Performance Evaluation of Selected Combustion Gas Turbine Cogeneration Systems Based on First and Second-Law Analysis

[+] Author and Article Information
F. F. Huang

Department of Mechanical Engineering, San Jose State University, San Jose, CA 95192

J. Eng. Gas Turbines Power 112(1), 117-121 (Jan 01, 1990) (5 pages) doi:10.1115/1.2906465 History: Received December 23, 1988; Online April 24, 2008


The thermodynamic performance of selected combustion gas turbine cogeneration systems has been studied based on first-law as well as second-law analysis. The effects of the pinch point used in the design of the heat recovery steam generator, and pressure of process steam on fuel-utilization efficiency (first-law efficiency), power-to-heat ratio, and second-law efficiency, are examined. Results for three systems using state-of-the-art industrial gas turbines show clearly that performance evaluation based on first-law efficiency alone is inadequate. Decision makers should find the methodology contained in this paper useful in the comparison and selection of cogeneration systems.

Copyright © 1990 by The American Society of Mechanical Engineers
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