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RESEARCH PAPERS

The Application of Availability and Energy Balances to a Diesel Engine

[+] Author and Article Information
A. C. Alkidas

Engine Research Department, General Motors Research Laboratories, Warren, MI 48090

J. Eng. Gas Turbines Power 110(3), 462-469 (Jul 01, 1988) (8 pages) doi:10.1115/1.3240143 History: Received April 01, 1987; Online October 15, 2009

Abstract

The maximum power that can be extracted from an engine operating at a given condition was determined by means of analyses based on the first and second laws of thermodynamics. These analyses were applied to a heavy-duty single-cylinder open-chamber diesel engine operated at constant speed. Over the range of operating conditions investigated, the second-law efficiency (ratio of brake power to maximum extractable power) of the engine, which increased with engine load, was found to vary from 22 to 50 percent. It was concluded that besides heat transfer, the combustion process was the most important source of irreversibility and accounted for 25 to 43 percent of the lost power.

Copyright © 1988 by ASME
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