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Methodologies for predicting the part-load performance of aero-derivative gas turbines

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  • Haglind, F.
  • Elmegaard, B.

Abstract

Prediction of the part-load performance of gas turbines is advantageous in various applications. Sometimes reasonable part-load performance is sufficient, while in other cases complete agreement with the performance of an existing machine is desirable. This paper is aimed at providing some guidance on methodologies for predicting part-load performance of aero-derivative gas turbines. Two different design models – one simple and one more complex – are created. Subsequently, for each of these models, the part-load performance is predicted using component maps and turbine constants, respectively. Comparisons with manufacturer data are made. With respect to the design models, the simple model, featuring a compressor, combustor and turbines, results in equally good performance prediction in terms of thermal efficiency and exhaust temperature as does a more complex model. As for part-load predictions, the results suggest that the mass flow and pressure ratio characteristics can be well predicted with both methods. The thermal efficiency and exhaust temperature, however, are not well predicted below 60–70% load when using turbine constants and assuming constant efficiencies for turbomachinery.

Suggested Citation

  • Haglind, F. & Elmegaard, B., 2009. "Methodologies for predicting the part-load performance of aero-derivative gas turbines," Energy, Elsevier, vol. 34(10), pages 1484-1492.
    • Handle: RePEc:eee:energy:v:34:y:2009:i:10:p:1484-1492
    DOI: 10.1016/j.energy.2009.06.042
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    Cited by:

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    16. Haglind, F., 2010. "Variable geometry gas turbines for improving the part-load performance of marine combined cycles – Gas turbine performance," Energy, Elsevier, vol. 35(2), pages 562-570.
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    21. Benato, A. & Kærn, M.R. & Pierobon, L. & Stoppato, A. & Haglind, F., 2015. "Analysis of hot spots in boilers of organic Rankine cycle units during transient operation," Applied Energy, Elsevier, vol. 151(C), pages 119-131.
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