Application Of Dynamic Simulation In The Design, Operation, And Troubleshooting Of Compressor Systems.

Patel, Vinod; Feng, Jeffery; Dasgupta, S.; Ramdoss, Prakash; Wu, Jihong

doi:10.21423/r1tm0x

Cited by 3 publications

References 3 publications

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Application of Dynamic Simulation for the Design of the LNG Inlet Gas Compressor Anti-Surge Protection

Soriano,

Muñoz

2024

IOP Conf. Ser.: Mater. Sci. Eng.

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An inlet gas compressor system is simulated in Aspen HYSYS Dynamics v12.1. The emphasis of the simulation is to design the system to prevent or mitigate surges during an emergency shutdown (ESD). The dynamic simulation aims to assess the performance of the anti-surge control valve (ASCV), to add and size a cold gas bypass valve (CGBV) or hot gas bypass valve (HGBV) if the ASCV is insufficient, to determine the corresponding bypass valve size, and to select which bypass valve configuration is appropriate. An ASCV accompanied by an 8” HGBV is shown to be the recommended anti-surge protection configuration to mitigate surge due to its faster response and is more appropriate for motor-driven compressors which slow down more quickly during ESD. The ASCV provided by the compressor vendor with the recommended 8” HGBV can mitigate the effects of compressor surges during an emergency shutdown scenario.

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Application of Dynamic Simulation for the Design of the LNG Inlet Gas Compressor Anti-Surge Protection

Soriano,

Muñoz

2024

IOP Conf. Ser.: Mater. Sci. Eng.

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Dynamic Analysis of Compressor Trips in the Sno̸hvit LNG Refrigerant Circuits

Schjølberg

Hyllseth

Skofteland

et al. 2008

Volume 7: Education; Industrial and Cogeneration; Marine; Oil and Gas Applications

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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 refrigerant 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. INTRODUCTIONCompressors are key components in the refrigerant circuits of LNG plants. It is imperative that these compressors are properly protected against surge,, Compressors in surge can result in a severe damage to machinery and disturb plant regularity.One of the most serious incidents that can happen to a compressor system is a driver trip. Gas turbines and electrical motors are the most common types of compressor driver and a trip of the driver here is more serious than a process trip. This is because in a process trip the shutdown of the driver itself can be delayed until the surge protection valves have been opened. Important factors controlling the run down of the compressor after a trip are opening times of the anti-surge valves, piping layout, inlet and discharge volumes as well as the polar inertia of the rotating equipment including the compressor, gear and driver. It is essential to be able to validate that the compressor is properly protected during process upsets including the case of a driver trip.The use of dynamic models for analysing compressor transient behaviour has been addressed by several authors in various scientific journals and conference papers and has also been demonstrated by the supplier industry. Patel [1] discusses dynamic simulators as an important tool in the design and operation of compressor systems. A good overview of the scientific research within this area is given in [2].

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Study on the Flare Load Estimation of the Deethanizer using Dynamic Simulation

Park¹,

원왕연²,

신동일

2014

Korean Chemical Engineering Research

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− A flare system is a very important system that crucially affects on the process safety in chemical plants. If a flare system is designed too small, it cannot prevent catastrophic accidents of a chemical plant. On the other hand, if a flare system is designed too large, it will waste resources. Therefore, reasonable relief load estimation has been a crucial issue in the industry. American Petroleum Institute (API) suggests basic guidelines for relief load estimation, and a lot of engineering companies have developed their own relief load estimation methods that use an unbalanced heat and material method. However, these methods have to involve lots of conservative assumptions that lead to an overestimation of relief loads. In this study, the new design procedure for a flare system based on dynamic simulation was proposed in order to avoid the overestimation of relief loads. The relief load of a deethanizer process was tested to verify the performance of the proposed design procedure.

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Application Of Dynamic Simulation In The Design, Operation, And Troubleshooting Of Compressor Systems.

Cited by 3 publications

References 3 publications

Application of Dynamic Simulation for the Design of the LNG Inlet Gas Compressor Anti-Surge Protection

Application of Dynamic Simulation for the Design of the LNG Inlet Gas Compressor Anti-Surge Protection

Dynamic Analysis of Compressor Trips in the Sno̸hvit LNG Refrigerant Circuits

Study on the Flare Load Estimation of the Deethanizer using Dynamic Simulation

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