Browse > Article

Simulation of $H_2O/LiBr$ Triple Effect Absorption Systems with a Modified Reverse Flow  

Jo, Young-Kyong (Department of Mechanical Engineering, Kyung Hee University)
Kim, Jin-Kyeong (Department of Mechanical Engineering, Kyung Hee University)
Kang, Yang-Tae (School of Mechanical and Industry System Engineering, Kyung Hee University)
Publication Information
International Journal of Air-Conditioning and Refrigeration / v.15, no.3, 2007 , pp. 114-121 More about this Journal
In this study, a modified reverse flow type, one of the triple effect absorption cycles, is studied for performance improvement. The cycle simulation is carried out by using EES(Engineering Equation Solver) program for the working fluid of $H_2O/LiBr$ solution. The split-ratios of solution flow rate, UA of each component, pumping mass flow rate of solution are considered as key parameters. The results show that the optimal SRH (split ratio of high side) and SRL (split ratio of low side) values are 0.596 and 0.521, respectively. Under these conditions, the COP is maximized to 2.1. The optimal pumping mass flow rate is selected as 3 kg/s and the corresponding UAEV A is 121 kW/K in the present system. The present simulation results are compared to the other literature results from Kaita's (2002) and Cho's (1998) triple effect absorption systems. The present system has a lower solution temperature and a higher COP than the Kaita's modified reverse flow, and it also gives a higher COP than the Cho's parallel flow by adjusting split ratios.
Triple effect absorption system; Modified reverse flow; $H_2O/LiBr$; Cycle simulation; Split ratio;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Kang, Y. T., Kunugi, Y., and Kashiwagi, T., Review of advanced absorption cycles: Performance improvement and temperature lift enhancement. Int J Refrig, 2000; Vol. 23 pp.388-41   DOI   ScienceOn
2 Garimella, S., Lacy, D., and Stout, R. E., Space-conditioning using triple-effect absorption heat pumps, Appl Therm Eng, 1997, Vol. 17, pp. 1183-1197   DOI   ScienceOn
3 Yoon, J. I., Lee, Y. H., Lee, Y. H., and Oh, H. K., 1994, Performance characteristics of the $H_2O$ + LiBr triple-effect absorption cooling cycles, proceedings of SAREK, pp. 131-136
4 Kim, J. S., Ziegler, F., and Lee, H., 2002, Simulation of the compressor-assisted triple-effect $H_2O$/LiBr absorption cooling cycles, Appl Therm Eng, Vol. 22, pp.295-308   DOI   ScienceOn
5 Grossman, G., Zaltash, A., 2001, ABSIM-modular simulation of advanced absorption systems, Int J Refrig, Vol. 24, pp. 531-543   DOI   ScienceOn
6 rikhirin, P., Aphornratana, S., 2001, A review of absorption refrigeration technologies. Renew Energ, Vol. 5, pp.343-372   DOI   ScienceOn
7 Cho, K. W., Jeong, S. Y., and Jeong, E. S., 1998, Cycle simulation of a triple effect LiBr/water absorption chiller, Korean J. of Air Conditioning and Refrigeration Engineering, Vol. 10, pp, 79-87
8 Cho, K. W., Jeong, S. Y., and Jeong, E. S., 1997, Cycle simulation of a triple effect absorption chiller with a working fluid of LiBr/ Water, proceedings of the SAREK, pp.378-385
9 Kaita, Y., 2002, Simulation results of triple-effect absorption cycles, Int J. Refrig, Vol. 25, pp. 999-1007   DOI   ScienceOn
10 Kang, Y. T., Hong, H., and Park, K. S., Performance analysis of advanced hybrid GAX cycles, HGAX, Int J. Refrig, 2004, Vol. 27, pp. 442-448   DOI   ScienceOn
11 Xu, G. P., Dai, Y. Q., 1997, Theoretical analysis and optimization of a double-effect parallel-flow-type absorption chiller, Appl Therm Eng, Vol. 17, pp.157-170   DOI   ScienceOn
12 Xu, G. P., Dai, Y. Q., Tou, K. W., and Tso, C. P., 1996, Theoretical analysis and optimization of a double-effect series-flow-type absorption chiller, Appl Therm Eng, Vol. 16, pp. 975-987   DOI   ScienceOn
13 Kang, Y. T., Akisawa, A., and Kashiwagi, T., An advanced GAX cycle for waste heat recovery : WGAX cycle, Appl Therm Eng, 1999, Vol. 19, pp.933-947   DOI   ScienceOn
14 Herold, K. E., Radermacher, R., and Klein, S. A., 1996, Absorption Chillers and heat pumps, CRC Press, New York