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Maximum-efficiency architectures for heat- and work-regenerative gas turbine engines

Author

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  • Ramakrishnan, Sankaran
  • Edwards, Christopher F.

Abstract

This study establishes maximum-efficiency architectures for heat- and work-regenerative gas turbine engines using a systematic irreversibility minimization approach. It considers engine architectures that employ two kinds of energy transfers: heat and work. It does not assume any cycle a priori (e.g., heat-recuperative reactive Brayton cycle). Instead, the maximum-efficiency architecture is directly deduced from first principles. Not surprisingly, the optimal architecture has some conventional features such as regenerative heat transfer from post-expansion combustion products to post-compression air, and external heat transfer out during compression (intercooling). But in addition it has three non-conventional features. First, unlike conventional heat recuperation heat is withdrawn between expansion turbine stages and transferred to post-compression air. Second, air is further compressed after heating. Third, compression is required to be part intercooled and part non-intercooled.

Suggested Citation

  • Ramakrishnan, Sankaran & Edwards, Christopher F., 2016. "Maximum-efficiency architectures for heat- and work-regenerative gas turbine engines," Energy, Elsevier, vol. 100(C), pages 115-128.
    • Handle: RePEc:eee:energy:v:100:y:2016:i:c:p:115-128
    DOI: 10.1016/j.energy.2016.01.044
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    References listed on IDEAS

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    1. Erbay, L. Berrin & Göktun, Selahattin & Yavuz, Hasbi, 2001. "Optimal design of the regenerative gas turbine engine with isothermal heat addition," Applied Energy, Elsevier, vol. 68(3), pages 249-264, March.
    2. Ramakrishnan, Sankaran & Edwards, Christopher F., 2014. "Maximum-efficiency architectures for steady-flow combustion engines, I: Attractor trajectory optimization approach," Energy, Elsevier, vol. 72(C), pages 44-57.
    3. Ramakrishnan, Sankaran & Edwards, Christopher F., 2014. "Unifying principles of irreversibility minimization for efficiency maximization in steady-flow chemically-reactive engines," Energy, Elsevier, vol. 68(C), pages 844-853.
    4. Caton, Jerald A, 2000. "On the destruction of availability (exergy) due to combustion processes — with specific application to internal-combustion engines," Energy, Elsevier, vol. 25(11), pages 1097-1117.
    5. Ramakrishnan, Sankaran & Edwards, Christopher F., 2014. "Maximum-efficiency architectures for steady-flow combustion engines, II: Work-regenerative gas turbine engines," Energy, Elsevier, vol. 72(C), pages 58-68.
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    Cited by:

    1. Gonca, Guven, 2017. "Exergetic and ecological performance analyses of a gas turbine system with two intercoolers and two re-heaters," Energy, Elsevier, vol. 124(C), pages 579-588.

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