Title: Decomposition method as a new type of second law analysis of the combustion process of internal combustion engines

Authors: Neven Ninić; Mirko Grljušić; Maro Jelić

Addresses: Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, Department of Mechanical Engineering and Naval Architecture, University of Split, R. Boškovića b.b., 21000 Split, Croatia. ' Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, Department of Mechanical Engineering and Naval Architecture, University of Split, R. Boškovića b.b., 21000 Split, Croatia. ' Marine Department, University of Dubrovnik, Cira Carica 4, 20000 Dubrovnik, Croatia

Abstract: The method presented in this paper gives not only the availability loss in each elementary step of the whole process in the engine, but also an insight into how big is the part of burnt fuel available during an elementary piston motion, something which cannot even theoretically be realised as pΔV work. This method is based on decomposition of a complex real process to so-called elementary processes equivalent to the real one. Practical applications of the decomposition method favour antecedence plotting of special u-s diagrams for combustion products.

Keywords: internal combustion engines; second law analysis; availability loss; u-s diagram; decomposition method; thermodynamics; combustion process; burnt fuel; piston motion.

DOI: 10.1504/IJEX.2012.045058

International Journal of Exergy, 2012 Vol.10 No.1, pp.1 - 20

Received: 14 Jan 2011
Accepted: 05 Jun 2011
Published online: 24 Jan 2012 *

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