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Steady-state and transient compressor surge behavior within a SOFC-GT-hybrid system

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Author

Summary, in English

Future pressurized Solid Oxide Fuel Cell- (SOFC) Gas Turbine Hybrid Systems (HS) promise high efficiency at both full-and part-load on account of the upper and lower SOFC temperature limit and the compressor surge line [1]. The compressor surge constraint is also evident in transient HS operation, caused by the slow transients of SOFC temperature imposed by large SOFC plenum, and fast turbo-machinery transients. This paper presents steady-state and unsteady-state HS modeling and calculation results with regard to surge. The transient compressor and SOFC models have been validated against literature. Calculation results of the coupled SOFC-GT-HS reveal a small operational window in case of unmatched turbine and the critical transient characteristics for HS shut-down.

Publishing year

2004

Language

English

Pages

541-550

Publication/Series

Proceedings of the ASME Turbo Expo 2004

Volume

7

Document type

Conference paper

Publisher

American Society Of Mechanical Engineers (ASME)

Topic

  • Energy Engineering

Keywords

  • Blade cracking
  • Gas turbine hybrid systems (HS)
  • Compressor surge line
  • Part-load modeling

Conference name

2004 ASME Turbo Expo

Conference date

2004-06-14 - 2004-06-17

Conference place

Vienna, Austria

Status

Published