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RESEARCH PAPERS

Evaluation of Brayton and Rankine Alternatives for Diesel Waste Heat Exploitation

[+] Author and Article Information
J. B. Woodward

Naval Architecture & Marine Engineering, University of Michigan, Ann Arbor, MI 48109-2145

J. Eng. Gas Turbines Power 116(1), 39-45 (Jan 01, 1994) (7 pages) doi:10.1115/1.2906807 History: Received June 28, 1991; Revised February 21, 1992; Online April 24, 2008

Abstract

A diesel engine may produce exhaust-gas thermal energy in excess of that needed for turbocharging. Alternatives for exploitation of the energy by producing work may be direct expansion through a gas turbine (completing a Brayton cycle that begins with the engine’s compression and combustion), or transfer of heat into a Rankine cycle. It is demonstrated that either alternative may have a domain in which it is superior in work done, or in exhaust volume per unit mass of diesel exhaust. Computation models are developed and demonstrated for finding the boundaries along which the Rankine and Brayton alternatives have equal merit in either work or exhaust volume.

Copyright © 1994 by The American Society of Mechanical Engineers
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