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Comprehensive Thermodynamic Analysis of the Humphrey Cycle for Gas Turbines with Pressure Gain Combustion

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  • Panagiotis Stathopoulos

    (Chair of Unsteady Thermodynamics in Gas Turbine Processes, Hermann Föttinger Institute, Technische Universität Berlin, Müller Breslau Str. 8, 10623 Berlin, Germany)

Abstract

Conventional gas turbines are approaching their efficiency limits and performance gains are becoming increasingly difficult to achieve. Pressure Gain Combustion (PGC) has emerged as a very promising technology in this respect, due to the higher thermal efficiency of the respective ideal gas turbine thermodynamic cycles. Up to date, only very simplified models of open cycle gas turbines with pressure gain combustion have been considered. However, the integration of a fundamentally different combustion technology will be inherently connected with additional losses. Entropy generation in the combustion process, combustor inlet pressure loss (a central issue for pressure gain combustors), and the impact of PGC on the secondary air system (especially blade cooling) are all very important parameters that have been neglected. The current work uses the Humphrey cycle in an attempt to address all these issues in order to provide gas turbine component designers with benchmark efficiency values for individual components of gas turbines with PGC. The analysis concludes with some recommendations for the best strategy to integrate turbine expanders with PGC combustors. This is done from a purely thermodynamic point of view, again with the goal to deliver design benchmark values for a more realistic interpretation of the cycle.

Suggested Citation

  • Panagiotis Stathopoulos, 2018. "Comprehensive Thermodynamic Analysis of the Humphrey Cycle for Gas Turbines with Pressure Gain Combustion," Energies, MDPI, vol. 11(12), pages 1-21, December.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:12:p:3521-:d:191329
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    References listed on IDEAS

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    1. Stathopoulos, P. & Paschereit, C.O., 2015. "Retrofitting micro gas turbines for wet operation. A way to increase operational flexibility in distributed CHP plants," Applied Energy, Elsevier, vol. 154(C), pages 438-446.
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    Cited by:

    1. Sandip Dutta & Inderjot Kaur & Prashant Singh, 2022. "Review of Film Cooling in Gas Turbines with an Emphasis on Additive Manufacturing-Based Design Evolutions," Energies, MDPI, vol. 15(19), pages 1-35, September.
    2. Salvatore Carusotto & Prashant Goel & Mirko Baratta & Daniela Anna Misul & Simone Salvadori & Francesco Cardile & Luca Forno & Marco Toppino & Massimo Valsania, 2022. "Combustion Characterization in a Diffusive Gas Turbine Burner for Hydrogen-Compliant Applications," Energies, MDPI, vol. 15(11), pages 1-20, June.
    3. Simeon Dybe & Michael Bartlett & Jens Pålsson & Panagiotis Stathopoulos, 2021. "TopCycle: A Novel High Performance and Fuel Flexible Gas Turbine Cycle," Sustainability, MDPI, vol. 13(2), pages 1-18, January.
    4. Stathopoulos, Panagiotis & Rähse, Tim & Vinkeloe, Johann & Djordjevic, Neda, 2020. "First law thermodynamic analysis of the recuperated humphrey cycle for gas turbines with pressure gain combustion," Energy, Elsevier, vol. 200(C).
    5. Matteo Marchionni & Roberto Cipollone, 2023. "Liquid CO 2 and Liquid Air Energy Storage Systems: A Thermodynamic Analysis," Energies, MDPI, vol. 16(13), pages 1-21, June.

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