Effects of combustion efficiency on an Otto cycle
Author: Ozsoysal, Osman Azmi
Source: International Journal of Exergy, Volume 7, Number 2, 26 January 2010 , pp. 232-242(11)
Publisher: Inderscience Publishers
Abstract:This paper explains how the combustion efficiency influence the performance of an irreversible Otto cycle under conditions of varying fuel‐air ratio. The irreversibility of Otto cycle comes exclusively from the expansion and compression processes. It is assumed that some fraction of the fuel's chemical energy cannot be fully released inside the engine because of incomplete combustion. Amount of the released energy from fuel into the cylinder restricts the compression ratio. Thermal efficiency‐work curves cannot have a closed loop shape because of the relationships between the fuel energy, air‐fuel mass ratio, combustion efficiency, maximum temperature and heat losses.
Document Type: Research Article
Affiliations: Naval Architecture and Marine Engineering Department, Istanbul Technical University, Ayazaga Campus, TR-34469, Istanbul, Turkey
Publication date: 2010-01-26
- The International Journal of Exergy is a quarterly publication dedicated to providing an interdisciplinary platform for information and ideas in the field of exergy and thermodynamic optimisation. It publishes a wide range of original, high-quality research papers, and ancillary features, spanning activities from fundamental research to industrial applications. The International Journal of Exergy covers aspects of exergy analysis of engineering and non-engineering systems and processes in a large variety of disciplines, ranging from mechanical engineering to physics and chemical engineering to industrial ecology.
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