September 2009 Vol. 236 No. 9


Compressor Surge Control: Design And Modeling For Performance Verification

When a compressor reaches its surge condition, it loses the ability to maintain peak head and the entire system becomes unstable. Surge is most accurately described as a system phenomenon – not a localized instability. Under normal conditions, the compressor operates to the right of the surge line. Compressor surge is sometimes viewed as a common occurrence but design of a proper surge control system should be regarded as both a necessary design practice and an effective risk-mitigation measure. The surge-control system is an important element in the compressor system because it protects the compressor from surge over the range of compressor operations. Protection of the

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