Acoustic Intensity Mapping at a Natural Gas Compression Station

Dr. Eng. Silviu Emil IONESCU1, Dr. Eng. Valentin SILIVESTRU1, Dr. Eng. Adina Cristina IONESCU1, Dr. Eng. Ilie LAŢA2, Eng. Ioan RUSU2, Eng. Adrian OSTROVEANU2, Eng. Dragos COSTEA2

Content Case study description Acoustic measurements plan Results for different operating conditions Conclusions and future action plans to reduce the noise

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1 The Romanian Research and Development Institute for Gas Turbines “COMOTI” 2 The National Gas Transmission Company “TRANSGAZ” SA Medias

Case study description

Images with the Turbo-Compressor Power Plant for Natural Gas Transportation

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inlet

outlet

outlet

compressor

outlet

Acoustic measurements plan

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Noise analysis at different operating conditions

SPL measurement

N1 [rpm] 10000 10300 10500 10700 10900 11100 11300 11500 11700 11800 11900 12000 12100 12200 12300

Measurement surfaces

Acoustic intensity mapping over a measured grid according to ISO 9614 with Acoustic Intensity Probe

N1 – Gas Turbine Engine Speed

Acoustic measurements plan

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Noise analysis at different operating conditions

99 100 101 102 103 104 105 106 107 108 109 110 111

dBA

N1 [rpm] 10000 10300 10500 10700 10900 11100 11300 11500 11700 11800 11900 12000 12100 12200 12300

N2 [rpm] 6050 6385 6667 6932 7230 7490 7809 8133 8468 8537 8723 8956 9164 9413 9636

N1 – Gas Turbine Engine Speed N2 – Centrifugal Compressor Speed

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Important frequency domain at different operating conditions Acoustic analysis results 2007

N1 [rpm] N2 [rpm] F1x [Hz] F2x [Hz] 12600 12120 2626.0 5252.0

Acoustic analysis results 2009 N1 [rpm] N2 [rpm] F1x [Hz] F2x [Hz]

13020 13440 2912.0 5824.0

Acoustic analysis results 2011 N1 [rpm] N2 [rpm] F1x [Hz] F2x [Hz]

10000 6050 1310.8 2621.7 10300 6385 1383.4 2766.8 10500 6667 1444.5 2889.0 10700 6932 1501.9 3003.9 10900 7230 1566.5 3133.0 11100 7490 1622.8 3245.7 11300 7809 1692.0 3383.9 11500 8133 1762.2 3524.3 11700 8468 1834.7 3669.5 11800 8537 1849.7 3699.4 11900 8723 1890.0 3780.0 12000 8956 1940.5 3880.9 12100 9164 1985.5 3971.1 12200 9413 2039.5 4079.0 12300 9636 2087.8 4175.6

[ID=68] Average G2 - Recording - Noise Hz;(dB(A)[2.000e-05 Pa], RMS) 1310.73 70.0 2912.9 69.7

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Important frequency domain

Results for different operating conditions

[ID=137] Average G4 12100_MIC1 - R 0 19531.3 24.9[ID=141] Average G4 12200_MIC1 - R 0 19531.3 26.8[ID=145] Average G4 12300_MIC1 - R 0 19531.3 28.7

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Ec* 106.8Ec* 109.0Ec* 108.4

Ec*

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Comparative FFT analysis at different operating conditions

Acoustic measurements plan Noise analysis at different operating conditions

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Results for different operating conditions

Measurement surfaces

Acoustic intensity mapping over a measured grid according to ISO 9614 with Acoustic Intensity Probe

Acoustic intensity mapping over a measured grid at constant operating conditions with N1 = 12300 [rpm]

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Acoustic intensity mapping over a measured grid at constant operating conditions with N1 = 12300 [rpm]

Results for different operating conditions

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Acoustic intensity mapping over a measured grid at constant operating conditions with N1 = 12300 [rpm]

Results for different operating conditions

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Acoustic intensity mapping over a measured grid at constant operating conditions with N1 = 12300 [rpm]

Results for different operating conditions

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Acoustic intensity mapping over a measured grid at constant operating conditions with N1 = 12300 [rpm]

Results for different operating conditions

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Acoustic intensity mapping over a measured grid at constant operating conditions with N1 = 12300 [rpm]

Results for different operating conditions

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Acoustic intensity mapping over a measured grid at constant operating conditions with N1 = 12300 [rpm]

Results for different operating conditions

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Acoustic intensity mapping over a measured grid at constant operating conditions with N1 = 12300 [rpm]

Results for different operating conditions

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Acoustic intensity mapping over a measured grid at constant operating conditions with N1 = 12300 [rpm]

Results for different operating conditions

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Acoustic intensity mapping over a measured grid at constant operating conditions with N1 = 12300 [rpm]

Results for different operating conditions

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Acoustic intensity mapping over a measured grid at constant operating conditions with N1 = 12300 [rpm]

Results for different operating conditions

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Acoustic intensity mapping over a measured grid at constant operating conditions with N1 = 12300 [rpm]

Results for different operating conditions

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Acoustic intensity mapping over a measured grid at constant operating conditions with N1 = 12300 [rpm]

Results for different operating conditions

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Acoustic intensity mapping over a measured grid at constant operating conditions with N1 = 12300 [rpm]

Results for different operating conditions

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Acoustic intensity mapping over a measured grid at constant operating conditions with N1 = 12300 [rpm]

Results for different operating conditions

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Acoustic intensity mapping over a measured grid at constant operating conditions with N1 = 12300 [rpm]

Results for different operating conditions

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Acoustic intensity mapping over a measured grid at constant operating conditions with N1 = 12300 [rpm]

Results for different operating conditions

[ID=85] G3 rezonanta_ACC3 - Recording - Vibration Hz; (m/s², RMS 04.05e+00

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Resonant frequency domain

Conclusions and future action plans to reduce the noise

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Conclusions and future action plans to reduce the noise

Action plans to reduce the noise

Reduce the noise on the propagation path Reduce the noise at source

Fundamental and applicative research for customized solutions based on acoustic absorption or

insulation materials

Fundamental and Applicative Research for System Redesign

Acoustic treatments

for the outlet pipeline

Modify the outlet pipeline resonance by changing the

structure and thickness

Introduce resonant cavities solutions to actively attenuate system frequencies which potentially can

amplify the noise on the outlet pipeline

Solutions implementation to reduce the noise

Thank you for your attention!

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