This paper outlines the handling of a semi-closed cycle gas turbine, its working fluid is carbon dioxide and the fuel is low heating value gas from coal; however, at startup air and natural gas are used. The objective of the machine is to produce clean electricity with the smallest efficiency penalty. Many aspects of the operation of the engine are examined in this paper; these include starting requirements, stator vane and bleed valve scheduling, and the working fluid transition from air to carbon dioxide. Other features highlighted are the compressor operating lines and surge margins. The present paper describes the salient features of the three main stages into which the engine operation has been divided. These stages are: startup to synchronous idle, change of working fluid (from air to Carbon Dioxide-Argon) and fuel (from natural gas to coal synthetic gas) at synchronous idle, and part load operation. Preliminary findings show that engine handling can be carried out effectively with variable stators. This is possible because of the two-shaft gas generator. Another point of interest is the large increase of corrected speed relative to rotational speed experienced when the working fluid changes from air to carbon dioxide. In general the control of the engine does not seem to present any insurmountable problems despite the complexities arising from the need to change working fluid and fuel. [S0742-4795(00)02903-3]
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July 2000
Technical Papers
Handling of a Semiclosed Cycle Gas Turbine With a Carbon Dioxide-Argon Working Fluid
Inaki Ulizar,
Inaki Ulizar
Industria de Turbopropulsores—Ajalvir, Torrejon de Ardoz, Madrid, Spain
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Pericles Pilidis
Pericles Pilidis
School of Mechanical Engineering, Cranfield University, Cranfield, Bedford, U.K.
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Inaki Ulizar
Industria de Turbopropulsores—Ajalvir, Torrejon de Ardoz, Madrid, Spain
Pericles Pilidis
School of Mechanical Engineering, Cranfield University, Cranfield, Bedford, U.K.
Contributed by the International Gas Turbine Institute (IGTI) of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS for publication in the ASME JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Paper presented at the International Gas Turbine and Aeroengine Congress and Exhibition, Indianapolis, IN, June 7–10, 1999; ASME Paper 99-GT-374. Manuscript received by IGTI March 9, 1999; final revision received by the ASME Headquarters May 15, 2000. Associate Technical Editor: D. Wisler.
J. Eng. Gas Turbines Power. Jul 2000, 122(3): 437-441 (5 pages)
Published Online: May 15, 2000
Article history
Received:
March 9, 1999
Revised:
May 15, 2000
Citation
Ulizar, I., and Pilidis, P. (May 15, 2000). "Handling of a Semiclosed Cycle Gas Turbine With a Carbon Dioxide-Argon Working Fluid ." ASME. J. Eng. Gas Turbines Power. July 2000; 122(3): 437–441. https://doi.org/10.1115/1.1287497
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