August 2010

Special Report: Fluid Flow and Rotating Equipment

How the inertia number points to compressor system design challenges

It facilitates predicting compressor system performance

A faulty compressor system design could result in poor machine selection and incorrect antisurge valve sizing. Flawed designs of compressor systems could lead to erroneous determination of the relief loads for flare network design. This article presents a comprehensive methodology to design a compressor system considering all potential constraints and challenges to protect the compressor from abnormal operation and emergency shutdowns. In particular, this methodology emphasizes the influence of various components in the compressor loop, including rotating equipment performance curves, antisurge-valve dynamics, piping layout and mechanical design. The use of the inertia number provides an a

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