Effects of Steam Injection on the Performance of Gas Turbine Power Cycles

[+] Author and Article Information
W. E. Fraize

Fossil Energy Systems Engineering Department, METREK Division, The MITRE Corporation, McLean, Va.

C. Kinney

Division of Fossil Fuels Utilization, U. S. Department of Energy, Washington, D.C.

J. Eng. Power 101(2), 217-227 (Apr 01, 1979) (11 pages) doi:10.1115/1.3446472 History: Received November 28, 1977; Online July 14, 2010


The effect of injecting steam generated by exhaust gas waste heat into a gas turbine with 3060°R turbine inlet temperature has been analyzed. Two alternate steam injection cycles are compared with a combined cycle using a conventional steam bottoming cycle. A range of compression ratios (8, 12, 16, and 20) and water mass injection ratios (0 to 0.4) were analyzed to determine effect on net turbine power output per pound of air and cycle thermodynamic efficiency. A water/fuel cost tradeoff analysis is also provided. The results indicate promising performance and economic advantages of steam injected cycles relative to more conventional utility power cycles. Application to coal-fired configuration is briefly discussed.

Copyright © 1979 by ASME
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