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Application of exergy balances for the optimization of non-adiabatic small turbomachines operation

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  • Diango, A.
  • Perilhon, C.
  • Descombes, G.
  • Danho, E.

Abstract

In the current context of global warming due to CO2 (carbon dioxide) emissions, mainly produced by power plants and road transportation, it is imperative to optimize the operation of thermal engines in general and of gas turbines in particular. This requires accurate knowledge of their performance. In the case of turbomachines, performance is usually estimated by assuming an adiabatic flow. This assumption is inappropriate, however, for small-scale machines such as turbochargers and micro gas turbines. This study presents the influence of heat transfer on their performance. The concept of entropic temperature is developed and a general exergy analysis conducted in order to quantify accurately the available energy dissipation. Both a turbocharger and a gas turbine with internal heat transfer are investigated. Under the adiabatic assumption, the model results are overestimated. New gas turbine maps have therefore been generated and new operating points defined. The trends of the modeling results thus obtained are compared with the performance measured on a micro gas turbine with and without insulation. Fuel consumption is higher with internal heat transfer.

Suggested Citation

  • Diango, A. & Perilhon, C. & Descombes, G. & Danho, E., 2011. "Application of exergy balances for the optimization of non-adiabatic small turbomachines operation," Energy, Elsevier, vol. 36(5), pages 2924-2936.
    • Handle: RePEc:eee:energy:v:36:y:2011:i:5:p:2924-2936
    DOI: 10.1016/j.energy.2011.02.035
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    References listed on IDEAS

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    1. Schiffmann, J. & Favrat, D., 2010. "Design, experimental investigation and multi-objective optimization of a small-scale radial compressor for heat pump applications," Energy, Elsevier, vol. 35(1), pages 436-450.
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    Cited by:

    1. Turan, Onder, 2012. "Exergetic effects of some design parameters on the small turbojet engine for unmanned air vehicle applications," Energy, Elsevier, vol. 46(1), pages 51-61.
    2. Sebastián, Andrés & Abbas, Rubén & Valdés, Manuel, 2021. "Analytical prediction of Reynolds-number effects on miniaturized centrifugal compressors under off-design conditions," Energy, Elsevier, vol. 227(C).
    3. Sina Kazemi Bakhshmand & Ly Tai Luu & Clemens Biet, 2021. "Experimental Energy and Exergy Analysis of an Automotive Turbocharger Using a Novel Power-Based Approach," Energies, MDPI, vol. 14(20), pages 1-15, October.
    4. Deligant, M. & Podevin, P. & Descombes, G., 2012. "Experimental identification of turbocharger mechanical friction losses," Energy, Elsevier, vol. 39(1), pages 388-394.
    5. Serrano, José Ramón & Olmeda, Pablo & Tiseira, Andrés & García-Cuevas, Luis Miguel & Lefebvre, Alain, 2013. "Theoretical and experimental study of mechanical losses in automotive turbochargers," Energy, Elsevier, vol. 55(C), pages 888-898.
    6. Atılgan, Ramazan & Turan, Önder & Altuntaş, Önder & Aydın, Hakan & Synylo, Kateryna, 2013. "Environmental impact assessment of a turboprop engine with the aid of exergy," Energy, Elsevier, vol. 58(C), pages 664-671.
    7. Turan, Onder, 2015. "An exergy way to quantify sustainability metrics for a high bypass turbofan engine," Energy, Elsevier, vol. 86(C), pages 722-736.
    8. Aydın, Hakan & Turan, Önder & Karakoç, T. Hikmet & Midilli, Adnan, 2013. "Exergo-sustainability indicators of a turboprop aircraft for the phases of a flight," Energy, Elsevier, vol. 58(C), pages 550-560.

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