Effect of Dehumidification in Fluidized Bed and Packed Bed for Designing Continuous Dehumidifier
Keywords:
dehumidification, solid desiccant, silica gelAbstract
Dehumidification with continuous dehumidifier is the temperature swing adsorption process. The objective of this study is to evaluate the optimal condition to design continuous dehumidifier driven by waste heat. The adsorbent was silica gel. This experiment studied parameters that affect the efficiency of adsorption process and desorption process. The parameters were height of silica gel in adsorption process, velocity of air in adsorption - desorption process and temperature of hot air in desorption process. This study compared between fluidized bed and packed bed. The results showed that the optimal condition for adsorption process is fluidized bed at high air velocity and high height of silica gel. As a result, the pressure drop and exit air temperature of fluidized bed are lower than of packed bed. The optimal condition for the desorption process is 70-80 ◦C with high velocity, which does not exceed minimum fluidization velocity of 0.86 m/s
References
[2] M. Sultan, I. EI-Sharkawy, T. Miyazaki, B. Saha and S. Koyama, “An overview of solid desiccant dehumidification and air conditioning system,” Renewable and Sustainable Energy Reviews, Vol.46, pp.16-29, 2015.
[3] S. Misha, S.Mat, M.H.Ruslan and K.Sopian, “Review of solid / liquid desiccant in the drying applications and its regeneration methods,” Renewable and Sustainable Energy Reviews, Vol.16, pp.4686-4707, 2012.
[4] A.Yadav and V.Bajpai, “Optimization of operating parameters of desiccant wheel for rotation speed,” International Journal of Advanced Science and Technology, Vol.32, pp.109-116, 2011.
[5] A. M. Hamed, W. R. Abd El Rahman and S.H. El-Emam, “Experimental study of the transient adsorption/desorption characteristics of silica gel particles in fluidized bed,” Energy, Vol.35, pp.2468-2483, 2010.
[6] A.E. Kabeel, “Adsorption-desorption operation of multilayer desiccant packed bed for dehumidification applications,” Renewable Energy, Vol.34, pp.255-265, 2009.
[7] R. Surbkar, T. Wongsiriamnuay and S. Surbkar, “Foundation of the Ergun equation for the calculation of minimum fluidizing velocity of solid particles,” Journal of the Thai Society of Agricultural Engineering, Vol.8, No.1, pp.24–33, 2012.
[8] C.H.Chen, G.Schmid, C.T.Chan, Y.C.Chiang and S.L.Chen, “Application of silica gel fluidized bed for air-conditioning systems,” Applied Thermal Engineering, Vol.89, pp.229-238, 2015.
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