The numerical thermodynamic analysis of Otto-Miller Cycle (OMC)

This paper presents a thermodynamic analysis for an irreversible Otto-Miller Cycle (OMC) by taking into consideration heat transfer effects and internal irreversibilities resulting from compression and expansion processes. In the analyses, the influences of the miller cycle ratio, combustion and heat loss constants and inlet temperature have been investigated relations with efficiency in dimensionless form. The dimensionless power output and power density and thermal efficiency relations have been computationally obtained versus the engine design parameters with respect to combustion and heat transfer constants. The results demonstrate that the heat transfer and combustion constants have considerable effects on the cycle thermodynamic performance. This situation theoretically verified for OMC.

[1]  Lingen Chen,et al.  Heat transfer effects on the net work output and efficiency characteristics for an air-standard Otto cycle , 1998 .

[2]  Tie Li,et al.  The Miller cycle effects on improvement of fuel economy in a highly boosted, high compression ratio, direct-injection gasoline engine: EIVC vs. LIVC , 2014 .

[3]  Karl Heinz Hoffmann,et al.  Optimal paths for thermodynamic systems: The ideal diesel cycle , 1982 .

[4]  Anthony Paul Roskilly,et al.  An analytic study of applying Miller cycle to reduce NOx emission from petrol engine , 2007 .

[5]  Lingen Chen,et al.  Thermodynamic simulation of performance of an Otto cycle with heat transfer and variable specific heats of working fluid , 2005 .

[6]  Lingen Chen,et al.  Finite-time thermodynamic modeling and analysis for an irreversible Dual cycle , 2009, Math. Comput. Model..

[7]  Osman Azmi Ozsoysal,et al.  Heat loss as a percentage of fuel’s energy in air standard Otto and Diesel cycles , 2006 .

[8]  Siqin Chang,et al.  Finite-time thermodynamic modeling and analysis of an irreversible Miller cycle working on a four-stroke engine , 2014 .

[9]  A. Al-Sarkhi,et al.  Efficiency of a Miller engine , 2006 .

[10]  Chih Wu,et al.  Performance analysis and optimization of a supercharged Miller cycle Otto engine , 2003 .

[11]  Fengrui Sun,et al.  Finite-time thermodynamic modelling and analysis of an irreversible Otto-cycle , 2008 .

[12]  Fernando Angulo-Brown,et al.  A non-endoreversible Otto cycle model: improving power output and efficiency , 1996 .

[13]  Yasin Ust,et al.  The Effects of Cycle Temperature and Cycle Pressure Ratios on the Performance of an Irreversible Otto Cycle , 2011 .

[14]  Osman Azmi Ozsoysal,et al.  A comparative performance analysis of endoreversible dual cycle under maximum ecological function and maximum power conditions , 2002 .

[15]  Sanford Klein,et al.  An Explanation for Observed Compression Ratios in Internal Combustion Engines , 1991 .

[16]  A. Kahraman,et al.  HEAT TRANSFER EFFECTS ON THE PERFORMANCE OF AN AIR STANDARD OTTO CYCLE , 2011 .

[17]  Yasin Ust,et al.  Performance maps for an air-standard irreversible Dual–Miller cycle (DMC) with late inlet valve closing (LIVC) version , 2013 .

[18]  Shuhn-Shyurng Hou,et al.  Heat transfer effects on the performance of an air standard Dual cycle , 2004 .