Abstract

The operating range of process centrifugal compressors is limited by an instability range commonly called “surge”, which occurs during low flow or high head conditions and can result in extensive damage. There are high expectations to improve anti-surge systems of process compressors to increase reliability as well as energy efficiencies and performance. Practical recommendations on anti-surge system sizing, selection, configuration and design are presented. Considerations regarding stall, choke, dynamic studies, anti-surge loop configuration, recycle cooling, anti-surge valve, instruments and anti-surge system parameters are also discussed. Case studies are presented.

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