Abstract:

A mathematical model for exergy analysis has been built to investigate the performance of liquid desiccant dehumidification and cooling system based on LiCl solution.Efforts are focused on exergy loss in each component, as well as the influence of desiccant solution and air inlet parameters on dehumidifier (demonstrated by exergy efficiency of dehumidifier).It was found that: (1) air velocity and humidity have dominanted influence on dehumidifier performance; (2) in the liquid desiccant dehumidification and cooling system, the biggest part of exergy loss happens in solution-hot water heat exchanger, 24.5%, followed by solution-solution recuperator and cooling water-solution heat exchanger, which accounts for 24.4% and 22.8% respectively.Reducing exergy loss in heat exchanger is the key way to improve the system exergy efficiency.