A heat pump driven and hollow fiber membrane-based liquid desiccant air dehumidification system: A transient performance study
A heat pump driven and hollow fiber membrane-based liquid desiccant air dehumidification system: A transient performance study
复制标题
热泵驱动的基于中空纤维膜的液体干燥剂空气除湿系统：瞬态性能研究
DOI：
10.1016/j.ijrefrig.2016.01.001
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Xu Jian-Chang
中科院分区：
文献类型：
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作者：
Zhang Ning;Zhang Li-Zhi;Xu Jian-Chang
热泵驱动和基于中空纤维膜的液体干燥剂系统已被用于空气除湿，因为它们能够防止液体干燥剂液滴跨越进入工艺空气并实现高能量效率。由于瞬态运行条件，如负载和天气条件，在这项研究中提出了一个新的系统的瞬态模型。在实验和模型仿真的基础上，分析了系统在启动和正常运行阶段的瞬态行为。结果表明，溶液的初始浓度和容器中溶液的体积在启动过程中起关键作用，而初始温度的影响较小。调节压缩机速度是跟踪负载和天气波动的可行方法。本文所建立的模型对空气预热器的控制和优化是必要的。
Heat pump driven and hollow fiber membrane based liquid desiccant systems have been adopted for air dehumidification because of their capabilities to prevent liquid desiccant droplets from crossing over into the process air and to achieve high energy efficiencies. Due to the transient operating conditions like load and weather conditions, a transient model for the novel system is proposed in this study. Based on experiments and model simulations, the transient behaviors of the system are analyzed both at the start-up and in the normal operation periods. It is found that the initial concentration of the liquid desiccant and the volume of solution stored in the container play key roles at the start-up period, while the initial temperature has less influences. Adjusting the compressor speed is a feasible way to track the load and weather fluctuations. The model developed in this work is necessary for the control and optimization of the air dehumidification technology.