Modelling of pressure pulsation in gas compressor station

doi:10.21495/91-8-913

Engineering Mechanics

2018

DOI: 10.21495/91-8-913

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Modelling of pressure pulsation in gas compressor station

Abstract: The paper presents a mathematical model for evaluating pressure pulsation propagation of gas in a pipeline system. The calculations were performed for a natural gas compressor station, in which pressure pulsation was excited by a double-cylinder reciprocating compressor. The mathematical model was based on the acoustic plane wave theory and solved in the frequency domain. The simulation results were compared with experimental test measurements of dynamic pressure changes in the gas installation.

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Cited by 3 publications

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Vibration analysis and reduction optimization study of a reciprocating compressor piping system under multi-boundary coupling

Zhang

Huang

Chen

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part E:

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In response to the characteristics of variable working conditions of shale gas extraction, in order to ensure the operational safety of shale gas compressors, this paper takes a certain type of shale gas compressor piping system in Weiyuan as the research object. Based on the plane wave theory and vibration theory, the research on the distribution law of gas pulsation of the piping system and the vibration characteristics under multi-boundary coupling was carried out, and the area of gas pulsation exceeded and the part of amplitude exceeding the piping system were locked. The vibration test of the piping system was carried out and the results showed that the amplitude of the piping system exceeded the standard and the agreement between the test and simulation results was high, which verified the correctness of the simulation model. In response to the problem of excessive vibration of the piping system, orifice plate aperture ratio orthogonal test and piping system structure optimization were carried out. After optimization, the amplitude of gas pulsation and vibration was significantly reduced, and they all met the requirements of the API 618 standard, which reduced the risk of structural damage to the piping system and improved the reliability and safety of the shale gas compressor unit.

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Vibration analysis and reduction optimization study of a reciprocating compressor piping system under multi-boundary coupling

Zhang

Huang

Chen

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part E:

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Assessment of the electrical conductivity of thermally activated water jets containing injections of inhibiting salt used to extinguish electrical equipment at gas compressor stations

Roenko¹,

Chistyakov

Tarakanov³

et al. 2021

Požarovzryvobezopasnostʹ

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Introduction. One of the main problems of fire extinguishing at gas compressor stations is fires in confined spaces where electrical installations can be under voltage. To extinguish these fires, the co-authors propose to use jets of thermally activated water containing salts that inhibit burning. It is necessary to assess the electrical conductivity of water jets to prevent the exposure of fire-fighting units to electrical injuries.Materials and methods. In the experimental study, the principal electricity measuring instrument is digital dc megaohmmeter M4122U, which takes readings if operated from a laptop. The flow rate was measured using IT 2518 measurement complex and TDR14–2–3 primary flow converter of the turbine type. Termit T-35 hardness converter performed electromagnetic water treatment.Theoretical fundamentals. Measurements of leakage currents in jets of thermally activated water, fed through fire nozzles mounted onto a multi-purpose fire truck, were taken, and the maximum permissible distance to an electrical installation was determined experimentally and analytically using an experimental stand.Results and discussions. Averaged values of resistance of a jet of thermally activated water fed from a long-range nozzle at control points do not leave the confidence corridor with a probability of 0.95, which means that they do not cause a significant change in dc resistance. Inhibiting salt, injected into the water, reduces the resistance of jets of thermally activated water by no more than 2–3 % compared to under-heated water. The treatment of the inhibiting salt, injected into the under-heated water, using Termit T-35 hardness converter, does not significantly change the resistance of thermally activated water jets.Conclusions. It is theoretically and experimentally proved that the injection of inhibiting salts into the underheated water, as well as the electromagnetic treatment of water using low-power stiffness converters, do not significantly affect the electrical conductivity of jets of thermally activated water if compared to jets that contain no inhibiting admixtures. The extinguishing of surfaces of electrical installations using jets of thermally activated water containing flame inhibiting injections of salts, as well as the development of an inerting concentration in confined spaces of gas compressor stations is electrically safe for any person engaged in fire extinguishing.

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Evaluation Method of Impact of Gas-Motor Compressor Designs on the Amplitude of Gas Pulsations in Discharge Lines

Baghirov¹

2022

PAHTEI

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The article is dedicated to analysis of effects of gas communication constructions on pulsation amplitude which originates from periodic work of gas-motor compressors. The objects of research are the types of gas-motor compressors MKS12/(75-85)-(85-180) and 10GKNAM1/(50-53)-(70-125)/90-(125-150). A design technique and construction of diagram of gas entrance to buffer capacity of a compressor, which allows the estimation the dynamic processes in gas brace was given. The method is based on the design of a quantity of a gas portion entering the buffer capacity in equal interval of time. Due to the built diagrams the analysis of dynamics of gas movement in buffer capacity and gas pipelines is carried out. This technique is recommended to be used at a choice of the compressor equipment for concrete pressure regimes and productivity. The analysis of influence of a design of gas-motor compressor’s buffer capacity on amplitude of pulsations was carried out. Keywords: gas-motor-compressor, amplitude of pulsation, the piston compressor, the buffer capacity, compressor cylinder, design method.

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Modelling of pressure pulsation in gas compressor station

Cited by 3 publications

References 3 publications

Vibration analysis and reduction optimization study of a reciprocating compressor piping system under multi-boundary coupling

Vibration analysis and reduction optimization study of a reciprocating compressor piping system under multi-boundary coupling

Assessment of the electrical conductivity of thermally activated water jets containing injections of inhibiting salt used to extinguish electrical equipment at gas compressor stations

Evaluation Method of Impact of Gas-Motor Compressor Designs on the Amplitude of Gas Pulsations in Discharge Lines

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