The Rational Efficiency of Power Plants and Their Components

[+] Author and Article Information
J. H. Horlock

Whittle Laboratory, Cambridge, United Kingdom

J. Eng. Gas Turbines Power 114(4), 603-611 (Oct 01, 1992) (9 pages) doi:10.1115/1.2906633 History: Received March 01, 1991; Online April 24, 2008


The use of a rational efficiency for a power plant (the work output divided by the maximum possible reversible work output) is well established for conventional and combined plants. However, there are in the literature several proposals for “second-law” efficiencies of power plant components and no universally agreed practice. The paper discusses these various proposals and recommends particular definitions for the efficiency of components. These definitions are consistent with the universally agreed definition for overall plant rational efficiency. The approach is illustrated by a numerical example.

Copyright © 1992 by The American Society of Mechanical Engineers
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