What are the specific meanings of supercritical and ultra-supercritical in power plants
Release Date:
2021-04-09
Refers to the parameters of the thermal system of the generator set. The critical parameter point of water is 22.12MPA, 374.12 degrees. Below this parameter, it belongs to subcritical, and above this parameter belongs to supercritical.
Refers to the parameters of the thermal system of the generator set. The critical parameter point of water is 22.12MPA, 374.12 degrees. Below this parameter, it belongs to subcritical, and above this parameter belongs to supercritical.
After the critical state, the specific gravity of water and steam are the same. Natural circulation cannot be used for boiler heating, and forced circulation must be used.
For the thermal equipment boilers and steam turbines of generator sets, the rated steam parameters exceeding 22.12MPA are supercritical. However, the steam pressure of general supercritical sets is above 24MPA and the temperature is not high, so it is still maintained at 545 degrees and 550 degrees. .
The steam pressure of the ultra-supercritical unit is a little higher than 25Mpa, and the temperature has a big leap, reaching 600 degrees. This is the specific meaning of supercritical and ultra-supercritical.
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