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Predictions of moisture removal rate and dehumidification effectiveness for structured liquid desiccant air dehumidifier

Author

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  • Abdul-Wahab, S.A.
  • Zurigat, Y.H.
  • Abu-Arabi, M.K.

Abstract

In hot and humid climates such as in the Sultanate of Oman, the humidity puts extra load on the electric vapor-compression air conditioning (VAC) systems. Liquid and solid desiccants can reduce the moisture content of humid air and thus reduce the latent load imposed on the VAC systems. In the present work, the performance of air dehumidifiers using triethylene glygol (TEG) as desiccant was investigated. Three differently structured packing densities were used (77, 100 and 200 m2/m3). The performance of the dehumidifier was evaluated and expressed in terms of the moisture removal rate (mcond) and the dehumidifier effectiveness (εy). The experimental work was undertaken to study the effects of several influencing design factors on this performance. The design factors covered included the air and TEG flow rates, air and TEG inlet temperatures, inlet air humidity and the inlet TEG concentration. The desiccant flow rate investigated was much less than that covered in previous studies and the range of the inlet temperatures of air and desiccant was significantly wider. The objective this study was to use the multiple regression method and the principal component analysis to obtain statistical prediction models for the water condensation rate and the dehumidification effectiveness in terms of these design factors. The results of both techniques agree with each other affirmed that the desiccant flow rate, desiccant inlet concentration and air inlet temperature are the most significant variables in predicting mcond, whereas desiccant flow rate, air inlet temperature and packing density are the most significant variables in predicting εy.

Suggested Citation

  • Abdul-Wahab, S.A. & Zurigat, Y.H. & Abu-Arabi, M.K., 2004. "Predictions of moisture removal rate and dehumidification effectiveness for structured liquid desiccant air dehumidifier," Energy, Elsevier, vol. 29(1), pages 19-34.
    • Handle: RePEc:eee:energy:v:29:y:2004:i:1:p:19-34
    DOI: 10.1016/j.energy.2003.08.001
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    Cited by:

    1. Elsarrag, Esam & Igobo, Opubo N. & Alhorr, Yousef & Davies, Philip A., 2016. "Solar pond powered liquid desiccant evaporative cooling," Renewable and Sustainable Energy Reviews, Elsevier, vol. 58(C), pages 124-140.
    2. Luo, Jielin & Yang, Hongxing, 2022. "A state-of-the-art review on the liquid properties regarding energy and environmental performance in liquid desiccant air-conditioning systems," Applied Energy, Elsevier, vol. 325(C).
    3. Dai, Yuze & Liu, Feng & Sui, Jun & Wang, Dandan & Han, Wei & Jin, Hongguang, 2020. "Hybrid liquid desiccant air-conditioning system combined with marine aerosol removal driven by low-temperature heat source," Applied Energy, Elsevier, vol. 275(C).
    4. Yin, Yonggao & Qian, Junfei & Zhang, Xiaosong, 2014. "Recent advancements in liquid desiccant dehumidification technology," Renewable and Sustainable Energy Reviews, Elsevier, vol. 31(C), pages 38-52.
    5. 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.
    6. Ali Pakari & Saud Ghani, 2022. "Regression Models for Performance Prediction of Internally-Cooled Liquid Desiccant Dehumidifiers," Energies, MDPI, vol. 15(5), pages 1-19, February.
    7. Bassuoni, M.M., 2011. "An experimental study of structured packing dehumidifier/regenerator operating with liquid desiccant," Energy, Elsevier, vol. 36(5), pages 2628-2638.
    8. Zendehboudi, Alireza & Tatar, Afshin & Li, Xianting, 2017. "A comparative study and prediction of the liquid desiccant dehumidifiers using intelligent models," Renewable Energy, Elsevier, vol. 114(PB), pages 1023-1035.
    9. Kashish Kumar & Alok Singh & Saboor Shaik & C Ahamed Saleel & Abdul Aabid & Muneer Baig, 2022. "Comparative Analysis on Dehumidification Performance of KCOOH–LiCl Hybrid Liquid Desiccant Air-Conditioning System: An Energy-Saving Approach," Sustainability, MDPI, vol. 14(6), pages 1-22, March.
    10. Xie, Ying & Zhang, Tao & Liu, Xiaohua, 2016. "Performance investigation of a counter-flow heat pump driven liquid desiccant dehumidification system," Energy, Elsevier, vol. 115(P1), pages 446-457.
    11. Luo, Yimo & Wang, Meng & Yang, Hongxing & Lu, Lin & Peng, Jinqing, 2015. "Experimental study of the film thickness in the dehumidifier of a liquid desiccant air conditioning system," Energy, Elsevier, vol. 84(C), pages 239-246.
    12. Wen, Tao & Lu, Lin, 2019. "A review of correlations and enhancement approaches for heat and mass transfer in liquid desiccant dehumidification system," Applied Energy, Elsevier, vol. 239(C), pages 757-784.
    13. Enteria, Napoleon & Yoshino, Hiroshi & Mochida, Akashi, 2013. "Review of the advances in open-cycle absorption air-conditioning systems," Renewable and Sustainable Energy Reviews, Elsevier, vol. 28(C), pages 265-289.
    14. Bigham, Sajjad & Yu, Dazhi & Chugh, Devesh & Moghaddam, Saeed, 2014. "Moving beyond the limits of mass transport in liquid absorbent microfilms through the implementation of surface-induced vortices," Energy, Elsevier, vol. 65(C), pages 621-630.
    15. Wen, Tao & Luo, Yimo & Wang, Meng & She, Xiaohui, 2021. "Comparative study on the liquid desiccant dehumidification performance of lithium chloride and potassium formate," Renewable Energy, Elsevier, vol. 167(C), pages 841-852.
    16. Yang, Zili & Lian, Zhiwei & Li, Xi & Zhang, Kaisheng, 2015. "Concept of dehumidification perfectness and its potential applications," Energy, Elsevier, vol. 91(C), pages 176-191.
    17. Gao, W.Z. & Liu, J.H. & Cheng, Y.P. & Zhang, X.L., 2012. "Experimental investigation on the heat and mass transfer between air and liquid desiccant in a cross-flow dehumidifier," Renewable Energy, Elsevier, vol. 37(1), pages 117-123.
    18. Song, Xia & Zhang, Lun & Zhang, Xiaosong, 2019. "Analysis of the temperatures of heating and cooling sources and the air states in liquid desiccant dehumidification systems regenerated by return air," Energy, Elsevier, vol. 168(C), pages 651-661.
    19. Giampieri, Alessandro & Ma, Zhiwei & Ling-Chin, Janie & Bao, Huashan & Smallbone, Andrew J. & Roskilly, Anthony Paul, 2022. "Liquid desiccant dehumidification and regeneration process: Advancing correlations for moisture and enthalpy effectiveness," Applied Energy, Elsevier, vol. 314(C).
    20. Kumar, Ritunesh & Dhar, P.L. & Jain, Sanjeev, 2011. "Development of new wire mesh packings for improving the performance of zero carryover spray tower," Energy, Elsevier, vol. 36(2), pages 1362-1374.
    21. Zhang, Lun & Song, Xia & Zhang, Xiaosong, 2019. "Theoretical analysis of exergy destruction and exergy flow in direct contact process between humid air and water/liquid desiccant solution," Energy, Elsevier, vol. 187(C).

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