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

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

Energy, 2004, vol. 29, issue 12, 1945-1961

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.

Date: 2004
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Citations: View citations in EconPapers (4)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:29:y:2004:i:12:p:1945-1961

DOI: 10.1016/j.energy.2004.03.023

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