3 replies to this topic

[abel]

I read somewhere that "increase in power generation may be gained by steam extraction from many turbine stages and reduction of turbine condensate".
My simple understanding is that the greater the steam supply (considering constant extraction flowrate) the higher will be output power. Anyone who can help me on this?
My system considers 67 bar, 485°C at 55 TPH inlet steam to a condensing cum extraction turbine with 2 extraction sites (10 bar and 5 bar). We expect to produce at least 8MW power.

[Art Montemayor]

Abel:

Please STOP MAKING DUPLICATE POSTINGS of the same subject. Read the Forum Guidelines regarding the rules of posting.

I am responding to this thread (instead of responding to the other one on this same Forum - which one do YOU expect us to respond to? Do you grasp the dilemma that you put responders under? How and where do we respond?) and am not deleting your other thread - yet! Tell me which one to delete in order to have your responses in one of them.

Await your reply. If you don't reply, I'll be forced to delete BOTH threads.

[abel]

Art,

Thanks for reminding me. It's my first post and maybe just got too excited.
I will keep this thread and you may delete the other one.

[djack77494]

I read somewhere that "increase in power generation may be gained by steam extraction from many turbine stages and reduction of turbine condensate".
My simple understanding is that the greater the steam supply (considering constant extraction flowrate) the higher will be output power. Anyone who can help me on this?
My system considers 67 bar, 485°C at 55 TPH inlet steam to a condensing cum extraction turbine with 2 extraction sites (10 bar and 5 bar). We expect to produce at least 8MW power.

I'm not clear on how to interpret your query. Generally, the higher the inlet steam pressure and temperature, the more power will be produced. Likewise, the lower the turbine outlet pressure and temperature, the more power is produced. Biggest efficiency gains are in the areas of superheating the incoming steam and subcooling (condensing) a portion of the exhaust steam. Extracting steam is merely removing a portion of the steam partway through the cycle. The steam that is extracted has not yet "given up" its full energy content, and so the efficiency is less than the maximum. If you have a good use for the extracted steam, then this is not a problem.