Will Centrifugal Compressor Pulls Vacuum at Suction
Will Centrifugal Compressor Pulls Vacuum at Suction
(OP)
Hi,
I am a process engineer and I would like to know when a centrifugal compressor suction is blocked, will the compressor pulls vacuum at its suction?
I have heard that a reciprocating compressor will create vacuum at its suction, is this true?
Please help.
Thanks.
I am a process engineer and I would like to know when a centrifugal compressor suction is blocked, will the compressor pulls vacuum at its suction?
I have heard that a reciprocating compressor will create vacuum at its suction, is this true?
Please help.
Thanks.





RE: Will Centrifugal Compressor Pulls Vacuum at Suction
Like an airplane wing, a certain gas density and speed combination is required to begin to develop useful lift, or impart work to the gas being compressed.
"People will work for you with blood and sweat and tears if they work for what they believe in......" - Simon Sinek
RE: Will Centrifugal Compressor Pulls Vacuum at Suction
For a PD compressor, it is going to try to move the same volume every cycle. With a recip, you will quickly reach the point that you don't have enough dP to open the suction valves and the piston will just slide up and down until the cylinder melts from windage losses. It won't pull much of a vacuum in the shut-suction scenario. A flooded screw doesn't have valves, and the oil flood keeps considerable mass flowing through the process so it will just keep dropping suction pressure into a deep vacuum. When it runs out of anything to compress it will just recycle oil at a decreasing discharge pressure (machines without an oil pump will lose the driving force for oil and will eat themselves, machines with an oil pump will probably keep running).
David Simpson, PE
MuleShoe Engineering
"Belief" is the acceptance of an hypotheses in the absence of data.
"Prejudice" is having an opinion not supported by the preponderance of the data.
"Knowledge" is only found through the accumulation and analysis of data.
RE: Will Centrifugal Compressor Pulls Vacuum at Suction
Best regards
Morten
RE: Will Centrifugal Compressor Pulls Vacuum at Suction
David Simpson, PE
MuleShoe Engineering
"Belief" is the acceptance of an hypotheses in the absence of data.
"Prejudice" is having an opinion not supported by the preponderance of the data.
"Knowledge" is only found through the accumulation and analysis of data.