الفهرس 
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Abstract
In a liquid desiccant air conditioning system, the regenerator is one of the essential components. The effectiveness of the regenerator directly influences the system performance. An experimental investigation on the performance of packed tower for regeneration of liquid desiccant is carried out. The experimental test unit has been designed and installed in the combustion lab., Faculty of Engineering, Mansoura University, Egypt. A solution of calcium chloride is used as a working desiccant with a packing of burned clay pieces with a random shape, its porosity is about 0.22 and the average size and weight of the piece are about (90.25 cm3, 88.4 gram) respectively. The input variables used in the experiment are air inlet temperature, air flow rate and solution flow rate. The outlet parameters which are measured or calculated from the experimental results are air outlet temperature, air humidity ratio, desiccant solution outlet temperature and concentration. To illustrate the effect of air and liquid desiccant parameters on the outlet variables the experimental results are plotted. Based on these results, higher air inlet temperature (Tai = 60: 120 °C) where the air inlet humidity ratio (0.0127: 0.0130 kg/kgda) results in higher average air outlet humidity ratio (0.0206: 0.0334 kg/kgda) and the percentage change of desiccant solution concentration (2.23: 8.62 %) respectively. And higher air flow rate (Ma = 0.0252: 0.0683 m3/s) where the air inlet humidity ratio (0.0147: 0.0184 kg/kgda) results in higher average air outlet humidity ratio (0.0245: 0.0312 kg/kgda) and the percentage change of desiccant solution concentration (2.83: 11.41 %) respectively. Increase in solution flow rate (Ms = 1: 3 LPM) where the air inlet humidity ratio (0.0175: 0.0148 kg/kgda) results in lower average air outlet humidity ratio (0.0278: 0.0267 kg/kgda) and the percentage change of desiccant solution concentration (10.65: 7.90 %) respectively.