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Engineering ToolBox > Entropy of Superheated Steam
The table below can be used to find superheated steam entropy at different pressures and temperatures.
| Entropy of Superheated Steam (kJ/kgK) | |||||||||
| Absolute pressure | Saturation temperature (oC) | Steam Temperature (oC) | |||||||
| (kN/m2) | (bar) | 120 | 150 | 180 | 200 | 230 | 250 | 280 | |
| 150 | 1.5 | 111.4 | 7.239 | 7.419 | 7.557 | 7.644 | 7.767 | 7.845 | 7.957 |
| 200 | 2 | 120.2 | 7.279 | 7.420 | 7.507 | 7.631 | 7.710 | 7.822 | |
| 250 | 2.5 | 127.4 | 7.169 | 7.311 | 7.400 | 7.525 | 7.604 | 7.717 | |
| 350 | 3.5 | 138.9 | 6.998 | 7.146 | 7.237 | 7.364 | 7.444 | 7.558 | |
| 400 | 4 | 143.6 | 6.929 | 7.079 | 7.171 | 7.299 | 7.380 | 7.495 | |
| 500 | 5 | 151.8 | 6.965 | 7.059 | 7.190 | 7.272 | 7.388 | ||
| 600 | 6 | 158.8 | 6.869 | 6.966 | 7.100 | 7.183 | 7.300 | ||
| 700 | 7 | 165.0 | 6.786 | 6.886 | 7.022 | 7.107 | 7.225 | ||
| 800 | 8 | 170.4 | 6.712 | 6.815 | 6.954 | 7.040 | 7.156 | ||
| 900 | 9 | 175.4 | 6.645 | 6.751 | 6.893 | 6.980 | 7.101 | ||
| 1000 | 10 | 179.9 | 6.584 | 6.692 | 6.838 | 6.926 | 7.049 | ||
| 1100 | 11 | 184.4 | 6.638 | 6.787 | 6.876 | 7.001 | |||
| 1200 | 12 | 188.0 | 6.587 | 6.739 | 6.831 | 6.956 | |||
| 1400 | 14 | 195.0 | 6.494 | 6.653 | 6.748 | 6.877 | |||
| 1600 | 16 | 201.4 | 6.577 | 6.674 | 6.806 | ||||
| 2000 | 20 | 212.4 | 6.440 | 6.546 | 6.685 | ||||
| 2500 | 25 | 223.9 | 6.292 | 6.407 | 6.558 | ||||
| 3500 | 35 | 242.5 | 6.173 | 6.349 | |||||
If saturated steam is exposed to a surface with a higher temperature, its temperature will increase above the evaporating temperature. The steam is then described as superheated by the temperature degrees above saturation temperature.
Superheated steam is produced by passing saturated steam through an additional heat exchanger.
Superheated steam is also called