Efficiency Enhancement of a Pipeline Turbocompressor With a Gas/Steam Combined Cycle PUBLIC ACCESS

[+] Author Affiliations
Vittorio Cocchi, Vasco Mezzedimi

Nuovo Pignone, Florence, Italy

Marco Pucci

Turbotecnica, Florence, Italy

Giuliano Vitali

SNAM, Milan, Italy

Paper No. 88-GT-250, pp. V003T07A005; 12 pages
  • ASME 1988 International Gas Turbine and Aeroengine Congress and Exposition
  • Volume 3: Coal, Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations
  • Amsterdam, The Netherlands, June 6–9, 1988
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7920-7
  • Copyright © 1988 by ASME


The problems typically encountered with the basic engineering of a combined-cycle installation are examined here in general; the selection criteria of the operating fluid and determination of the thermodynamic parameters of the steam cycle are also dealt with in the appendix.

The combined-cycle gas compression unit at present under construction in SNAM’s Station at Messina is then described extensively; the system, designed to comply with the specific requirements of a gas compression plant (unmanned continuous operation in severe environmental conditions), is characterized by an efficiency higher than 47% at ISO conditions.

Special attention is paid to the control system and to the analysis of the dynamic behaviour of the gas / steam unit by which two pipeline compressors (the main one driven by the gas turbine and the auxiliary one driven by the steam turbine) are made to run in parallel.

Copyright © 1988 by ASME
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