International Journal of Sustainable and Green Energy
Volume 2, Issue 1, January 2013, Pages: 18-25
Received: Dec. 11, 2012;
Published: Jan. 10, 2013
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Y. A. F. El-Samadony, Mechanical Power Engineering Department, Faculty of Engineering, Tanta University, Egypt
A. M. Hamed, Mechanical Engineering Department, Faculty of Engineering, Taif University, KSA; Mechanical Power Department, Faculty of Engineering, Mansoura University, Egypt
A. E. Kabeel, Mechanical Power Engineering Department, Faculty of Engineering, Tanta University, Egypt
In the present work, experimental investigation on the dynamic performance of sealed and less maintenance vertical packed porous bed desiccant dehumidification system has been carried out. The desiccant bed operates as an adsorber and then operates as a regenerator intermittently. In the experimental part of this investigation, silica gel is applied as the desiccant material. Hot air from an air heater is blown through the bed using an air blower in the regeneration process. System performance at different conditions of flowing air is demonstrated. The experimental tests were carried out at different conditions of inlet air and initial bed parameters. Temperature and humidity of air at inlet and exit of the bed were measured. The obtained results show that air with inlet humidity ranging from 5.067 to 10.04 g/kg could be dehumidified, using silica gel, to a lower level of humidity (0.7754 g/kg). The relation between the studied parameters on the adsorption processes is correlated. Results show that the ''Rehabilitation period" in adsorption process could be eliminated if air mass flow rate is greater than 1.92 kg/hr per kg of silica gel.
Y. A. F. El-Samadony,
A. M. Hamed,
A. E. Kabeel,
Dynamic Performance Evaluation of Single Bed Desiccant Dehumidification System, International Journal of Sustainable and Green Energy.
Vol. 2, No. 1,
2013, pp. 18-25.
W. Pridasawas, Solar-Driven Refrigeration Systems with Focus on the Ejector Cycle, Doctoral Thesis, Stockholm, October 2006.
Waugaman, D.G., Kini, A., Kettleborough, C.F., 1993. A review of desiccant cooling systems. Journal of Energy Resources Technology 115, 1–8.
Mazzei, P., Minichiello, F., Palma, D., 2005. HVAC dehumidification systems for thermal comfort: a critical review. Applied Thermal Engineering 25, 677–707.
Daou, K., Wang, R., Xia, Z., 2006. Desiccant cooling air conditioning: a review. Renewable and Sustainable Energy Reviews 10, 55–77.
Pesaran A. A. and Bingham C. E. (1989) "Testing of Novel Desiccant Materials and Dehumidifier Matrices for Desiccant Cooling Applications," SERI/TP-254-3478.
J. Lee and Dae-Young Lee. (2012)" Sorption characteristics of a novel polymeric desiccant’, International journal of refrigeration, 35, PP 1940-1949.
A. Bakhtiar, F. Rokhman, and K. Hwan Choi, (2012)" A novel method to evaluate the performance of liquid desiccant air dehumidifier system, Energy and Buildings 44, 39–44.
Hamed, A. M. (2002) "Theoretical and Experimental Study on the Transient Adsorption Characteristics of a Vertical Packed Porous Bed," Renewable Energy, 27, 525-541.
Hamed. A. M. Abd-elrahman, W. R. and El-Emam, S. H. (2010) "Experimental study of the transient adsorption/desorption characteristics of silica gel particles in fluidized bed," Energy, 35, 6, 2468-2483.
Kabeel, A. E. (2009) "Adsorption–Desorption Operations of Multilayer Desiccant Packed Bed for Dehumidification Applications," Renewable Energy, 34, 255–265.
Abd-Elrahman, W. R. (2005) "Theoretical and Experimental Study on the Performance of a Fluidized Air Dryer," M.Sc. Thesis. Mechanical Engineering Department, Mansoura University, Egypt.
Awad, M. M., Ramzy A. K. Hamed A. M. and Bekheit M. M. (2008) "Theoretical and Experimental Investigation on the Radial Flow Desiccant Dehumidification Bed," Applied Thermal Engineering, 28, 75-85.
Ramzy A. K., Hamed A. M, Awad, M. M. and Bekheit M. M. (2010) "Theoretical investigation on the cyclic operation of radial flow desiccant bed dehumidifier" Journal of Engineering and Technology Research Vol. 2 (6), pp. 96-110.
Y. A. F. El-Samadony, A M. Hamed, and A E Kabeel (2013)"performance evaluation of single bed desiccant desorption process", Natural Resources, Vol. 3 (1)
ASHRAE Handbook-Applications (1997), American society of heating, ventilation and air conditioning Engineer, 1791 Tullie Circle, Atlanta, GA 30329, USA.
Holman JP, Experimental method for engineers, 6th ed. Singapore: McGraw-Hill; 1994.