The problem of self-circulation in centrifugal compressors
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This post was last edited by sean816 on 2010-9-5 19:23. Can the outlet pressure of a centrifugal compressor reach its designed value when it operates in self-circulation mode?
Reply to 1# Mu Tou-001: What does LZ mean by self-circulating operation?
Reply: 3# YBHXSBKSGX is referring to the condition where the unit’s anti-surge valves are fully open and the inlet and outlet valves are closed
This post was last edited and replied to by Kuju Kyōko on 2010-9-5 15:41. Reply 1# Mokuto-001: What the original poster is asking is whether the inlet and outlet pressures can maintain an internal circulation under design conditions (or normal operating conditions) Is that so? If that’s the case, then your title “Problems with Starting Centrifugal Compressors” isn’t correct?
Please clarify, the original poster – does it refer to operation with no load while driving?
My understanding is that self-circulation can be achieved when the inlet is open to a certain extent, but to reach the specified operating parameters, the inlet must be fully open and the flow rate cannot be too low； If the inlet is not used and the head is raised, the unit deviates too much from its operating condition, making surge prone to occur; this is a typical case of low flow rate with high head.
Reply to 3# YBHXSBKSGX: The anti-surge function is enabled, but it doesn’t seem to be supplying air to the subsequent section
Reply to 5# Kuju Kyōko: Do not send air to the downstream section
Reply 6# ccbopp: The compressor is operating at full load but not supplying air to the downstream section
Reply to 5# Kuji Kyōko: I’m sorry, that’s indeed what I meant by it