Effect of Heat Transfer Law on the Ecological Optimization of a Generalized Irreversible Carnot Engine

The optimal ecological performance of a irreversible Carnot engine with the losses of heat-resistance, heat leak and internal irreversibility, in which the transfer between the working fluid and the heat reservoirs obeys a generalized heat transfer law Q ∝ δ(Tn), is derived by taking an ecological optimization criterion as the objective, which consists of maximizing a function representing the best compromise between the power and entropy production rate of the heat engine. Some special examples are discusses. A numerical example is given to show the effects of heat transfer law, heat leakage and internal irreversibility on the optimal performance of the generalized irreversible heat engine. The results can provide some theoretical guidance for the designs of practical engine.

[1]  A. Bejan.  Theory of heat transfer-irreversible power plants , 1988 .

[2]  Fengrui Sun,et al.  Ecological optimization for generalized irreversible Carnot engines , 2004 .

[3]  Itamar Procaccia,et al.  On the efficiency of rate processes. Power and efficiency of heat engines , 1978 .

[4]  Lingen Chen,et al.  Finite Time Thermodynamic Optimization or Entropy Generation Minimization of Energy Systems , 1999 .

[5]  Fernando Angulo-Brown,et al.  A general property of endoreversible thermal engines , 1997 .

[6]  A. D. Vos,et al.  Efficiency of some heat engines at maximum-power conditions , 1985 .

[7]  Fernando Angulo-Brown,et al.  An ecological optimization criterion for finite‐time heat engines , 1991 .

[8]  Chih Wu,et al.  Finite-time thermodynamic analysis of a Carnot engine with internal irreversibility , 1992 .

[9]  L. Chen,et al.  A generalised model of a real heat engine and its performance , 1996 .

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

[11]  Cha'o-Kuang Chen,et al.  The ecological optimization of an irreversible Carnot heat engine , 1997 .

[12]  Zijun Yan.  COMMENT: Comment on A general property of non-endoreversible thermal cycles , 2000 .

[13]  A. D. Vos.  Reflections on the power delivered by endoreversible engines , 1987 .

[14]  Fengrui Sun,et al.  Influence of heat transfer law on the performance of a Carnot engine , 1997 .

[15]  Fengrui Sun,et al.  Effect of heat transfer law on the performance of a generalized irreversible Carnot engine , 1999 .

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

[17]  Zijun Yan,et al.  Comment on ‘‘An ecological optimization criterion for finite‐time heat engines’’ [J. Appl. Phys. 69, 7465 (1991)] , 1993 .

[18]  Fengrui Sun,et al.  Influence of internal heat leak on the power versus efficiency characteristics of heat engines , 1997 .

[19]  Sergio Sibilio,et al.  Recent Advances in Finite-Time Thermodynamics , 1999 .

[20]  Shu Yao.  The Optimal Performance of an Irreversible Stirling Heat Pump , 2001 .

[21]  Fernando Angulo-Brown,et al.  A general property of non-endoreversible thermal cycles , 1999 .

[22]  Cha'o-Kuang Chen,et al.  Ecological optimization of an endoreversible Brayton cycle , 1998 .

[23]  Fengrui Sun,et al.  Effect of the heat transfer law on the finite-time, exergoeconomic performance of heat engines , 1996 .

[24]  J. M. Gordon,et al.  Observations on efficiency of heat engines operating at maximum power , 1990 .