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GT Internal Cooling

GT Internal Cooling

GT Internal Cooling

(OP)
Experts,

Obviously answers to this question will be somewhat turbine specific, but I am after a ball park figure.

What percentage of the total air mass flow rate through the compressor is extracted for use cooling the bucket internal passages?

I have heard reference to 1-2% per stage, which is believable, but also reference to 10%+ per stage.

Thanks

 

RE: GT Internal Cooling

Per EPRI, a 11 hole stage has 1.4% cooling flow.  GE unit.

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