Moscato, André Luiz SalvatOliveira, Santiago del Rio [UNESP]2016-03-022016-03-022015International Review of Mechanical Engineering, v. 9, n. 1, p. 11-20, 2015.1970-8734http://hdl.handle.net/11449/135823This paper presents an analysis of an irreversible Otto cycle aiming to optimize the net power through ECOP and ecological function. The studied cycle operates between two thermal reservoirs of infinite thermal capacity, with internal irreversibilities derived from non-isentropic behavior of compression and expansion processes, irreversibilities from thermal resistance in heat exchangers and heat leakage from the high temperature reservoir to the low temperature reservoir. Analytical expressions are applied for the power outputs optimized by the ECOP, by the ecological function and by the maximum power criteria, in conjunction with a graphic analysis, in which some cycle operation parameters are analyzed for an increased comprehension of the effects of the irreversibilities in the optimized power.11-20engOttoECOPEcological functionOptimizationArtigo0.15866/ireme.v9i1.5045Acesso restrito6469406277752689