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# Propane - Thermal Diffusivity vs. Temperature and Pressure

Thermal diffusivity is the rate of transfer of heat of a material from the hot side to the cold side - a measure of how quickly a material can absorb heat from its surroundings. It can be calculated by taking the thermal conductivity divided by density and specific heat capacity at constant pressure.

Thermal diffusivity has the SI derived unit of [m²/s] , and is usually denoted α but a, κ, K, and D are also used. The formula is:

α =k /(ρ CP )            [1]

where
k = is thermal conductivity [W/(m·K)]
ρ = density [kg/m³]
CP = specific heat capacity [J/(kg·K)]

Below, thermal diffusivity of propane at varying temperatures and 1, 10, 50 and 100 bara (14.5, 145, 725 and 1450 psia) are given in figures and tables .

See also other properties of propane at varying temperature and pressure: Density and specific weight , Dynamic and Kinematic Viscosity , Prandtl number , Specific heat (heat capacity) , Thermal conductivity , and Thermophysical properties at standard conditions ,
as well as thermal diffusivity of air , nitrogen and water .

Thermal diffusivity of propane at 1, 10 and 100 bara (14.5, 145 and 1450 psia), and varying temperature given as °C or °F:

.

Thermal diffusivity of propane at atmospheric pressure and given temperature, SI and Imperial units:

Propane - Thermal Diffusivity vs. Temperature at Atmospheric Pressure
State Temperature Thermal diffusivity Temperature Thermal diffusivity
[K] [°C] [x10-6 m2/s] [m2/h] [K] [°F] [x10 -5 ft2/s] [ ft2/h]
Liquid 123 -150 0.142 0.000510 116 -250 0.154 0.00555
148 -125 0.134 0.000482 144 -200 0.146 0.00524
173 -100 0.124 0.000448 172 -150 0.134 0.00484
198 -75 0.114 0.000410 200 -100 0.122 0.00438
223 -50 0.103 0.000369 228 -50 0.108 0.00390
231 -42 0.09896 0.000356 231 -44 0.107 0.00384
Gas 231 -42 3.68 0.0132 231 -44 3.88 0.140
248 -25 4.33 0.0156 244 -20 4.88 0.176
263 -10 4.94 0.0178 255 0 5.76 0.207
268 -5 5.14 0.0185 266 20 6.69 0.241
273 0 5.35 0.0193 272 30 7.18 0.259
278 5 5.56 0.0200 278 40 7.68 0.276
283 10 5.78 0.0208 283 50 8.19 0.295
293 20 6.22 0.0224 294 70 9.26 0.333
298 25 6.44 0.0232 300 80 9.82 0.353
303 30 6.67 0.0240 305 90 10.4 0.374
323 50 7.61 0.0274 311 100 11.0 0.395
348 75 8.86 0.0319 339 150 14.1 0.509
373 100 10.2 0.0367 366 200 17.8 0.639
398 125 11.6 0.0418 394 250 21.8 0.786
423 150 13.1 0.0473 422 300 26.4 0.951
448 175 14.8 0.0532 478 400 37.3 1.34
473 200 16.5 0.0594 533 500 50.7 1.83
523 250 20.3 0.0730 589 600 67.0 2.41
573 300 24.5 0.0884 644 700 86.4 3.11
623 350 29.3 0.106 700 800 109 3.94
673 400 34.7 0.125 755 900 136 4.90
773 500 47.1 0.170 811 1000 167 6.02
.

Thermal diffusivity of propane at given temperature and pressure, SI and Imperial units:

Propane - Thermal Diffusivity vs. Temperature and Pressure
State Temperature Pressure Thermal diffusivity
[K] [°C] [°F] [bara] [psia] [x10-6 m2/s] [x10 -5 ft2/s]

Liquid at

equilibrium

100 -173 -280 2.5E-07 3.7E-06 0.149 0.160
130 -143 -226 0.000176 0.00255 0.140 0.151
160 -113 -172 0.00850 0.1233 0.130 0.140
190 -83.2 -118 0.1055 1.530 0.117 0.126
220 -53.2 -63.7 0.6058 8.787 0.104 0.112
250 -23.2 -9.7 2.180 31.62 0.0902 0.0971
280 6.9 44.3 5.817 84.37 0.0772 0.0831
310 36.9 98.3 12.73 184.6 0.0650 0.0699
320 46.9 116 15.99 231.9 0.0609 0.0656
340 66.9 152 24.32 352.7 0.0512 0.0551
355 81.9 179 32.43 470.4 0.0394 0.0425
360 86.9 188 35.55 515.6 0.0345 0.0371

Gas at

equilibrium

100 -173 -280 2.5E-07 3.7E-06 1921257 2068022
130 -143 -226 0.000176 0.00255 5460 5877
160 -113 -172 0.00850 0.1233 187 201
190 -83.2 -118 0.1055 1.530 22.2 23.9
220 -53.2 -63.7 0.6058 8.787 5.13 5.52
250 -23.2 -9.7 2.180 31.62 1.73 1.86
280 6.9 44.3 5.817 84.37 0.729 0.785
310 36.9 98.3 12.73 184.6 0.341 0.367
320 46.9 116 15.99 231.9 0.264 0.284
340 66.9 152 24.32 352.7 0.151 0.163
355 81.9 179 32.43 470.4 0.0800 0.0861
360 86.9 188 35.55 515.6 0.0552 0.0594
Liquid 85.53 -187.62 -305.72 1 14.5 0.148 0.159
100 -173 -280 1 14.5 0.147 0.158
120 -153 -244 1 14.5 0.142 0.153
140 -133 -208 1 14.5 0.137 0.147
160 -113 -172 1 14.5 0.130 0.139
180 -93.2 -136 1 14.5 0.122 0.131
200 -73.2 -99.7 1 14.5 0.113 0.122
220 -53.2 -63.7 1 14.5 0.104 0.112
230.74 -42.41 -44.34 1 14.5 0.0992 0.107
Gas 230.74 -42.41 -44.34 1 14.5 3.36 3.62
240 -33.2 -27.7 1 14.5 3.70 3.98
260 -13.2 8.3 1 14.5 4.46 4.80
280 6.9 44.3 1 14.5 5.26 5.66
300 26.9 80.3 1 14.5 6.09 6.56
320 46.9 116 1 14.5 6.96 7.50
340 66.9 152 1 14.5 7.88 8.48
360 86.9 188 1 14.5 8.84 9.51
400 127 260 1 14.5 10.9 11.7
500 227 440 1 14.5 17.1 18.4
600 327 620 1 14.5 25.1 27.0
700 427 800 1 14.5 35.1 37.7
800 527 980 1 14.5 47.3 50.9
900 627 1160 1 14.5 62.1 66.8
1000 727 1340 1 14.5 79.6 85.7
Liquid 85.62 -187.53 -305.55 10 145 0.148 0.159
100 -173 -280 10 145 0.147 0.158
120 -153 -244 10 145 0.143 0.154
140 -133 -208 10 145 0.137 0.147
160 -113 -172 10 145 0.130 0.140
180 -93.2 -136 10 145 0.122 0.131
200 -73.2 -99.7 10 145 0.113 0.122
220 -53.2 -63.7 10 145 0.105 0.112
240 -33.2 -27.7 10 145 0.0955 0.103
260 -13.2 8.3 10 145 0.0866 0.0933
280 6.9 44.3 10 145 0.0779 0.0839
300.09 26.94 80.49 10 145 0.0692 0.0745
Gas 300.09 26.94 80.49 10 145 0.435 0.468
320 46.9 116 10 145 0.553 0.595
340 66.9 152 10 145 0.668 0.719
360 86.9 188 10 145 0.782 0.842
400 127 260 10 145 1.02 1.10
500 227 440 10 145 1.69 1.81
600 327 620 10 145 2.51 2.70
700 427 800 10 145 3.54 3.81
800 527 980 10 145 4.78 5.15
900 627 1160 10 145 6.28 6.76
1000 727 1340 10 145 8.05 8.67
Liquid 100 -173 -280 50 725 0.150 0.161
200 -73.2 -99.7 50 725 0.115 0.124
300 26.9 80.3 50 725 0.0734 0.0790
Supercritical
phase
400 127 260 50 725 0.102 0.110
500 227 440 50 725 0.300 0.322
Liquid 86.45 -187 -304 100 1450 0.149 0.160
100 -173 -280 100 1450 0.148 0.159
120 -153 -244 100 1450 0.144 0.155
140 -133 -208 100 1450 0.139 0.150
160 -113 -172 100 1450 0.133 0.143
180 -93.2 -136 100 1450 0.125 0.135
200 -73.2 -99.7 100 1450 0.117 0.126
220 -53.2 -63.7 100 1450 0.109 0.117
240 -33.2 -27.7 100 1450 0.101 0.108
260 -13.2 8.3 100 1450 0.0925 0.0996
280 6.9 44.3 100 1450 0.0849 0.0913
300 26.9 80.3 100 1450 0.0779 0.0838
320 46.9 116 100 1450 0.0716 0.0771
340 66.9 152 100 1450 0.0660 0.0711
360 86.9 188 100 1450 0.0611 0.0658
Supercritical
phase
400 127 260 100 1450 0.0538 0.0579
500 227 440 100 1450 0.128 0.137
600 327 620 100 1450 0.235 0.253
700 427 800 100 1450 0.357 0.384
800 527 980 100 1450 0.501 0.539
900 627 1160 100 1450 0.669 0.720
1000 727 1340 100 1450 0.865 0.931

Unit conversion thermal diffusivity:

square feet/second [ft2/s], square feet/hour [ft2/h], square meter/hour [m2/h], square meter/second [m2/s]

• 1 ft2/h = 2.7778x10-4 ft2/s = 0.09290 m2/h = 2.581x10 -5 m2/s
• 1 ft2/s = 3600 ft2/h = 334.45 m2/h = 0.09290 m2/s
• 1 m2/h = 2.7778x10-4 m2/s = 10.7639 ft2/h = 0.002990 ft2/s
• 1 m2/s = 3600 m2/h = 38750.1 ft2/h = 10.7639 ft2/s

## Related Topics

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### • Thermodynamics

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