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# Propane - Thermal Diffusivity vs. Temperature and Pressure

## Figures and tables showing thermal diffusivity of liquid and gaseous propane at varying temperarure and pressure, SI and Imperial units.

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, Prandtl numberSpecific 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:

 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:

 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

• Fluid Mechanics - The study of fluids - liquids and gases. Involving velocity, pressure, density and temperature as functions of space and time.
• Material Properties - Material properties of gases, fluids and solids - densities, specific heats, viscosities and more.
• Thermodynamics - Work, heat and energy systems.

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