International Journal of Air-Conditioning and Refrigeration

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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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)
  • Published : 2007.09.30
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Abstract

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.

Keywords

References

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