Pressure pulsations into a centrifugal compressor can move its operating point into surge. This is concerning in pipeline stations where centrifugal compressors operate in series/parallel with reciprocating compressors. Sparks (1983), Kurz et al., (2006), and Brun et al., (2014) provided predictions on the impact of periodic pressure pulsation on the behavior of a centrifugal compressor. This interaction is known as the “Compressor Dynamic Response” (CDR) theory. Although the CDR describes the impact of the nearby piping system on the compressor surge and pulsation amplification, it has limited usefulness as a quantitative analysis tool, due to the lack of prediction tools and test data for comparison. Testing of compressor mixed operation was performed in an air loop to quantify the impact of periodic pressure pulsation from a reciprocating compressor on the surge margin of a centrifugal compressor. This data was utilized to validate predictions from Sparks' CDR theory and Brun's numerical approach. A 50 hp single-stage, double-acting reciprocating compressor provided inlet pulsations into a two-stage 700 hp centrifugal compressor. Tests were performed over a range of pulsation excitation amplitudes, frequencies, and pipe geometry variations to determine the impact of piping impedance and resonance responses. Results provided clear evidence that pulsations can reduce the surge margin of centrifugal compressors and that geometry of the piping system immediately upstream and downstream of a centrifugal compressor will have an impact on the surge margin reduction. Surge margin reductions of <30% were observed for high centrifugal compressor inlet suction pulsation.
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Research-Article
The Impact of Reciprocating Compressor Pulsations on the Surge Margin of Centrifugal Compressors
Accepted Manuscript
Klaus Brun,
Rainer Kurz,
Sarah Simons
Sarah Simons
Southwest Research Institute
[email protected]
[email protected]
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Klaus Brun
Southwest Research Institute
[email protected]
[email protected]
Rainer Kurz
Solar Turbines, Inc.
[email protected]
[email protected]
Sarah Simons
Southwest Research Institute
[email protected]
[email protected]
1Corresponding author.
J. Eng. Gas Turbines Power.
Published Online: July 27, 2016
Article history
Received:
June 23, 2016
Revised:
July 5, 2016
Citation
Brun, K., Kurz, R., and Simons, S. (July 27, 2016). "The Impact of Reciprocating Compressor Pulsations on the Surge Margin of Centrifugal Compressors." ASME. J. Eng. Gas Turbines Power. doi: https://doi.org/10.1115/1.4034314
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