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Regeneration of silica gel in multi-shelf regenerator

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  • Singh, Sukhmeet
  • Singh, Parm Pal

Abstract

In the present paper an investigation on the regeneration of solid desiccant (silica gel) in a modified design of dehumidifier called “Multi-shelf Dehumidifier”, has been reported. A “Packed Bed Dehumidifier” was used as control. Both the dehumidifiers were fabricated and tested simultaneously. The effect of regeneration air temperature, bed-air velocity and number of shelves on regeneration of silica gel was investigated. The range of regeneration air temperature was 42–72°C, while bed-air velocity varied from 0.175-0.55 m/s and number of shelves from 2 to 4. The regeneration time decreased with the increase in regeneration air temperature, bed-air velocity as well as number of shelves. The values of regeneration air temperature and bed-air velocity for minimum energy input were found to be 52°C and 0.175 m/s irrespective of the number of shelves. The effect of the rest period was investigated for these optimum values of regeneration air temperature and air velocity for a number of shelves varying from 2 to 4. The rest periods used were 30, 60 and 180 mins. The regeneration time reduced with increase in rest period for all the values of number of shelves, but the reduction in regeneration time was not appreciable.

Suggested Citation

  • Singh, Sukhmeet & Singh, Parm Pal, 1998. "Regeneration of silica gel in multi-shelf regenerator," Renewable Energy, Elsevier, vol. 13(1), pages 105-119.
    • Handle: RePEc:eee:renene:v:13:y:1998:i:1:p:105-119
    DOI: 10.1016/S0960-1481(97)00056-6
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    Cited by:

    1. Zhang, Weijiang & Yao, Ye & He, Beixing & Wang, Rongshun, 2011. "The energy-saving characteristic of silica gel regeneration with high-intensity ultrasound," Applied Energy, Elsevier, vol. 88(6), pages 2146-2156, June.
    2. 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.
    3. Kabeel, A.E., 2009. "Adsorption–desorption operations of multilayer desiccant packed bed for dehumidification applications," Renewable Energy, Elsevier, vol. 34(1), pages 255-265.
    4. 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.
    5. Amit Kumar & Avadhesh Yadav, 2017. "Experimental investigation of solar-powered desiccant cooling system by using composite desiccant “CaCl2/jute”," Environment, Development and Sustainability: A Multidisciplinary Approach to the Theory and Practice of Sustainable Development, Springer, vol. 19(4), pages 1279-1292, August.
    6. Pramuang, Surajitr & Exell, R.H.B., 2007. "The regeneration of silica gel desiccant by air from a solar heater with a compound parabolic concentrator," Renewable Energy, Elsevier, vol. 32(1), pages 173-182.

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