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Language: English

Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received July 19, 2015
Accepted October 17, 2015

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Case study of surge avoidance design for centrifugal compressor systems during emergency shut-down (ESD)

Se-jin Pak Ju Woung Yoon Seojin Kim Felicia Salim Jaihyo Lee¹ In-Won Kim^†

Department of Chemical Engineering, Konkuk University, 120, Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea ¹Department of Mechanical Engineering, Konkuk University, 120, Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea

inwon@konkuk.ac.kr

Korean Journal of Chemical Engineering, March 2016, 33(3), 764-774(11), 10.1007/s11814-015-0219-3

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Abstract

Compression systems with centrifugal compressors are widely used in gas involving processes. Surge protection system design is crucial in avoiding any damage in abnormal circumstances such as emergency shutdown (ESD), start-up, coast-down operation, and normal shutdown. We analyzed four cases of existing centrifugal compressor systems, three CO2 compression systems and one off-gas compression system, to study the surge protection availability during ESD. All compression systems were working well at normal operating condition, but some systems could not avoid surge during ESD. To check the surge cases, the surge criteria flowchart was suggested and surge analysis through dynamic simulation was done using a commercial process simulator. To avoid a surge during ESD, a sensitivity analysis was done while considering the following process parameters: pre-stroke time, anti-surge valve (ASV) type, capacity, and stroke time. We optimized ASV design using response surface method with two selected parameters from the sensitivity study, ASV capacity and stroke time. Finally, the installation of the hot gas recycle system was analyzed to avoid surge occurrence.

Keywords

Compression System Compressor Surge Emergency Shutdown (ESD) Surge Protection Dynamic Simulation

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