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Dynamic simulation of a demethanizer compression unit.

Number: 1559

Author(s) : ZARESHARIF M., HOOSHMAND J.

Summary

Centrifugal turbo-compressor systems are widely applied in refrigeration cycles and industrial chemical manufacturing plants. The design complexity of centrifugal compressor systems includes steady-state operation design and transient behavior analysis. Analyzing transient scenarios such as startup, shutdown, etc., is a significant process design step in safety analyses. The most threatening phenomenon in transient scenarios is the surge phenomenon. This phenomenon may occur due to abnormal circumstances in steady-state operations such as emergency shutdown (ESD), normal shutdown, coast-down operation, and startup. To keep these systems safe from the surge phenomenon, reliable anti-surge systems must be designed, which depends on many design factors in each plant. This study is conducted to build a turbo-compressor dynamic model as realistic as possible, especially in evaluating the compressor control system on its special operation condition in the demethanizer unit. This study is based on two scenarios (ESD and full-recycle) in six operating condition cases. The dynamic simulation results showed that the compressor operates safely and stable during emergency shutdown and full-recycle scenarios in all six operating conditions without a hot bypass valve. Suggested characteristics for the cold anti-surge valve are shown reliable performance to ensure compressor safety, and the anti-surge control system can handle the event from going into surge.

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Pages: 15 p.

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Details

  • Original title: Dynamic simulation of a demethanizer compression unit.
  • Record ID : 30030402
  • Languages: English
  • Subject: Technology
  • Source: 2022 Purdue Conferences. 26th International Compressor Engineering Conference at Purdue.
  • Publication date: 2022/07/15
  • Document available for consultation in the library of the IIR headquarters only.

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