Effects of variable specific heat ratio of working fluid on performance of endoreversible Diesel cycle

The performance of a Diesel cycle with heat transfer loss and variable specific heat ratio of working fluid is analysed. Using finite time thermodynamics, the characteristic curves of the work output v. compression ratio, the thermal efficiency v. compression ratio and the work output v. thermal efficiency are obtained. Moreover, the effects of variable specific heat ratio of working fluid on the cycle performance are significant. The results obtained in this work can help to understand how the cycle performance is influenced by the variation specific heat ratio, and they should be considered in practical cycle analysis.

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

[2]  S. Sieniutycz,et al.  Thermodynamic Optimization of Finite-Time Processes , 2000 .

[3]  M. A. Ceviz,et al.  Temperature and air–fuel ratio dependent specific heat ratio functions for lean burned and unburned mixture , 2005 .

[4]  Souvik Bhattacharyya,et al.  Optimizing an irreversible Diesel cycle — fine tuning of compression ratio and cut-off ratio , 2000 .

[5]  F. Sun,et al.  Unified thermodynamic description and optimization for a class of irreversible reciprocating heat engine cycles , 2008 .

[6]  Fengrui Sun,et al.  The effects of variable specific heats of working fluid on the performance of an irreversible Otto cycle , 2005 .

[7]  Lingen Chen,et al.  Reciprocating heat-engine cycles , 2005 .

[8]  A. Bejan.  Entropy generation minimization: The new thermodynamics of finite-size devices and finite-time processes , 1996 .

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

[10]  Bahri Sahin,et al.  Optimization of thermal systems based on finite-time thermodynamics and thermoeconomics , 2004 .

[11]  Lingen Chen,et al.  Heat-transfer effects on net work and/or power as functions of efficiency for air-standard diesel cycles , 1996 .

[12]  A. Al-Sarkhi,et al.  Effects of friction and temperature-dependent specific-heat of the working fluid on the performance of a Diesel-engine , 2006 .

[13]  R. Stephen Berry,et al.  Power and efficiency limits for internal combustion engines via methods of finite‐time thermodynamics , 1993 .

[14]  Marcus Klein,et al.  A specific heat ratio model and compression ratio estimation , 2004 .

[15]  Bjarne Andresen,et al.  Thermodynamics for Processes in Finite Time , 1984 .

[16]  Yehuda B. Band,et al.  Optimization of a model internal combustion engine , 1982 .

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

[18]  Yingru Zhao,et al.  Performance analysis and parametric optimum criteria of an irreversible Atkinson heat-engine , 2006 .

[19]  Fengrui Sun,et al.  The universal power and efficiency characteristics for irreversible reciprocating heat engine cycles , 2003 .

[20]  L. Chen,et al.  Finite-time thermodynamic modelling and analysis of an irreversible diesel cycle , 2008 .

[21]  Fengrui Sun,et al.  Effects of heat transfer, friction and variable specific heats of working fluid on performance of an irreversible dual cycle , 2006 .

[22]  Pai-Yi Wang,et al.  Performance analysis and comparison of an Atkinson cycle coupled to variable temperature heat reservoirs under maximum power and maximum power density conditions , 2005 .

[23]  D. A. Blank,et al.  The effect of combustion on a power optimized endoreversible diesel cycle , 1993 .