Properties of Saturated Steam - SI Units

A Saturated Steam Table with steam properties as specific volume, density, specific enthalpy and specific entropy

The steam table below list the properties of steam at varying pressures and temperatures:

Absolute
pressure
(kPa, kN/m2)
Temperature
(oC)
Specific
Volume
(m3/kg)
Density
- ρ -
(kg/m3)
Specific Enthalpy ofSpecific
Entropy
of Steam
- s -
(kJ/kgK)
Liquid
- hl -
(kJ/kg)
Evaporation
- he -
(kJ/kg)
Steam
- hs -
(kJ/kg)
0.8 3.8 160 0.00626 15.8 2493 2509 9.058
2.0 17.5 67.0 0.0149 73.5 2460 2534 8.725
5.0 32.9 28.2 0.0354 137.8 2424 2562 8.396
10.0 45.8 14.7 0.0682 191.8 2393 2585 8.151
20.0 60.1 7.65 0.131 251.5 2358 2610 7.909
28 67.5 5.58 0.179 282.7 2340 2623 7.793
35 72.7 4.53 0.221 304.3 2327 2632 7.717
45 78.7 3.58 0.279 329.6 2312 2642 7.631
55 83.7 2.96 0.338 350.6 2299 2650 7.562
65 88.0 2.53 0.395 368.6 2288 2657 7.506
75 91.8 2.22 0.450 384.5 2279 2663 7.457
85 95.2 1.97 0.507 398.6 2270 2668 7.415
95 98.2 1.78 0.563 411.5 2262 2673 7.377
100 99.6 1.69 0.590 417.5 2258 2675 7.360
101.331) 100 1.67 0.598 419.1 2257 2676 7.355
110 102.3 1.55 0.646 428.8 2251 2680 7.328
130 107.1 1.33 0.755 449.2 2238 2687 7.271
150 111.4 1.16 0.863 467.1 2226 2698 7.223
170 115.2 1.03 0.970 483.2 2216 2699 7.181
190 118.6 0.929 1.08 497.8 2206 2704 7.144
220 123.3 0.810 1.23 517.6 2193 2711 7.095
260 128.7 0.693 1.44 540.9 2177 2718 7.039
280 131.2 0.646 1.55 551.4 2170 2722 7.014
320 135.8 0.570 1.75 570.9 2157 2728 6.969
360 139.9 0.510 1.96 588.5 2144 2733 6.930
400 143.1 0.462 2.16 604.7 2133 2738 6.894
440 147.1 0.423 2.36 619.6 2122 2742 6.862
480 150.3 0.389 2.57 633.5 2112 2746 6.833
500 151.8 0.375 2.67 640.1 2107 2748 6.819
550 155.5 0.342 2.92 655.8 2096 2752 6.787
600 158.8 0.315 3.175 670.4 2085 2756 6.758
650 162.0 0.292 3.425 684.1 2075 2759 6.730
700 165.0 0.273 3.66 697.1 2065 2762 6.705
750 167.8 0.255 3.915 709.3 2056 2765 6.682
800 170.4 0.240 4.16 720.9 2047 2768 6.660
850 172.9 0.229 4.41 732.0 2038 2770 6.639
900 175.4 0.215 4.65 742.6 2030 2772 6.619
950 177.7 0.204 4.90 752.8 2021 2774 6.601
1000 179.9 0.194 5.15 762.6 2014 2776 6.583
1050 182.0 0.186 5.39 772 2006 2778 6.566
1150 186.0 0.170 5.89 790 1991 2781 6.534
1250 189.8 0.157 6.38 807 1977 2784 6.505
1300 191.6 0.151 6.62 815 1971 2785 6.491
1500 198.3 0.132 7.59 845 1945 2790 6.441
1600 201.4 0.124 8.03 859 1933 2792 6.418
1800 207.1 0.110 9.07 885 1910 2795 6.375
2000 212.4 0.0995 10.01 909 1889 2797 6.337
2100 214.9 0.0945 10.54 920 1878 2798 6.319
2300 219.6 0.0868 11.52 942 1858 2800 6.285
2400 221.8 0.0832 12.02 952 1849 2800 6.269
2600 226.0 0.0769 13.01 972 1830 2801 6.239
2700 228.1 0.0740 13.52 981 1821 2802 6.224
2900 232.0 0.0689 14.52 1000 1803 2802 6.197
3000 233.8 0.0666 15.00 1008 1794 2802 6.184
3200 237.4 0.0624 16.02 1025 1779 2802 6.158
3400 240.9 0.0587 17.04 1042 1760 2802 6.134
3600 244.2 0.0554 18.06 1058 1744 2802 6.112
3800 247.3 0.0524 19.08 1073 1728 2801 6.090
4000 250.3 0.0497 20.09 1087 1713 2800 6.069

1) Atmospheric pressure

  • Absolute Pressure = Gauge Pressure + Atmospheric pressure.
  • Specific enthalpy or Sensible Heat is the quantity of heat in 1 kg of water according to the selected temperature.

Example - Boiling Water at 100 oC and 0 bar

At atmospheric pressure - 0 bar gauge or absolute 101.33 kN/m2 - water boils at 100 oC. 419 kJ of energy is required to heat 1 kg of water from 0 oC to the saturation temperature 100 oC.

Therefore, at 0 bar gauge (absolute 101.33 kN/m2) and 100 oC - the specific enthalpy of water is 419 kJ/kg.

Another 2,257 kJ of energy is required to evaporate the 1 kg of water at 100 oC to steam at 100 oC. Therefore, at 0 bar gauge (absolute 101.33 kN/m2) - the specific enthalpy of evaporation is 2,257 kJ/kg.

The total specific enthalpy of the steam (or heat required to evaporate water to steam) at atmospheric pressure and 100 oC can be summarized as:

hs = 419 + 2,257

    = 2,676 kJ/kg

    = 2.676 (kJ/kg) / 3600 (s/h) = 0.74 kWh/kg

(1 hour = 3600 seconds, 1 kW = 1 kJ/s)

Example - Boiling Water at 170 oC and 7 bar

Steam at atmospheric pressure is of limited practical use. It cannot be conveyed by its own pressure along a steam pipe to the points of consumption.

At 7 bar gauge (absolute 800 kN/m2) - the saturation temperature of water is 170 oC. More heat energy is required to raise the temperature to the saturation point at 7 bar gauge than needed for water at atmospheric pressure. From the table a value of 720.9 kJ is needed to raise 1 kg of water from 0 oC to the saturation temperature 170 oC.

The heat energy (enthalpy of evaporation) needed at 7 bar gauge to evaporate the water to steam is actually less than the heat energy required at atmospheric pressure. The specific enthalpy of evaporation decrease with steam pressure increase. The evaporation heat is 2,047 kJ/kg according the table.

Note! Because the specific volume of steam decreases with increasing pressure, the amount of heat energy transferred in the same volume actually increases with steam pressure. In other words the same pipe may transfer more energy with high pressure steam than with low pressure steam.

Related Topics

  • Steam and Condensate - Steam & condensate properties - capacities, pipe sizing, systems configuration and more
  • Flash Steam - Flash steam generation - thermodynamic fundamentals, heat loss, energy recovery and more
  • Thermodynamics - Thermodynamics of steam and condensate applications

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