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An analysis of the efficiency and economy of humidified gas turbines in district heating applications

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  • Rydstrand, Magnus C.
  • Westermark, Mats O.
  • Bartlett, Michael A.

Abstract

In this article, the performance of gas turbine cycles operating with air/water working fluids, so-called humidified cycles, are examined in district heating applications. The investigated cycles are based on a GTX100 core from ALSTOM Power Sweden AB (ALSTOM)11Now member of the Siemens group. and utilise a two-stage flue gas condenser and an inlet air humidifier (pre-humidifier) to provide elevated quantities of district heating. Simulations have shown that electrical efficiencies up to 50% and total efficiencies above 100% can be reached calculated on the lower heating value (LHV) of the fuel. Based on cost data from ALSTOM, humidified cycles have a potential to give much lower (40% per kWel and 60% per kWDH) specific investment costs compared to combined cycles, mainly due to the absence of steam turbine. The humidified cycles are predicted to be cost-effective investments at market electricity prices € 5–8/MWhel lower than the conventional alternatives in district heating applications.

Suggested Citation

  • Rydstrand, Magnus C. & Westermark, Mats O. & Bartlett, Michael A., 2004. "An analysis of the efficiency and economy of humidified gas turbines in district heating applications," Energy, Elsevier, vol. 29(12), pages 1945-1961.
    • Handle: RePEc:eee:energy:v:29:y:2004:i:12:p:1945-1961
    DOI: 10.1016/j.energy.2004.03.023
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    Cited by:

    1. Zhao, Hongbin & Yue, Pengxiu, 2011. "Performance analysis of humid air turbine cycle with solar energy for methanol decomposition," Energy, Elsevier, vol. 36(5), pages 2372-2380.
    2. Colmenar-Santos, Antonio & Rosales-Asensio, Enrique & Borge-Diez, David & Collado-Fernández, Eduardo, 2016. "Evaluation of the cost of using power plant reject heat in low-temperature district heating and cooling networks," Applied Energy, Elsevier, vol. 162(C), pages 892-907.
    3. Torchio, Marco F. & Genon, Giuseppe & Poggio, Alberto & Poggio, Marco, 2009. "Merging of energy and environmental analyses for district heating systems," Energy, Elsevier, vol. 34(3), pages 220-227.
    4. Ehyaei, M.A. & Mozafari, A. & Alibiglou, M.H., 2011. "Exergy, economic & environmental (3E) analysis of inlet fogging for gas turbine power plant," Energy, Elsevier, vol. 36(12), pages 6851-6861.

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