الفهرس 
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Abstract
Liquid desiccant air conditioning systems are an important another to conventional vapor compression equipment. Liquid desiccant cooling systems require two desiccant-air contact devices namely a dehumidifier and a regenerator. Dehumidifier is a device that removes moisture from air and regenerator is used to re-concentrate the weak desiccant solution during the process. In present study the effect of the regeneration performance on liquid desiccant system is examined.
The effects of the desiccant solution temperature (40°C - 70°C), air flow rate (0.04m3/s - 0.1m3/s), air inlet temperature (31°C - 40°C), air inlet humidity ratio (12gw/kgda–25gw/kgda) and desiccant solution concentration (20% and 40%) on the humidity rise percentage, regeneration rate, regeneration thermal efficiency and humidity reduction percentage of dehumidifier are studied.
In the present work, an experiment set-up is designed and it is consists mainly of dehumidifier/regenerator packed bed, supply air system process, Calcium-Chloride solution system, solution cooling circuit and solution heating system. Calcium-Chloride solution was utilized as the liquid desiccant with different concentrations which absorbs the water vapor from process air in the dehumidifier side and rejects it in the regenerator side.
The results showed that, increasing the desiccant solution temperature for both desiccant solution concentrations causes an increase in each of the humidity rise percentage, the regeneration rate (M_r) and the regeneration thermal efficiency. Also, the results indicated that, increasing the volume flow rate of desiccant solution for both desiccant solution concentrations causes a decrease in the humidity rise percentage. Moreover, increasing the air flow rate increases the humidity rise percentage for both desiccant solution concentrations. Finally, increasing the desiccant solution temperature of regenerator for both desiccant solution concentrations causes an increase the humidity reduction percentage of dehumidifier.
Empirical correlations of humidity rise percentage, regeneration rate and regeneration thermal efficiency as function of (m_s⁄m_air ), (T_s⁄T_air ) and (x) are obtained.