Gas Turbine Compressor Interstage Cooling Using Methanol

[+] Author and Article Information
J. A. C. Fortin, M. F. Bardon

Department of Mechanical Engineering, Royal Military College of Canada, Kingston, Ontario, Canada K7L 2W3

J. Eng. Power 105(4), 859-864 (Oct 01, 1983) (6 pages) doi:10.1115/1.3227493 History: Received January 11, 1983; Online September 28, 2009


An earlier study demonstrated the theoretical potential of the concept of injecting methanol into a gas turbine compressor inlet as a means of increasing cycle thermal efficiency. To attain the full potential of such a system, continuous shifting vapour/liquid equilibrium is required which would pose formidable difficulties in practice due to the presence of liquid in the compressor blading. This study evaluates a more practicable configuration in which the alcohol is injected between stages of a multistage machine so that, due to the higher air temperatures, evaporation is complete before the mixture enters subsequent stages. Through a computer analysis, it is shown that this arrangement would retain most of the potential of the concept while greatly reducing the design and operating problems.

Copyright © 1983 by ASME
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