An analysis of the efficiency and economy of humidified gas turbines in district heating applications
2004 (English)In: Energy, ISSN 0360-5442, Vol. 29, no 15-dec, 1945-1961 p.Article in journal (Refereed) Published
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.
IdentifiersURN: urn:nbn:se:kth:diva-23845DOI: 10.1016/j.energy.2004.03.023ISI: 000224762400009ScopusID: 2-s2.0-10044242496OAI: oai:DiVA.org:kth-23845DiVA: 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 2010-08-102010-08-102011-10-17Bibliographically approved