Upstream pressure control for centrifugal compressors
Upstream pressure control for centrifugal compressors
(OP)
For a fixed speed centrigugal compressor:
For upstream pressure control would throttling on the inlet or outlet of the compressor be the best with regards to operation and overall economy? Pressure range is 30-40 barg at suction and 110-120 at discharge (this is in the early engineering phase so no need to request additional info re. compressor type etc
im just asking for a general guideline)
Best regards
Morten
For upstream pressure control would throttling on the inlet or outlet of the compressor be the best with regards to operation and overall economy? Pressure range is 30-40 barg at suction and 110-120 at discharge (this is in the early engineering phase so no need to request additional info re. compressor type etc
Best regards
Morten





RE: Upstream pressure control for centrifugal compressors
I find varying rpm to be the best means of capacity control for any technology, for centrifugals the next best is a suction controller.
A discharge controller has got your applied hp between the point you're controlling and the control device. Shutting it down will tend to raise both suction pressure and discharge pressure (until you run out of power). Most times that I see a discharge controller, people are trying to do something like minimizing the dP across a VI plate in a flooded screw to try to minimize oil loss (by the way it is better to change the VI plate than to do this).
David Simpson, PE
MuleShoe Engineering
www.muleshoe-eng.com
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
The Plural of "anecdote" is not "data"
RE: Upstream pressure control for centrifugal compressors
RE: Upstream pressure control for centrifugal compressors