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Supercharged gas turbine combined cycle: An improvement in plant flexibility and efficiency

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  • Barelli, Linda
  • Ottaviano, Andrea

Abstract

This paper shows an innovative combined cycle solution that allows to increase the plant operational flexibility improving, at the same time, its global efficiency in part-load operation. In fact, nowadays, the necessity to maintain a high plant performance in prospect to fluctuating energy demand from electric grid has become a very critical problem in the energy sector. The solution here presented is characterized by a supercharged gas turbine, with an innovative control strategy, integrated in a conventional NGCC (natural gas combined cycle). This proposed solution, called SNGCC (supercharged conventional natural gas combined cycle), with an additional compressor stage upstream of the GT (gas turbine) cycle, has allowed to achieve, during part-load operation, significantly higher efficiency respect to conventional natural gas combined cycle. Consequently, also the possible operation range is extended.

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  • Barelli, Linda & Ottaviano, Andrea, 2015. "Supercharged gas turbine combined cycle: An improvement in plant flexibility and efficiency," Energy, Elsevier, vol. 81(C), pages 615-626.
    • Handle: RePEc:eee:energy:v:81:y:2015:i:c:p:615-626
    DOI: 10.1016/j.energy.2015.01.004
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    6. Barelli, L. & Bidini, G. & Ottaviano, A., 2015. "Hydromethane generation through SOE (solid oxide electrolyser): Advantages of H2O–CO2 co-electrolysis," Energy, Elsevier, vol. 90(P1), pages 1180-1191.
    7. Taimoor, Aqeel Ahmad & Muhammad, Ayyaz & Saleem, Waqas & Zain-ul-abdein, Muhammad, 2016. "Humidified exhaust recirculation for efficient combined cycle gas turbines," Energy, Elsevier, vol. 106(C), pages 356-366.
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    9. Kotowicz, Janusz & Brzęczek, Mateusz, 2019. "Comprehensive multivariable analysis of the possibility of an increase in the electrical efficiency of a modern combined cycle power plant with and without a CO2 capture and compression installations ," Energy, Elsevier, vol. 175(C), pages 1100-1120.
    10. Yang, Yongping & Bai, Ziwei & Zhang, Guoqiang & Li, Yongyi & Wang, Ziyu & Yu, Guangying, 2019. "Design/off-design performance simulation and discussion for the gas turbine combined cycle with inlet air heating," Energy, Elsevier, vol. 178(C), pages 386-399.
    11. Xiao, Runke & Yang, Cheng & Qi, Hanjie & Ma, Xiaoqian, 2023. "Synergetic performance of gas turbine combined cycle unit with inlet cooled by quasi-isobaric ACAES exhaust," Applied Energy, Elsevier, vol. 352(C).
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