Gas Turbine (GT), like other prime movers, undergoes wear and tear over time which results in performance drop as far as available power and efficiency are concerned. In addition to routine wear and tear, the engine also undergoes corrosion, fouling etc. due to the impurities it breathes in. It is standard procedure to ‘wash’ the engine from time to time to revive it. However, it is important to establish a correct schedule for the wash to ensure optimal maintenance procedure. This calls for accurate prediction of the performance degradation of the engine over time. In this paper, an error-in-variables based methodology is applied to evaluate the performance degradation of two GT engines between soak washes. These engines are LM2500+ (single spool) and RB211-24G (twin spool). The engine-air-compressor isentropic efficiency and air inlet flow rate as well as the engine heat rate and specific work are analyzed for both engines. For both engines, the compressor isentropic efficiency is found to degrade over time, while the engine heat rate correspondingly increases. The compressor air inlet flow rate and engine specific work remain mostly constant. Through a comparison between the time-history of the engine health parameters, it is found that the LM2500+ degrades at a much faster rate than the RB211-24G. However, the degradation of the LM2500+ is found to be fully recoverable by offline washes, while the degradation of the RB211-24G is only slightly recovered by offline washes. The RB211-24G engine is found to be running near its maximum efficiency at all times, which is likely the cause for the observed non-recoverable degradation that the engine experiences. The engine’s site location is also found to contribute to the degradation that the engine experiences.
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2014 10th International Pipeline Conference
September 29–October 3, 2014
Calgary, Alberta, Canada
Conference Sponsors:
- Pipeline Division
ISBN:
978-0-7918-4613-1
PROCEEDINGS PAPER
Comparison of Degradation of Two Different Gas Turbine Engines in Natural Gas Compressor Stations
C. Hartloper,
C. Hartloper
NOVA Research & Technology Center, Calgary, AB, Canada
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K. K. Botros,
K. K. Botros
NOVA Research & Technology Center, Calgary, AB, Canada
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H. Golshan,
H. Golshan
TransCanada Pipelines Ltd., Calgary, AB, Canada
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D. Rogers,
D. Rogers
TransCanada Pipelines Ltd., Calgary, AB, Canada
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Z. Samoylove
Z. Samoylove
TransCanada Pipelines Ltd., Calgary, AB, Canada
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C. Hartloper
NOVA Research & Technology Center, Calgary, AB, Canada
K. K. Botros
NOVA Research & Technology Center, Calgary, AB, Canada
H. Golshan
TransCanada Pipelines Ltd., Calgary, AB, Canada
D. Rogers
TransCanada Pipelines Ltd., Calgary, AB, Canada
Z. Samoylove
TransCanada Pipelines Ltd., Calgary, AB, Canada
Paper No:
IPC2014-33015, V004T05A001; 18 pages
Published Online:
December 9, 2014
Citation
Hartloper, C, Botros, KK, Golshan, H, Rogers, D, & Samoylove, Z. "Comparison of Degradation of Two Different Gas Turbine Engines in Natural Gas Compressor Stations." Proceedings of the 2014 10th International Pipeline Conference. Volume 4: Production Pipelines and Flowlines; Project Management; Facilities Integrity Management; Operations and Maintenance; Pipelining in Northern and Offshore Environments; Strain-Based Design; Standards and Regulations. Calgary, Alberta, Canada. September 29–October 3, 2014. V004T05A001. ASME. https://doi.org/10.1115/IPC2014-33015
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