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Performance evaluation of the electrodialysis regenerator for the lithium bromide solution with high concentration in the liquid desiccant air-conditioning system

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  • Pei, Wang
  • Cheng, Qing
  • Jiao, Shun
  • Liu, Lin

Abstract

In this paper, an electrodialysis regeneration experimental system was set up to evaluate the performance of electrodialysis regeneration system using lithium bromide solution, whose concentration is much higher than that of LiCl solution. The effects of cycling flow rate, initial concentration, and operating current on the current efficiency of the electrodialysis regeneration system using LiBr solution were studied. The current efficiency model and regeneration result model of the electrodialysis regenerator for LiBr solution were acquired based on experimental results. The results show that the ED regenerator can regenerate the LiBr solution reliably, and the current efficiency of the ED regenerator using LiBr solution is lower than that for LiCl solution. To enhance the capability of electrodialysis regenerator, the difference in cycling flow rates between dilute and concentrate chambers should be controlled. The current efficiency of the electrodialysis regenerator and COP of electrodialysis regeneration system decreased with the increase of the operating current and initial concentration. When the concentration of LiBr solution is 45% and the operating current is 3A, the electrodialysis regeneration system has the maximum current efficiency of about 30.365% and the maximum COP of 4.26.

Suggested Citation

  • Pei, Wang & Cheng, Qing & Jiao, Shun & Liu, Lin, 2019. "Performance evaluation of the electrodialysis regenerator for the lithium bromide solution with high concentration in the liquid desiccant air-conditioning system," Energy, Elsevier, vol. 187(C).
    • Handle: RePEc:eee:energy:v:187:y:2019:i:c:s0360544219316123
    DOI: 10.1016/j.energy.2019.115928
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    References listed on IDEAS

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    Cited by:

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    2. Liu, Lin & Cheng, Qing, 2020. "Mass transfer characteristic research on electrodialysis for desalination and regeneration of solution: A comprehensive review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 134(C).
    3. Cheng, Qing & Wang, Han & Liu, Lin, 2022. "An ion mass transfer model of electrodialysis regenerator for inorganic salt liquid desiccants," Energy, Elsevier, vol. 239(PE).
    4. Pasqualin, P. & Lefers, R. & Mahmoud, S. & Davies, P.A., 2022. "Comparative review of membrane-based desalination technologies for energy-efficient regeneration in liquid desiccant air conditioning of greenhouses," Renewable and Sustainable Energy Reviews, Elsevier, vol. 154(C).
    5. Qing Cheng & Han Wang & Lin Zhu & Yao Chen, 2023. "A current efficiency model coupled with desiccant molecular weight for electrodialysis regeneration in liquid desiccant air-conditioning systems," Energy & Environment, , vol. 34(4), pages 909-926, June.

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