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Exergy analysis of gas turbine with air bottoming cycle

Author

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  • Ghazikhani, M.
  • Khazaee, I.
  • Abdekhodaie, E.

Abstract

In this paper, the exergy analysis of a conventional gas turbine and a gas turbine with air bottoming cycle (ABC) is presented in order to study the important parameters involved in improving the performance characteristics of the ABC based on the Second Law of thermodynamics. In this study, work output, specific fuel consumption (SFC) and the exergy destruction of the components are investigated using a computer model. The variations of the ABC cycle exergy parameters are comprehensively discussed and compared with those of the simple gas turbine. The results indicate that the amount of the exhaust exergy recovery in different operating conditions varies between 8.6 and 14.1% of the fuel exergy, while the exergy destruction due to the extra components in the ABC makes up only 4.7–7.4% of the fuel exergy. This is the reason why the SFC of the ABC is averagely 13.3% less and the specific work 15.4% more than those of the simple gas turbine. The results also reveal that in the ABC cycle, at a small value of pressure ratio, a higher specific work with lower SFC can be achieved in comparison with those of the simple gas turbine.

Suggested Citation

  • Ghazikhani, M. & Khazaee, I. & Abdekhodaie, E., 2014. "Exergy analysis of gas turbine with air bottoming cycle," Energy, Elsevier, vol. 72(C), pages 599-607.
    • Handle: RePEc:eee:energy:v:72:y:2014:i:c:p:599-607
    DOI: 10.1016/j.energy.2014.05.085
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    References listed on IDEAS

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    1. Poullikkas, Andreas, 2005. "An overview of current and future sustainable gas turbine technologies," Renewable and Sustainable Energy Reviews, Elsevier, vol. 9(5), pages 409-443, October.
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    2. Şöhret, Yasin & Açıkkalp, Emin & Hepbasli, Arif & Karakoc, T. Hikmet, 2015. "Advanced exergy analysis of an aircraft gas turbine engine: Splitting exergy destructions into parts," Energy, Elsevier, vol. 90(P2), pages 1219-1228.
    3. Shehata, Ahmed S. & Xiao, Qing & Selim, Mohamed M. & Elbatran, A.H. & Alexander, Day, 2017. "Enhancement of performance of wave turbine during stall using passive flow control: First and second law analysis," Renewable Energy, Elsevier, vol. 113(C), pages 369-392.
    4. Fan, Guangli & Ahmadi, A. & Ehyaei, M.A. & Das, Biplab, 2021. "Energy, exergy, economic and exergoenvironmental analyses of polygeneration system integrated gas cycle, absorption chiller, and Copper-Chlorine thermochemical cycle to produce power, cooling, and hyd," Energy, Elsevier, vol. 222(C).
    5. Mahmood, Muhammad H. & Sultan, Muhammad & Miyazaki, Takahiko & Koyama, Shigeru & Maisotsenko, Valeriy S., 2016. "Overview of the Maisotsenko cycle – A way towards dew point evaporative cooling," Renewable and Sustainable Energy Reviews, Elsevier, vol. 66(C), pages 537-555.
    6. Alklaibi, A.M. & Khan, M.N. & Khan, W.A., 2016. "Thermodynamic analysis of gas turbine with air bottoming cycle," Energy, Elsevier, vol. 107(C), pages 603-611.
    7. Mossi Idrissa, A.K. & Goni Boulama, K., 2019. "Advanced exergy analysis of a combined Brayton/Brayton power cycle," Energy, Elsevier, vol. 166(C), pages 724-737.

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