Dynamic modeling of a liquid desiccant dehumidifier
Dynamic modeling of a liquid desiccant dehumidifier
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DOI：
10.1016/j.apenergy.2016.07.085
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发表时间：
2016-10
期刊：
影响因子：
11.2
通讯作者：
Xian Li;Shuai Liu;K. Tan;Qing-guo Wang;W. Cai;Lihua Xie
中科院分区：
文献类型：
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作者：
Xian Li;Shuai Liu;K. Tan;Qing-guo Wang;W. Cai;Lihua Xie
液体除湿空调系统以其良好的应用前景成为空调领域的研究热点。文献中已经报道了许多模型，但由于各种原因，它们很少适用于控制设计。本文从控制角度出发，基于传热传质原理，提出了液体除湿器的简化动态模型，其中流体性质的空间差异通过离散化和沿着流动方向的动态相互作用来近似。未知模型参数首先通过Levenberg-Marquardt算法从静态实验数据中估计，然后通过扩展卡尔曼滤波器从动态实验数据中细化。所提出的模型在实验验证中表现良好，并有望应用于未来的控制设计和故障诊断应用。
The liquid desiccant dehumidification system is becoming a hotspot in air dehumidification due to its promising prospects. Many models have been reported in the literature, but they are rarely applicable to control design due to various reasons. In this paper, a simplified dynamic model of liquid desiccant dehumidifier is proposed from a control point of view based on the heat and mass transfer principles, where the spatial differentials of fluid properties are approximated by discretization and dynamic interaction along the flow direction. Unknown model parameters are first estimated from static experimental data through the Levenberg-Marquardt algorithm and then refined from dynamic experimental data through the extended Kalman filter. The proposed model performs well in the experimental validation and is expected to be applied in a future control design and fault diagnosis application.