High fogging is a power augmentation device where water is sprayed upstream of the compressor inlet with higher mass flow than that which would be needed to saturate the intake air. The main focus of this paper is on applications of high fogging on the ALSTOM gas turbine engines of the family GT24/GT26. Engine operation and performance are illustrated based on test results obtained from four different engines that have meanwhile accumulated more than 12,000 operating hours (OH) in commercial operation with ALSTOM’s ALFog® high fogging system. The effect of internal cooling (water evaporation inside the compressor) is investigated considering actual compressor boundaries matched within the complete engine. Changes in the secondary air system (SAS) and corresponding movement of the engine operating line have been taken into account. Power output gain as high as 7.1% was experimentally demonstrated for injected water mass fraction equal to 1% and considering internal cooling effects only. Higher figures can be obtained for operation at low ambient relative humidity and partial evaporation upstream of the compressor inlet.
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e-mail: giovanni.cataldi@power.alstom.com
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January 2006
Technical Papers
Influence of High Fogging Systems on Gas Turbine Engine Operation and Performance
Giovanni Cataldi,
e-mail: giovanni.cataldi@power.alstom.com
Giovanni Cataldi
ALSTOM (Switzerland) Ltd.
, Brown Boveri Strasse 7, CH-5401 Baden, Switzerland
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Harald Güntner,
Harald Güntner
ALSTOM (Switzerland) Ltd.
, Brown Boveri Strasse 7, CH-5401 Baden, Switzerland
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Charles Matz,
Charles Matz
ALSTOM (Switzerland) Ltd.
, Brown Boveri Strasse 7, CH-5401 Baden, Switzerland
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Tom McKay,
Tom McKay
ALSTOM (Switzerland) Ltd.
, Brown Boveri Strasse 7, CH-5401 Baden, Switzerland
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Jürgen Hoffmann,
Jürgen Hoffmann
ALSTOM (Switzerland) Ltd.
, Brown Boveri Strasse 7, CH-5401 Baden, Switzerland
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Anton Nemet,
Anton Nemet
ALSTOM (Switzerland) Ltd.
, Brown Boveri Strasse 7, CH-5401 Baden, Switzerland
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Stefan Lecheler,
Stefan Lecheler
Universität der Bundeswehr München
, Werner-Heisenberg-Weg 39, D-85577 Neubiberg, Germany
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Jost Braun
Jost Braun
Kempten University of Applied Sciences
, Bahnhofstrasse 61-63, D-87435 Kempten, Germany
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Giovanni Cataldi
ALSTOM (Switzerland) Ltd.
, Brown Boveri Strasse 7, CH-5401 Baden, Switzerlande-mail: giovanni.cataldi@power.alstom.com
Harald Güntner
ALSTOM (Switzerland) Ltd.
, Brown Boveri Strasse 7, CH-5401 Baden, Switzerland
Charles Matz
ALSTOM (Switzerland) Ltd.
, Brown Boveri Strasse 7, CH-5401 Baden, Switzerland
Tom McKay
ALSTOM (Switzerland) Ltd.
, Brown Boveri Strasse 7, CH-5401 Baden, Switzerland
Jürgen Hoffmann
ALSTOM (Switzerland) Ltd.
, Brown Boveri Strasse 7, CH-5401 Baden, Switzerland
Anton Nemet
ALSTOM (Switzerland) Ltd.
, Brown Boveri Strasse 7, CH-5401 Baden, Switzerland
Stefan Lecheler
Universität der Bundeswehr München
, Werner-Heisenberg-Weg 39, D-85577 Neubiberg, Germany
Jost Braun
Kempten University of Applied Sciences
, Bahnhofstrasse 61-63, D-87435 Kempten, GermanyJ. Eng. Gas Turbines Power. Jan 2006, 128(1): 135-143 (9 pages)
Published Online: March 1, 2004
Article history
Received:
October 1, 2003
Revised:
March 1, 2004
Citation
Cataldi, G., Güntner, H., Matz, C., McKay, T., Hoffmann, J., Nemet, A., Lecheler, S., and Braun, J. (March 1, 2004). "Influence of High Fogging Systems on Gas Turbine Engine Operation and Performance." ASME. J. Eng. Gas Turbines Power. January 2006; 128(1): 135–143. https://doi.org/10.1115/1.1926313
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