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Experimental investigation on the adsorption/desorption processes using solid desiccant in an inclined-fluidized bed

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  • Hamed, Ahmed M.

Abstract

This paper presents an experimental investigation on the adsorption and desorption operations in an inclined-fluidized bed using silica gel as the working desiccant. The experimental system involves a circular glass tube containing the particles of silica gel, which is tested at an inclination angle of 45°. The moisture capacity of the bed is measured using a gravimetric technique. Process air at nearly constant ambient parameters (humidity and temperature) and different values of flow rate are used during adsorption. Moisture concentration in the bed is analyzed through visual observation of the color of silica gel particles. Experimental measurements indicate that the regeneration and adsorption rates are highly dependent on the air stream velocity. A satisfactory regeneration rate is confirmed at regeneration temperature as low as 90°C when inclined-fluidized bed is applied. The transient-state moisture transfer rates during adsorption and desorption are presented. Finally, observation of the movement and color of the particles in the bed show regular circulation and homogenous distribution of moisture concentration.

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  • Hamed, Ahmed M., 2005. "Experimental investigation on the adsorption/desorption processes using solid desiccant in an inclined-fluidized bed," Renewable Energy, Elsevier, vol. 30(12), pages 1913-1921.
    • Handle: RePEc:eee:renene:v:30:y:2005:i:12:p:1913-1921
    DOI: 10.1016/j.renene.2005.01.001
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    References listed on IDEAS

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    1. Hamed, Ahmed M., 2002. "Theoretical and experimental study on the transient adsorption characteristics of a vertical packed porous bed," Renewable Energy, Elsevier, vol. 27(4), pages 525-541.
    2. Hamed, Ahmed M., 2003. "Desorption characteristics of desiccant bed for solar dehumidification/humidification air conditioning systems," Renewable Energy, Elsevier, vol. 28(13), pages 2099-2111.
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    1. Ge, T.S. & Zhang, J.Y. & Dai, Y.J. & Wang, R.Z., 2017. "Experimental study on performance of silica gel and potassium formate composite desiccant coated heat exchanger," Energy, Elsevier, vol. 141(C), pages 149-158.
    2. Yao, Ye & Yang, Kun & Liu, Shiqing, 2014. "Study on the performance of silica gel dehumidification system with ultrasonic-assisted regeneration," Energy, Elsevier, vol. 66(C), pages 799-809.
    3. Liang, Jyun-De & Hsu, Chien-Yeh & Hung, Tai-Chih & Chiang, Yuan-Ching & Chen, Sih-Li, 2018. "Geometrical parameters analysis of improved circulating inclined fluidized beds for general HVAC duct systems," Applied Energy, Elsevier, vol. 230(C), pages 784-793.
    4. Zouaoui, Ahlem & Zili-Ghedira, Leila & Ben Nasrallah, Sassi, 2016. "Open solid desiccant cooling air systems: A review and comparative study," Renewable and Sustainable Energy Reviews, Elsevier, vol. 54(C), pages 889-917.
    5. Tu, Rang & Liu, Xiao-Hua & Jiang, Yi, 2013. "Performance analysis of a new kind of heat pump-driven outdoor air processor using solid desiccant," Renewable Energy, Elsevier, vol. 57(C), pages 101-110.
    6. Wojciech Kalawa & Karol Sztekler & Agata Mlonka-Mędrala & Ewelina Radomska & Wojciech Nowak & Łukasz Mika & Tomasz Bujok & Piotr Boruta, 2023. "Simulation Analysis of Mechanical Fluidized Bed in Adsorption Chillers," Energies, MDPI, vol. 16(15), pages 1-22, August.
    7. Misha, S. & Mat, S. & Ruslan, M.H. & Sopian, K., 2012. "Review of solid/liquid desiccant in the drying applications and its regeneration methods," Renewable and Sustainable Energy Reviews, Elsevier, vol. 16(7), pages 4686-4707.
    8. Hamed, Ahmed M. & Abd El Rahman, Walaa R. & El-Emam, S.H., 2010. "Experimental study of the transient adsorption/desorption characteristics of silica gel particles in fluidized bed," Energy, Elsevier, vol. 35(6), pages 2468-2483.
    9. Shamim, Jubair A. & Hsu, Wei-Lun & Paul, Soumyadeep & Yu, Lili & Daiguji, Hirofumi, 2021. "A review of solid desiccant dehumidifiers: Current status and near-term development goals in the context of net zero energy buildings," Renewable and Sustainable Energy Reviews, Elsevier, vol. 137(C).
    10. Chiang, Yuan-Ching & Chen, Chih-Hao & Chiang, Yi-Chin & Chen, Sih-Li, 2016. "Circulating inclined fluidized beds with application for desiccant dehumidification systems," Applied Energy, Elsevier, vol. 175(C), pages 199-211.
    11. Yeboah, S.K. & Darkwa, J., 2016. "A critical review of thermal enhancement of packed beds for water vapour adsorption," Renewable and Sustainable Energy Reviews, Elsevier, vol. 58(C), pages 1500-1520.

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