Skip to main content Accessibility help

Exergetic Efficiency Optimization for an Irreversible Carnot Heat Engine

  • T.-B. Chang (a1)


In this paper, an exergetic efficiency optimization method that combines the concept of exergy and finite-time thermodynamic theory is developed to analyze an irreversible heat engine. With the total thermal conductance constraint, the analytical solutions of optimal allocation of thermal conductance and the corresponding maximum exergetic efficiency, thermal efficiency, as well as operating temperatures of hot and cold sides are obtained under a fixed overall heat supply rate. The results show that the exergetic efficiency optimization method can effectively analyze an irreversible heat engine.


Corresponding author

*Associate Professor


Hide All
1.Curzon, F. L. and Ahlborn, B., “Efficiency of a Carnot Engine at Mavimum Power Output,” Amer. J. Phys, 43(1), pp. 2224 (1975).
2.De Vos, A., “Efficiency of Some Heat Engines at Maximum-Power Conditions,” Amer. J. Phys, 53, pp. 570573 (1985).
3.Beian, A., “Theory of Heat Transfer-Irreversible Refrigeration Plants,” Int. J. Heat Mass Transfer, 32, pp. 16311639(1989).
4.Bejan, A., Tsatsaronis, G. and Moran, M., Thermal Design & Optimization, John Wiley & Sons, pp. 319320 (1996).
5.Bejan, A., Advanced Engineering Thermodynamics, 2rd Edition., Wiley, New York, pp. 376378 (1997).
6.Wu, C., Chen, L. and Sun, F., “Optimization of Steady Flow Refrigeration Cycles,” Int. J. Ambient Energy, 17, pp. 199206 (1996).
7.Bejan, A., Entropy Generation Through Heat and Fluid Flow, John Wiley & Sons (1982).
8.Beian, A., “Theory of Heat Transfer-Irreversible Power Plants,” Int. J. Heat Mass Transfer, 31(6), pp. 12111219 (1988).
9.Chen, J., “The Maximum Power Output and maximum Efficiency of an Irreversible Carnot Heat Engine,” J. Pys. D: Appl. Phys., 27, pp. 11441149(1994).
10.Chen, L., Sun, F., Wu, C. and Kiang, R. L., “A Generalized Model of a Real Refrigerator and Its Performance,” Applied Thermal Engineering, 17(4), pp. 401412 (1997).
11.Cheng, C. Y. and Chen, C. K., “Power Optimization of an Irreversible Brayton Heat Engine,” Energy Source, 19, pp. 461474 (1997).
12.Cheng, C. Y. and Chen, C. K., “Efficiency Optimizations of an Irreversible Brayton Heat Engine,” Trans. ASME J. Energy Resour. Technol., 120, pp. 143148 (1998).
13.Salah El-Din, M. M., “Optimization of Totally irreversible refrigerators and Heat Pumps,” Energy Conversion & Management, 40, pp. 423436 (1999).
14.Chen, L., Sun, F. and Wu, C., “Maximum Profit Performance for Generalized Irreversible Carnot Engines,” Appl. Energy, 79(1), pp. 1525 (2004).
15.Hsieh, Y. C. and Chiou, J. S., “Optimal Allocation of Heat Transfer Area for a Heat Engine,” Journal of Mechanics, 21, pp. 14(2005).



Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed