Hi'/> Performance analysis of an internally-cooled plate membrane liquid desiccant dehumidifier (IMLDD): An analytical solution approach
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Performance analysis of an internally-cooled plate membrane liquid desiccant dehumidifier (IMLDD): An analytical solution approach

机译：内部冷却的板式膜式液体干燥剂除湿机（IMLDD）的性能分析：一种分析解决方案

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摘要

Highlights•An internally-cooled plate membrane liquid desiccant dehumidifier (IMLDD) is proposed.•The IMLDD is used for liquid desiccant air dehumidification.•A coupled heat and mass transfer model in the IMLDD are established.•An analytical solution is obtained and validated experimentally.•The water inlet temperature is recommended to be set as somewhat smaller than the solution inlet temperature.AbstractAn internally-cooled parallel-plate membrane-based liquid desiccant dehumidifier (IMLDD) with cooling tubes inside the solution channels has been used for air dehumidification. The concept is similar to a three-fluid heat and mass exchanger containing processing air, liquid desiccant, and refrigerant streams. The processing air and the liquid desiccant streams flow in the neighboring channels, which are formed by the plate membranes. A row of the cooling tubes are installed in each solution channel to take away the absorption heat generated in the solution by absorbing the water vapor transferred from the processing air across the membranes into the solution. A lumped parameter model is established in a unit cell containing an air channel, a plate membrane, a solution channel, and a row of the cooling tubes, to study the heat and mass transports in the IMLDD. An analytical solution of the normalized governing equations is obtained based on the dimensionless parameters, which have their specific physical meanings. Sensible cooling effectiveness, dehumidification effectiveness, dehumidification rate, energy transfer rate of the air stream, and the ratio of the sensible heat transfer rate of the water stream to the energy transfer rate of the air stream are then calculated. Only a few operating conditions of inlet water temperatures and sensible heat capacity ratios from previous studies have been employed to validate the model. However more validations would be conducted in future under more operating conditions. It can be found that the performances of the IMLDD are largely improved when the water inlet temperature is decreased to keep the solution temperature always in a relatively small level. The water inlet temperature is recommended to be set as about 20 °C, which is somewhat smaller than the solution inlet temperature.
机译： 突出显示 • 提出了一种内部冷却的板膜式液体干燥剂除湿机（IMLDD）。 • IMDLD用于液体干燥剂空气除湿。 • 在IMLDD中建立了传热传质耦合模型。 •< / ce：label> 获得了解析解决方案，并进行了实验验证。 < / ce：list-item> • 进水温度建议将其设置为略低于溶液入口温度。 摘要 内部冷却的平行板膜式液体干燥剂除湿机（IMLDD），内部装有冷却管通道已用于空气除湿。该概念类似于包含处理空气，液体干燥剂和制冷剂流的三流体热交换器。处理空气和液体干燥剂流在相邻的通道中流动，这些通道由板膜形成。一排冷却管安装在每个溶液通道中，通过吸收从处理空气通过膜进入溶液的水蒸气，带走溶液中产生的吸收热。在包含空气通道，平板膜，溶液通道和一排冷却管的单元格中建立集总参数模型，以研究IMLDD中的热量和质量传递。基于无量纲参数，获得了规范化控制方程的解析解，这些参数具有特定的物理意义。然后计算出明显的冷却效率，除湿效率，除湿率，空气流的能量传递率，以及水流的显热传递率与空气流的能量传递率之比。仅使用了先前研究中的进水温度和显热容量比的少数运行条件来验证模型。但是，将来将在更多的运行条件下进行更多的验证。可以发现，当降低进水温度以将溶液温度始终保持在相对较小的水平时，IMDLD的性能将大大提高。建议将进水温度设置为约20°C，这比溶液的进水温度略低。

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  • 来源
  • 作者

    Si-Min Huang; Minlin Yang; Bing Hu; Shi Tao; Frank G.F. Qin; Wanliang Weng; Wenhao Wang; Jian Liu;

  • 作者单位

    Key Laboratory of Distributed Energy Systems of Guangdong Province, Dongguan University of Technology;

    Key Laboratory of Distributed Energy Systems of Guangdong Province, Dongguan University of Technology;

    Key Laboratory of Distributed Energy Systems of Guangdong Province, Dongguan University of Technology;

    Key Laboratory of Distributed Energy Systems of Guangdong Province, Dongguan University of Technology;

    Key Laboratory of Distributed Energy Systems of Guangdong Province, Dongguan University of Technology;

    Key Laboratory of Distributed Energy Systems of Guangdong Province, Dongguan University of Technology;

    Key Laboratory of Distributed Energy Systems of Guangdong Province, Dongguan University of Technology;

    Key Laboratory of Distributed Energy Systems of Guangdong Province, Dongguan University of Technology;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Analytical solution; Heat transfer; Mass transfer; Internally-cooled dehumidifier; Plate membrane; Liquid desiccant air dehumidification;

    机译：分析溶液;传热;传质;内部冷却的除湿机;板膜;液体干燥剂空气除湿;

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