Abstract
The purpose of this study is to investigate the effect of the inlet solution temperature on the performance of an adiabatic cross-flow regenerator using a lithium chloride (LiCl) aqueous solution, and to propose the optimal inlet solution temperature when operating this type of regenerator. In the experimental tests, the inlet solution temperature range varied from 50 to 90°C. The tests were carried out at 10°C intervals while the other conditions remained constant. The measurement parameters for the test were the inlet air dry-bulb temperature and humidity ratio, outlet air dry-bulb temperature and humidity ratio, air volume flow, solution density, and inlet and outlet solution temperatures. The regeneration effectiveness and coefficient of performance (COP) were selected to assess the heat and mass transfer performance of the cross-flow regenerator. The most important finding of this research was to determine the optimal solution inlet temperature in the cross-flow regenerator with the LiCl aqueous solution considering both the regenerator performance and energy consumption. The test results show that the recommended inlet solution temperature is 60°C, considering both regeneration effectiveness and COP.
Highlights
Liquid desiccant systems have been introduced as nonvapor compression systems in the air conditioning of buildings [1]
The experiment was conducted with the solution temperature ranging from 53°C to 84°C and the results showed that increasing the inlet solution temperature increased the moisture removal rate in the regenerator, while the regeneration effectiveness and the coefficient of performance (COP) of the dehumidification system (DDS) were decreased
When the room temperature is about 25°C, the COP of the regenerator was obtained as shown in Figure 5 all of the COP were lower than 1
Summary
Liquid desiccant systems have been introduced as nonvapor compression systems in the air conditioning of buildings [1]. These systems have the potential to lower carbon emissions and reduce the negative environmental impact of the conventional air conditioning system. The liquid desiccant system comprises an absorber and a regenerator. The regenerator is one of the main components in the liquid desiccant system and it is used for the regeneration of a weak solution into a strong solution through the utilization of a heat source. Heat is the main issue for the regenerator because it accounts for the majority of the energy consumed by the liquid desiccant system and influences the performance of the system
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