Numerical Analysis of Exergy for Air-Conditioning Influenced by Ambient Temperature


  • Jing-Nang Lee
  • Chien-Chih Chen
  • Chen-Ching Ting


exergy, ambient temperature, exergy loss, working efficiency


The article presents numerical analysis of exergy for air-conditioning influenced by ambient temperature. The model of numerical simulation uses an integrated air conditioning system exposed in varied ambient temperature to observe change of the four main devices, the compressor, the condenser, the capillary, and the evaporator in correspondence to ambient temperature. The analysis devices of the four devices’s exergy influenced by the varied ambient temperature and found that the capillary has unusual increasing exergy loss vs. increasing ambient temperature in comparison to the other devices. The result shows that reducing exergy loss of the capillary influenced by the ambient temperature is the key for improving working efficiency of an air-conditioning system when influence of the ambient temperature is considered. The higher ambient temperature causes the larger pressure drop of capillary and more exergy loss.


M. J. Gupta and P. Chandra, “Effect of greenhouse design parameters on conservation of energy for greenhouse environmental control,” Energy, vol. 27, no. 8, pp. 777-794, Aug. 2002.

F. Meunier, “The greenhouse effect: A new source of energy,” Applied Thermal Engineering, vol. 27, no. 2-3, pp. 658-664, Feb. 2007.

A. Bejan, Entropy generation through heat and fluid flow. Wiley, New York, 1982.

A. Bejan, Advanced engineering thermodynamics. Wiley, New York, 2006.

Y. A. Cengel and M. A. boles, Thermodynamics: an engineering approach. McGraw-Hill, 2006.

S. M. Zubair, M. Yaqub, and S. H. Khan, “Second-law-based thermodynamic analysis of two-stage and mechanical-subcooling refrigeration cycles,” International Journal of Refrigeration, vol. 19, no. 8, pp. 506-516, 1996.

C. Nikolaidis and D. Probert, “Exergy-method analysis of a two-stage vapour-compression refrigeration-plants performance,” Applied Energy, vol. 60, no. 4, pp. 241-256, 1998.

U. R. Jammel and S. M. Zubair, “Design and rating of an integrated mechanical-subcooling vapor- compression refrigeration system,” Energy Conversion and Management, vol. 41, no. 11, pp. 1201-1222, July 2000.

U. R. Jammel and S. M. Zubair, “Thermodynamic optimization of finite time vapor compression refrigeration systems,” Energy Convers Management, vol. 42, pp. 457-1475, 2001.

R. Yumruta, M. Kunduz, and M. Kanoglu, “Exergy analysis of vapor compression refrigeration systems,” Exergy, An International Journal, vol. 2, no. 4, pp. 266-272, 2002.

E. T. Reyes, M. P. Nunez, and J. C. de Gortari, “Exergy analysis and optimization of a solar assisted heat pump,” Energy, vol. 23, no. 4, pp. 2337-344, Apr. 1998.

J. Chen, X. Chen, and C. Wu, “Optimization of the rate of exergy output of a multistage endoreversible combined refrigeration system,” Exergy, An International Journal, vol. 1, no. 2, pp. 100-106, 2001.




How to Cite

J.-N. Lee, C.-C. Chen, and C.-C. Ting, “Numerical Analysis of Exergy for Air-Conditioning Influenced by Ambient Temperature”, Int. j. eng. technol. innov., vol. 4, no. 3, pp. 152–160, Jul. 2014.