Liquid Properties as a Function of Temperature  Vapor
t [0] r [1] n[2] n[2] m [3] m[3] Cp [4] k [5] Prandtl [6] b [7] s [8] Pv [9]
°C kg m-3 cSt m2 s-1 kg m-1 s-1 cPoise J kg-1 C-1 W m-1 C-1   C-1 N m-1 Pa
-30 1912 2.692 2.69E-06 5.15E-03 5.15 967 0.067 73.86 0.00128 17.97 193
-25 1899 2.269 2.27E-06 4.31E-03 4.31 975 0.067 62.71 0.00129 17.53 279
-20 1887 1.942 1.94E-06 3.66E-03 3.66 983 0.067 54.07 0.00130 17.09 398
-15 1875 1.683 1.68E-06 3.16E-03 3.16 991 0.066 47.23 0.00131 16.65 559
-10 1863 1.476 1.48E-06 2.75E-03 2.75 998 0.066 41.72 0.00132 16.22 775
-5 1850 1.307 1.31E-06 2.42E-03 2.42 1006 0.065 37.19 0.00132 15.78 1061
0 1838 1.166 1.17E-06 2.14E-03 2.14 1014 0.065 33.43 0.00133 15.35 1437
5 1826 1.048 1.05E-06 1.91E-03 1.91 1022 0.065 30.25 0.00134 14.92 1925
10 1814 0.947 0.95E-06 1.72E-03 1.72 1030 0.064 27.55 0.00135 14.49 2551
15 1801 0.861 0.86E-06 1.55E-03 1.55 1037 0.064 25.21 0.00136 14.07 3349
20 1789 0.786 0.79E-06 1.41E-03 1.41 1045 0.063 23.18 0.00137 13.65 4356
25 1777 0.721 0.72E-06 1.28E-03 1.28 1053 0.063 21.41 0.00138 13.23 5615
30 1765 0.664 0.66E-06 1.17E-03 1.17 1061 0.063 19.84 0.00139 12.81 7178

Heat Transfer Performance, Liquid

Forced convection heat transfer performance [10]; liquid only     FOM: Figure of Merit Natural convection heat transfer performance [11]; liquid only  
FOM: Figure of Merit
t [0] Turbulent external flow;
FOM = r0.8 k0.67 Cp0.33 m-0.47
h = FOM 0.036 V0.8 L-0.2		 Turbulent internal flow;
FOM = r0.8 k0.6 Cp0.4 m-0.4
h = FOM 0.023 V0.8 L-0.2		 Laminar external flow;
FOM = r0.5 k0.67 Cp0.33 m-0.17
h = FOM 0.664 V0.5 L-0.5		 Laminar internal flow;
FOM = k
h = FOM Const D-1		 Laminar flow;
FOM = b0.25 r0.5 k0.75 Cp0.25 m-0.25
h = FOM k L-1		 Turbulent flow;
FOM = b0.33 r0.66 k0.66 Cp0.33 m-0.33
h = FOM k L-1
-30
7964
10763
169.895
0.0674
22.79
150.89
-25
8602
11492
174.306
0.067
23.72
159.45
-20
9222
12194
178.353
0.0666
24.60
167.63
-15
9826
12870
182.075
0.0662
25.43
175.47
-10
10415
13523
185.513
0.0658
26.21
182.99
-5
10988
14154
188.7
0.0654
26.95
190.23
0
11549
14765
191.666
0.065
27.66
197.22
5
12098
15359
194.438
0.0646
28.33
203.98
10
12636
15937
197.034
0.0642
28.97
210.55
15
13164
16501
199.472
0.0638
29.59
216.94
20
13684
17051
201.766
0.0634
30.18
223.16
25
14194
17589
203.926
0.063
30.75
229.22
30
14696
18114
205.961
0.0626
31.30
235.15

  Footnotes
[0] t, units of degrees C
[1] Based on ASTM standard D-341 correlations (original viscosity in cSt)
[2] Based on kinematic viscosity from ASTM D-341 and density
[3] Based on linear relationship for r vs t: r = A - B t
[4] Conversion: 1 cP = 10-6 (m2  s-1)
[5] Based on linear relationship for Cp vs t: Cp = A - B t
[6] Based on linear relationship for k vs t: k = A - B t
[7] Prandtl = Cp m k-1
[8] b, coefficient of volumetric expansion: (dr/dt)/r.
[9] Based on relationship between s and T: s = A (1-Tr)B; from McLure et al, J Chem Soc, Faraday Transactions, 1, 1982, 78, 2251 - 2257.
[10] Based on linear relationship between log (PV) vs T-1: log (torr) = A - B/T; 1 torr = 133.3 Pa
[11] Based on Mouromtseff number; Saylor et. al., IEEE Transactions on Comp, Hyb, and Mfg Tech, Vol 11, No 4, Dec 1988
 


CERN/P.BONNEAU/08/05/2000