Steam Cycle Regeneration Influence on Combined Gas-Steam Power Plant Performance

[+] Author and Article Information
G. Cerri, A. Colagé

Dipartimento di Meccanica e Aeronautica, Università degli Studi “La Sapienza”, Rome, Italy

J. Eng. Gas Turbines Power 107(3), 574-581 (Jul 01, 1985) (8 pages) doi:10.1115/1.3239775 History: Received November 01, 1983; Online October 15, 2009


The influence of steam cycle regeneration on combined plant performance has been analyzed from the thermodynamic point of view. A mathematical model has been developed and calculations have been performed according to a cycle analysis criterion. The higher the number of extractions the lower the relative efficiency gain. The influence of the intermediate feedwater temperatures is very small when these temperatures are slightly changed in relation to the equally spaced values. Results are given for a gas turbine firing temperature equal to 1000°C. They show a positive influence on combined cycle efficiency for small regeneration degrees. Gas turbine firing temperature in the range of 800–1400°C has been considered. The influence of the economizer inlet temperature lower limit is shown.

Copyright © 1985 by ASME
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