Modular automation cabinet for proactive monitoring in ATEX Zone 2

Nechifor, Cristian; Borzea, Claudia; Stoicescu, Adrian; Lale, Daniel; Vasile, M.

doi:10.1051/matecconf/202235400044

Cited by 5 publications

(3 citation statements)

References 6 publications

(6 reference statements)

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“…Another critical factor that has led us to the proposal of the paper was that, in the current state, manual maneuvers for decreasing the intake pressure are required to facilitate the startup of a screw compressor, such as opening the discharge valve of the station and continually purging an quantity of gas, or half-opening the manual valve placed on the station pipe to induce pressure drop, while the compressor start command is being initialized. These actions necessitate the presence of two operators and do not always guarantee that the compressor will start [9][10][11][12].…”

Section: Analysing Critical Factorsmentioning

confidence: 99%

Control system for suction valves within gas compressors skids located in potentially explosive zones

Nechifor,

Roman,

Lale

et al. 2024

MATEC Web Conf.

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The paper presents the implementation of a feedback loop controller for the suction valves used within the gas compressors skids manufactured by Romanian Research and Development Institute for Gas Turbines COMOTI. These compressors are installed at beneficiaries, in potentially explosive environments (e.g., gas extraction and transportation applications). The proposed solution addresses the problems observed due to the high suction pressures of screw compressors, which may occur at start-up or during operation, leading to failed start-ups or emergency shutdowns. An automatic sequence implemented in the control software and displayed on the operating panel, could assist the operator during high suction pressures (above 1.2 bar). These pressure conditions normally lead to alarm limits and to performing an automatic shutdown sequence for protecting the compressor. The paper herein discusses the implementation of a start-up sequence in the programmable logic controller’s software, which can be applied without critical interventions on the compressor packages, only through minor control software modifications which can safely extend the inlet pressure range and the exploitation of the compressors. Thus, since no hardware modifications are required, we also ensure maintaining the ATEX certifications of equipment and assemblies.

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Section: Analysing Critical Factorsmentioning

confidence: 99%

Control system for suction valves within gas compressors skids located in potentially explosive zones

Nechifor,

Roman,

Lale

et al. 2024

MATEC Web Conf.

Self Cite

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“…A control cabinet [17,18] was designed for the valve, for the monitoring and control of the valve, both for testing its functionality on the bench with brake simulating mechanical load (Fig. 2), as well as testing its operation on the skid (Fig.…”

Section: Overview On Valve Test Bench and Proposed Solutionmentioning

confidence: 99%

Optimizing the Electronic Control of Suction Valves for Gas Compression Units

NECHIFOR,

NĂVRĂPESCU,

TOMESCU

et al. 2023

RRST-EE

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In certain compression stations where twin-screw compressors assemblies are installed, certain operational problems have been observed when starting the assembly again after it was shut down. The downtime can vary from several minutes to a few days, depending on the shutdown causes. The gases accumulated in the compressor suction pipe can cause the inlet gas pressure to be above the typical pressure values ranging from atmospheric pressure (1 bar) to 1.5 bar. The compressor is automatically shut down via the sequences implemented in the automation control system if the pressure at the inlet of the compression unit exceeds 1.5 bar, this value being the maximum suction pressure that the compressor unit is designed to withstand. The solution introduces a potentiometer for providing feedback on the suction valve opening angle and thus optimizing the valve control to prevent the occurrence of higher pressures which may lead to failed start-ups or emergency shutdowns.

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“…Harvesting vibration energy mainly aims to eliminate cabling in the sites with difficult conditions or space constraints. A possible application would be powering sensor nodes in hazardous locations [12], where regulations are applied for using costly explosion-proof certified equipment and cabling in the field, subjected to the ATEX Directive in Europe.…”

Section: Introductionmentioning

confidence: 99%

Vibration Analysis of a Twin-Screw Compressor as a Potential Source for Piezoelectric Energy Harvesting

SĂVESCU,

PETRESCU,

COMEAGĂ

et al. 2023

RRST-EE

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The paper presents the vibration spectra of a twin-screw compressor driven at various functioning regimes. The tests are performed to assess the potential of this rotary bladed machine as energy harvesting source. It is sought to determine the optimum spots on the compressor skid where piezoelectric harvesters can be placed, meeting the operational conditions. Like most of the industrial machinery, compressors exhibit inherent vibrations and heating during operation. The pulsatory effects of the compressed air trapped between the compressor’s male and female rotors inside the compressor also give birth to harmonics. It is important to evaluate the temperatures as well since piezoelectric harvesters should preferably operate close to room temperature so as not to deteriorate the material and avoid thermal hysteresis, which can ultimately lead to the loss of piezoelectric properties. The study herein involves acquiring vibrational data and representing it graphically as vibration spectra. An analytical model is also presented for calculating the main frequencies of the compressor, validated by the experimental data measurements. We also present laboratory tests with the piezoelectric harvester tuned near the male rotor’s frequency for achieving resonance conditions. The male rotor frequency was the most stable, with the highest amplitudes and of convenient value (~83 Hz) for the tip mass required for decreasing the piezoelectric cantilever’s resonant frequency from ~210 Hz.

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Modular automation cabinet for proactive monitoring in ATEX Zone 2

Cited by 5 publications

References 6 publications

Control system for suction valves within gas compressors skids located in potentially explosive zones

Control system for suction valves within gas compressors skids located in potentially explosive zones

Optimizing the Electronic Control of Suction Valves for Gas Compression Units

Vibration Analysis of a Twin-Screw Compressor as a Potential Source for Piezoelectric Energy Harvesting

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