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Performance analysis of a novel multi-function liquid desiccant regeneration system for liquid desiccant air-conditioning system

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  • Cheng, Qing
  • Xu, Wenhao

Abstract

The liquid desiccant air-conditioning system (LDAS) is a novel air-conditioner with good energy saving potential. Regenerator is the key component of the liquid desiccant air-conditioning system, which is the main energy-consumed part. Electrodialysis regenerator is a new liquid desiccant regeneration method which can meet the dehumidification requirements even when the environment air is hot and wet. In this paper, in order to reduce the waste of electrode solution and the operational cost of normal electrodialysis regenerator, a novel multi-function liquid desiccant regeneration system was developed and investigated. Moreover, an experimental system was constructed to achieve the accurate current efficiency of the new system. The results show that in order to improve the current efficiency of the multi-function desiccant regeneration system, the operational current and the concentration difference between solutions in regenerate chambers and dilute chambers should be both decreased. The ideal performance coefficient of liquid desiccant air-conditioning system can exceed 7 when the conductivity of liquid desiccant is higher than 300 mS/cm. In the practical application of the multi-function liquid desiccant regeneration system, the operational current will be designed to fulfill the hydrogen and halogen gas production of the system.

Suggested Citation

  • Cheng, Qing & Xu, Wenhao, 2017. "Performance analysis of a novel multi-function liquid desiccant regeneration system for liquid desiccant air-conditioning system," Energy, Elsevier, vol. 140(P1), pages 240-252.
    • Handle: RePEc:eee:energy:v:140:y:2017:i:p1:p:240-252
    DOI: 10.1016/j.energy.2017.08.092
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    References listed on IDEAS

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    Cited by:

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    2. Dong, Chuanshuai & Lu, Lin & Wen, Tao, 2018. "Investigating dehumidification performance of solar-assisted liquid desiccant dehumidifiers considering different surface properties," Energy, Elsevier, vol. 164(C), pages 978-994.
    3. 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).
    4. She, Xiaohui & Cong, Lin & Nie, Binjian & Leng, Guanghui & Peng, Hao & Chen, Yi & Zhang, Xiaosong & Wen, Tao & Yang, Hongxing & Luo, Yimo, 2018. "Energy-efficient and -economic technologies for air conditioning with vapor compression refrigeration: A comprehensive review," Applied Energy, Elsevier, vol. 232(C), pages 157-186.
    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.
    6. 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).
    7. Ou, Xianhua & Cai, Wenjian & He, Xiongxiong & Zhai, Deqing, 2018. "Experimental investigations on heat and mass transfer performances of a liquid desiccant cooling and dehumidification system," Applied Energy, Elsevier, vol. 220(C), pages 164-175.
    8. Liu, Hongdou & Yang, Hongquan & Qi, Ronghui, 2020. "A review of electrically driven dehumidification technology for air-conditioning systems," Applied Energy, Elsevier, vol. 279(C).
    9. Qing Cheng & Han Wang, 2020. "Experimental Research on Regeneration Characteristic of ED Regeneration for Lithium Bromide Desiccant Solution with High Concentration: Operating Condition and Electrode Solution," Energies, MDPI, vol. 13(18), pages 1-14, September.

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