Analysis on hollow fiber membrane-based liquid desiccant dehumidification system

Humidity is one of the most influence factors of human thermal comfort, and the liquid desiccant system is an effective dehumidification mode. However, in traditional liquid desiccant system, the liquid droplet entrainment and air pollution often happens between wet air and the liquid desiccant solution because of the direct contact mode. In this study, a novel water vapor transmission mode based on the hydrophobic microporous fiber membrane is proposed. On the one hand, the path of liquid droplet entrainment is shut down due to the closed cycle of liquid desiccant in membrane absorber; on the other hand, only the water vapor can transfer across the membrane because of the micro construction and porous of membrane material, and the dehumidification effect is the major problem. Therefore, numerical simulation of hollow fiber membrane-based liquid desiccant dehumidification is set up, and different operating conditions in both wet air and liquid desiccant are changed to analyze the dehumidification effect.