Thermodynamic Dynamic Characteristics of the Internally-cooled Membrane-based Liquid Desiccant Air Dehumidification System

In this paper, the thermodynamic dynamic characteristics of the internally-cooled membrane-based liquid dehumidification system are studied. The thermodynamic dynamic model of the whole system is established based on the numerical modeling of the heat and mass transfer process inside the key components such as the dehumidifier, the dehumidification liquid tank and the regeneration liquid tank. The calculation results show that the internally-cooled membrane-based liquid desiccant air dehumidification system has excellent dehumidification and cooling performances under high temperature and humidity environment in summer. At the beginning of the system startup, the temperatures of the dehumidification liquid tank and the regeneration liquid tank are changed sharply and then reach stability about 10 minutes later, indicating that the thermal response of the system is relatively fast. When the dehumidification and regeneration processes of the system reach a relative balance, the energy efficiency ratio (COP) of the system reaches the maximum. © 2021, Science Press. All right reserved.