内冷型膜式液体除湿系统热力学动态特性研究

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

本文对内冷型膜式液体除湿系统的动态特性开展研究,通过对除湿器、除湿液箱、再生液箱等关键部件的传热传质过程进行数值建模,从而构建整个系统的热力学动态模型。计算结果表明,在夏季高温高湿环境下内冷型膜除湿系统具有良好的除湿降温性能。系统启动初期,除湿液箱和再生液箱的温度急剧变化,并在大概10分钟后达到稳定,说明系统热响应较快。当系统的除湿和再生过程达到相对平衡后,系统的能效比最大。

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.