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Performance investigation on the ultrasonic atomization liquid desiccant regeneration system

Author

Listed:
  • Yang, Zili
  • Zhang, Kaisheng
  • Hwang, Yunho
  • Lian, Zhiwei

Abstract

Liquid desiccant dehumidification systems have accumulated considerable research interest in recent years for their great energy saving potential in buildings. Within the system, the regenerator recovering liquid desiccant plays a major role in its performance. When the ultrasonic atomization technology is applied to atomize the desiccant solution into numerous tiny droplets with diameters around 50μm, the regeneration process could be greatly enhanced. To validate this approach, a novel ultrasonic atomization liquid desiccant regeneration system (UARS) was studied in this work. An Ideal Regeneration Model (IRM) was developed to predict the regeneration performance of the UARS. Additionally, thorough experiments were carried out to validate the model under different operating conditions of the desiccant solution and air stream. The model predicted values and the experimental results coincided, with the average deviation less than 7.9%. The performance of UARS was compared with other regeneration systems from the open literature, while a case study was conducted for the power consumption and energy saving potential of UARS. It was found that the ultrasonic atomization technology enabled utilization of lower-grade energy for desiccant regeneration with the regeneration temperature lowered as much as 4.4°C. In addition, a considerable energy saving potential of up to 23.4% could be achieved by the UARS for regenerating per unit mass flow of desiccant solution, while the power consumption of the ultrasonic atomization system was less than 7.0% of total energy cost. Moreover, when the UARS is integrated with the ultrasonic atomization assisted dehumidifier, energy savings can reach up to 60.4% as compared with the packed-bed system. This study validated the feasibility and energy saving potential of applying ultrasonic atomization technology to liquid desiccant regeneration systems.

Suggested Citation

  • Yang, Zili & Zhang, Kaisheng & Hwang, Yunho & Lian, Zhiwei, 2016. "Performance investigation on the ultrasonic atomization liquid desiccant regeneration system," Applied Energy, Elsevier, vol. 171(C), pages 12-25.
    • Handle: RePEc:eee:appene:v:171:y:2016:i:c:p:12-25
    DOI: 10.1016/j.apenergy.2016.03.008
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    4. Su, Wei & Lu, Zhifei & She, Xiaohui & Zhou, Junming & Wang, Feng & Sun, Bo & Zhang, Xiaosong, 2022. "Liquid desiccant regeneration for advanced air conditioning: A comprehensive review on desiccant materials, regenerators, systems and improvement technologies," Applied Energy, Elsevier, vol. 308(C).
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    6. Chen, Q. & Kum Ja, M. & Li, Y. & Chua, K.J., 2018. "Thermodynamic optimization of a vacuum multi-effect membrane distillation system for liquid desiccant regeneration," Applied Energy, Elsevier, vol. 230(C), pages 960-973.
    7. Li, Xian & Liu, Shuai & Tan, Kok Kiong & Wang, Qing-Guo & Cai, Wen-Jian & Xie, Lihua, 2016. "Dynamic modeling of a liquid desiccant dehumidifier," Applied Energy, Elsevier, vol. 180(C), pages 435-445.
    8. 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).
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    12. Yon, Hao Ren & Cai, Wenjian & Wang, Youyi & Shen, Suping, 2018. "Performance investigation on a novel liquid desiccant regeneration system operating in vacuum condition," Applied Energy, Elsevier, vol. 211(C), pages 249-258.
    13. Peng, Donggen & Luo, Danting, 2017. "Modeling and parametrical analysis on internally-heated liquid desiccant regenerator in liquid desiccant air conditioning," Energy, Elsevier, vol. 141(C), pages 461-471.
    14. 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).
    15. Sabareesh, V. & Milan, K. John & Muraleedharan, C. & Rohinikumar, B., 2021. "Improved solar drying performance by ultrasonic desiccant dehumidification in indirect forced convection solar drying of ginger with phase change material," Renewable Energy, Elsevier, vol. 169(C), pages 1280-1293.

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