Compressor stonewall
Compressor stonewall
(OP)
Is it true that stonewalling phenomenon in centrifugal compressors does not occur for lighter gases like nitrogen ?
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RE: Compressor stonewall
If the compressor was designed to compress methane to a certain pressure, with nitrogen in the unit the compressor would put up more pressure (it the same feet of head, just that feet of head time gas mole wt or density is pressure).
If the compressor was designed to move freon, then with nitrogen in the system, the unit would not put up enough pressure and would stonewall.
RE: Compressor stonewall
RE: Compressor stonewall
RE: Compressor stonewall
Surge, on the other hand, refers to the condition when the compressor is subject to extreme flow oscillations and instability; this is caused by insufficient suction flow. The minimum flow required to avoid surge increases with compressor RPM. Antisurge control systems (using very fast acting control valves) recycle flow from the discharge back to the suction to ensure that the net suction flow exceeds the minimum required, for a given RPM, to avoid surging.
RE: Compressor stonewall
The term "stonewall" is because its like a "wall of stone" with regards to capacity increase (no way around it).
Best regards
Morten
RE: Compressor stonewall