Title: Determination of optimum speed of an internal combustion engine by exergy analysis

Authors: Mehmet Kopac, Lutfi Kokturk

Addresses: Mechanical Engineering Department, Zonguldak Karaelmas University, Zonguldak 67100, Turkey. ' Mechanical Engineering Department, Zonguldak Karaelmas University, Zonguldak, Turkey

Abstract: In this study, energy and exergy analysis are applied to the experimental data of an internal combustion engine operating on the conventional Otto cycle. The data are collected using an engine test unit which enables accurate measurements of fuel flow rate, combustion air flow rate, engine load, engine speed and all the relevant temperatures. Energy and exergy efficiencies are calculated for different engine speeds and compared. Results indicate that energy efficiency is maximum at a speed of 2040 rpm whereas exergy efficiency is maximum at a speed of 2580 rpm.

Keywords: exergy analysis; exergy efficiency; internal combustion engine; optimum speed; energy analysis; Otto cycle; fuel flow rate; combustion air flow rate; engine load; engine speed; engine temperature.

DOI: 10.1504/IJEX.2005.006432

International Journal of Exergy, 2005 Vol.2 No.1, pp.40 - 54

Published online: 08 Mar 2005 *

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