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A hybrid dehumidifier model for real-time performance monitoring, control and optimization in liquid desiccant dehumidification system

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  • Wang, Xinli
  • Cai, Wenjian
  • Lu, Jiangang
  • Sun, Youxian
  • Ding, Xudong

Abstract

In this paper, a simplified, yet accurate hybrid model to predict the heat and mass transfer processes in a packed column liquid desiccant dehumidifier is developed. Starting from energy and mass balance principles, and by lumping the geometric parameters and fluids’ thermodynamic coefficients as constants, the derived model only requires two equations together with total seven parameters for predicting the heat and mass transfer status in the dehumidifier. Commissioning information together with Levenberg–Marquardt method can be used to identify these parameters. Compared with the existing liquid desiccant dehumidification system dehumidifier models, the proposed model is very simple, accurate and does not require iterative computations. Experimental results demonstrate their effectiveness in predicting heat and transfer performances over a wide operating range. The model is expected to be applied in operational optimization, performance assessment, fault detection and diagnosis in liquid desiccant dehumidification system.

Suggested Citation

  • Wang, Xinli & Cai, Wenjian & Lu, Jiangang & Sun, Youxian & Ding, Xudong, 2013. "A hybrid dehumidifier model for real-time performance monitoring, control and optimization in liquid desiccant dehumidification system," Applied Energy, Elsevier, vol. 111(C), pages 449-455.
    • Handle: RePEc:eee:appene:v:111:y:2013:i:c:p:449-455
    DOI: 10.1016/j.apenergy.2013.05.026
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    5. Mohammad, Abdulrahman Th. & Mat, Sohif Bin & Sopian, K. & Al-abidi, Abduljalil A., 2016. "Review: Survey of the control strategy of liquid desiccant systems," Renewable and Sustainable Energy Reviews, Elsevier, vol. 58(C), pages 250-258.
    6. Angrisani, Giovanni & Roselli, Carlo & Sasso, Maurizio, 2015. "Experimental assessment of the energy performance of a hybrid desiccant cooling system and comparison with other air-conditioning technologies," Applied Energy, Elsevier, vol. 138(C), pages 533-545.
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    15. Rambhad, Kishor S. & Walke, Pramod V. & Tidke, D.J., 2016. "Solid desiccant dehumidification and regeneration methods—A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 59(C), pages 73-83.
    16. Cui, X. & Islam, M.R. & Mohan, B. & Chua, K.J., 2016. "Theoretical analysis of a liquid desiccant based indirect evaporative cooling system," Energy, Elsevier, vol. 95(C), pages 303-312.
    17. Juan Prieto & Antonio Atienza-Márquez & Alberto Coronas, 2021. "Modeling and Dynamic Simulation of a Hybrid Liquid Desiccant System with Non-Adiabatic Falling-Film Air-Solution Contactors for Air Conditioning Applications in Buildings," Energies, MDPI, vol. 14(2), pages 1-20, January.
    18. Luo, Yimo & Yang, Hongxing & Lu, Lin & Qi, Ronghui, 2014. "A review of the mathematical models for predicting the heat and mass transfer process in the liquid desiccant dehumidifier," Renewable and Sustainable Energy Reviews, Elsevier, vol. 31(C), pages 587-599.
    19. Abdel-Salam, Ahmed H. & Simonson, Carey J., 2014. "Annual evaluation of energy, environmental and economic performances of a membrane liquid desiccant air conditioning system with/without ERV," Applied Energy, Elsevier, vol. 116(C), pages 134-148.
    20. Cui, X. & Chua, K.J. & Yang, W.M., 2014. "Numerical simulation of a novel energy-efficient dew-point evaporative air cooler," Applied Energy, Elsevier, vol. 136(C), pages 979-988.
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    22. 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.
    23. 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.
    24. Shen, Suping & Cai, Wenjian & Wang, Xinli & Wu, Qiong & Yon, Haoren, 2017. "Investigation of liquid desiccant regenerator with fixed-plate heat recovery system," Energy, Elsevier, vol. 137(C), pages 172-182.
    25. Keniar, Khoudor & Ghali, Kamel & Ghaddar, Nesreen, 2015. "Study of solar regenerated membrane desiccant system to control humidity and decrease energy consumption in office spaces," Applied Energy, Elsevier, vol. 138(C), pages 121-132.

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