What’s the use of evacuating a steam turbine?
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This post was last edited by springpang on 2015-10-20 06:15. What’s the use of evacuating a diesel hydrogenation turbine compressor? ? What’s the principle? ? I would appreciate it if a master could explain this, thank you
The purpose of evacuating the vacuum is to allow steam to be discharged at a lower pressure, thereby increasing the effective enthalpy drop of the steam and improving the efficiency of the turbine. Vacuum is generally created using a vacuum pump. Small units can also be evacuated using water jet or steam jet ejectors.
For diesel hydrogenation, it should be a circulating hydrogen compressor. Is the turbine a back-pressure turbine? If so, the device used for vacuum creation is likely the turbine seal cooler, which serves to recover the air that leaks from the turbine seals； The configuration consists of a steam ejector, two-stage coolers, and a drainage system.
Both of those upstairs have already said it, so I don’t have much to add.
Solve: What type of back-pressure steam turbine is it?
Vacuum extraction in steam turbines is typically used in fully condensed reheat steam turbines. The purpose of this is, on one hand, to ensure an effective seal in order to maintain the proper temperature of the steam seals; on the other hand, it aims to improve the efficiency of the turbine’s operation. This is achieved by maintaining an effective negative pressure in the heat sink, which increases the effective enthalpy drop and thus enhances energy absorption and conversion, leading to higher operational efficiency.
The back pressure is lower, resulting in a higher utilization efficiency of the power steam
Engineering Thermodynamics, Rankine cycle, vacuum extraction to reduce exhaust steam temperature and improve cycle thermal efficiency