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An analysis of the efficiency and economy of humidified gas turbines in district heating applications
KTH, Superseded Departments, Chemical Engineering and Technology.
KTH, Superseded Departments, Chemical Engineering and Technology.
KTH, Superseded Departments, Chemical Engineering and Technology.
2004 (English)In: Energy, ISSN 0360-5442, Vol. 29, no 15-dec, 1945-1961 p.Article in journal (Refereed) Published
Abstract [en]

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)(1) 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 kW(el) and 60% per kW(DH)) 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 Euro5-8/MWh(el) lower than the conventional alternatives in district heating applications.

Place, publisher, year, edition, pages
2004. Vol. 29, no 15-dec, 1945-1961 p.
National Category
Chemical Engineering
URN: urn:nbn:se:kth:diva-23845DOI: 10.1016/ 000224762400009ScopusID: 2-s2.0-10044242496OAI: diva2:342544
QC 20100525 QC 20110922. 15th International Conference on Efficiency, Costs, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS 2002). Berlin, GERMANY. JUL 03-05, 2002 Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2011-10-17Bibliographically approved

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Rydstrand, MagnusWestermark, Mats O.Bartlett, Michael
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