Optimal design of an Otto cycle based on thermal criteria

¹ Department of Renewable Energies, Faculty of New Science and Technologies, University of Tehran, Tehran, Iran
² Department of Petroleum Engineering, Ahwaz Faculty of Petroleum Engineering, Petroleum University of Technology (PUT), Ahwaz, Iran
³ Laboratoire d’Energétique et de Mécanique Théorique et Appliquée, ENSEM, 2 avenue de la Forêt de Haye 60604, 54518 Vandoeuvre, France
⁴ Faculty of Engineering and Applied Science, University of Ontario Institute of Technology, 2000 Simcoe Street North, Oshawa, Ontario, L1H 7K4, Canada

^a Corresponding author: mehrpoya@ut.ac.ir

Received: 23 December 2014
Accepted: 19 June 2015

Abstract

In recent years, numerous analyses have been performed on Otto cycles and Otto engines, but these have often yielded different output powers and engine thermal efficiencies. In the present study, output power and engine thermal efficiency are optimized and entropy generation is minimized using a NSGA algorithm and thermodynamic analysis. The Pareto optimal frontier is obtained and a final optimal solution is selected using various decision-making approaches, including fuzzy Bellman-Zadeh, LINMAP and TOPSIS methods. The results enhance understanding of the performances of Otto cycles and of their optimization.