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Dynamic Analysis of Compressor Trips in the Snøhvit LNG Refrigerant Circuits

机译:snøhvitLNG制冷剂回路中压缩机行程的动态分析

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摘要

Compressors are key components in the refrigerant circuits of the Snøhvit LNG plant and contain large amounts of mechanical energy. Thus it is imperative that the control system is able to keep the compressor out of surge in case of driver trip. A dynamic process simulator describing the total LNG plant has been developed by Kongsberg Process Simulation and the simulator has been applied in the engineering phase for the design and process verification. The simulator has also been used to verify the robustness of the closed loop refrigerant circuits and to verify that the compressors are sufficiently protected after a driver trip. The presented work demonstrates  the value of dynamic simulations for verification of compressor protection systems. In addition it shows the importance of using correct data for polar inertia of the rotating equipment, as well as the opening and dead times of the anti-surge valves. It is recommended to include a sensitivity analysis of these parameters as part of plant verification studies.
机译:压缩机是Snøhvit液化天然气工厂制冷剂回路中的关键组件,包含大量机械能。因此,当驾驶员跳闸时,控制系统必须能够使压缩机保持不喘振状态。 Kongsberg Process Simulation开发了描述整个液化天然气工厂的动态过程模拟器,该模拟器已在工程阶段用于设计和过程验证。该模拟器还用于验证闭环制冷剂回路的坚固性,并验证驾驶员跳闸后是否对压缩机进行了充分的保护。提出的工作证明了动态仿真对于验证压缩机保护系统的价值。此外,它还显示了使用正确的数据用于旋转设备的极惯性以及防喘振阀的打开和死区时间的重要性。建议在工厂验证研究中包括对这些参数的敏感性分析。

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  • 作者

    Schjølberg, Ingrid;

  • 作者单位
  • 年度 2008
  • 总页数
  • 原文格式 PDF
  • 正文语种 en
  • 中图分类

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