Simulation of a Multistage Compressor at Low Load Operation with Additional Bleed Air Extraction for Minimum Environmental Load Reduction

نویسندگان

چکیده

The need for more flexible operation of gas-fired power plants has led manufacturers to exploit possibilities retrofit existing systems and increase turndown capabilities, lowering the minimum environmental load (MEL) - lowest output at which unit can operate still meet emissions limits. A possible measure compressor enable a reduced MEL is extract significant mass flow rates through bleed ports in with closed IGV lower entering combustor, enabling further reduction while maintaining emissions. For this be implemented, stable ensured conditions. It well known that bleed-air offtake full speed shifts loading towards rear stages compressor. At MEL, already an increased compared base-load. Therefore, confirm viability as strategy, effects on performance stability have quantified MEL. Of particular interest how air extraction influences especially when from low pressure. Information degradation margin due additional gained numerical simulations. Full-compressor CFD simulations F-class gas turbine conditions are performed. influence several geometrical modeling details studied, model validated against comprehensive set experimental data. results show good agreement data, even extraction. concluded capable method reducing discharge rate significantly. limited by last stages. To verify integrity whole GT under such conditions, e.g., thermal state hot parts, analysis should

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ژورنال

عنوان ژورنال: Proceedings

سال: 2022

ISSN: ['0890-1740']

DOI: https://doi.org/10.33737/gpps22-tc-96