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An experimental study of structured packing dehumidifier/regenerator operating with liquid desiccant

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  • Bassuoni, M.M.

Abstract

The present work presents an experimental investigation on the performance of the structured packing cross flow desiccant dehumidification system (DDS). This system is referred as DDS; its heart is the dehumidifier/regenerator. It is used to meet a latent heat load by air dehumidification. Calcium chloride (CaCl2) solution is used as the working desiccant material in this system. The structured packing has a density (specific surface area) of 390m2/m3, corrugation angle of 60° and void fraction of 0.88. The effect of relevant parameters such as air flow rate, desiccant solution flow rate, desiccant solution temperature and concentration and packing thickness on the performance of the system is studied. The performance of the system is evaluated using the mass transfer coefficient, moisture removal rate (MMR), effectiveness and the coefficient of performance (COP). The remarkable increase of mass transfer coefficient and MRR for both deh/reg is observed by increasing both air and solution flow rates. Eventually, the payback period (PP) of the DDS is 11 months with annual running cost savings (ΔCRC) of about 31.24% compared with vapor compression system (VCS) dehumidification. The overall environmental impacts of DDS are nearly 0.63 of VCS. This may emphasize the need of incorporating a desiccant system along with air conditioning applications.

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  • Bassuoni, M.M., 2011. "An experimental study of structured packing dehumidifier/regenerator operating with liquid desiccant," Energy, Elsevier, vol. 36(5), pages 2628-2638.
    • Handle: RePEc:eee:energy:v:36:y:2011:i:5:p:2628-2638
    DOI: 10.1016/j.energy.2011.02.004
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    Cited by:

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    8. Ramzy, Ahmed K. & Kadoli, Ravikiran & T.P., Ashok Babu, 2013. "Experimental and theoretical investigations on the cyclic operation of TSA cycle for air dehumidification using packed beds of silica gel particles," Energy, Elsevier, vol. 56(C), pages 8-24.
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    10. 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.
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    13. 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).
    14. Zhang, Qunli & Li, Yanxin & Zhang, Qiuyue & Ma, Fengge & Lü, Xiaoshu, 2024. "Application of deep dehumidification technology in low-humidity industry: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 193(C).
    15. Song, Xia & Zhang, Lun & Zhang, Xiaosong, 2018. "NTUm-based optimization of heat or heat pump driven liquid desiccant dehumidification systems regenerated by fresh air or return air," Energy, Elsevier, vol. 158(C), pages 269-280.
    16. Sunil Nain & Sanjay Kajal & Anuradha Parinam, 2020. "Thermal performance of desiccant-based solar air-conditioning system with silica gel coating," Environment, Development and Sustainability: A Multidisciplinary Approach to the Theory and Practice of Sustainable Development, Springer, vol. 22(1), pages 281-296, January.
    17. 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.
    18. 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.
    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. Shukla, D.L. & Modi, K.V., 2022. "Influence of distinct input parameters on performance indices of dehumidifier, regenerator and on liquid desiccant-operated evaporative cooling system – A critical review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 168(C).
    21. De Antonellis, Stefano & Joppolo, Cesare Maria & Molinaroli, Luca & Pasini, Alberto, 2012. "Simulation and energy efficiency analysis of desiccant wheel systems for drying processes," Energy, Elsevier, vol. 37(1), pages 336-345.
    22. N’Tsoukpoe, Kokouvi Edem & Yamegueu, Daniel & Bassole, Justin, 2014. "Solar sorption refrigeration in Africa," Renewable and Sustainable Energy Reviews, Elsevier, vol. 35(C), pages 318-335.
    23. Shih-Cheng Hu & Angus Shiue & Yi-Shiung Chiu & Archy Wang & Jacky Chen, 2016. "Simplified Heat and Mass Transfer Model for Cross-Flow and Countercurrent Flow Packed Bed Tower Dehumidifiers with a Liquid Desiccant System," Sustainability, MDPI, vol. 8(12), pages 1-13, December.

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