When the turbine is shut down, the vacuum is broken
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Dear seniors, I would like to ask why it is necessary to quickly break the vacuum when shutting down this turbine? Why? Note: Exhaust-condensing steam turbine
If the vacuum is broken, the rotation speed will drop significantly. However, as the vacuum is broken, outside air also enters, causing rapid cooling inside the cylinder, which is detrimental to the safety of the unit. Therefore, during a normal shutdown, there is no need to rush to break the vacuum; it is recommended to do so only in emergency situations.
The reply on the second floor makes sense! :victory:
It means that as long as time permits, one does not deliberately disrupt the vacuum, is that right?
For a normal shutdown, the vacuum level needs to be reduced to zero, and the rotational speed must also reach zero
During normal parking, there’s no need to quickly break the vacuum; it’s only done in an emergency stop situation, to prevent air from getting in
That will cause the rotor to stop more slowly
Yes, because I see that parking here quickly breaks the vacuum
So, during the parking process, should the air extraction be stopped first, or the sealing of air?
Should the rotor be stopped first before breaking the vacuum? Is it the more correct way?