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A desiccant-enhanced evaporative air conditioner: Numerical model and experiments

机译：干燥剂增强型蒸发式空调的数值模型与实验

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This article presents modeling and experimental results on a recently proposed liquid desiccant air conditioner, which consists of two stages: a liquid desiccant dehumidifier and an indirect evaporative cooler. Each stage is a stack of channel pairs, where a channel pair is a process air channel separated from an exhaust air channel with a thin plastic plate. In the first stage, a liquid desiccant film, which lines the process air channels, removes moisture from the air through a porous hydrophobic membrane. An evaporating water film wets the surface of the exhaust channels and transfers the enthalpy of vaporization from the liquid desiccant into an exhaust airstream, cooling the desiccant and enabling lower outlet humidity. The second stage is a counterflow indirect evaporative cooler that siphons off and uses a portion of the cool-dry air exiting the second stage as the evaporative sink. The objectives of this article are to (1) present fluid-thermal numerical models for each stage, (2) present experimental results of prototypes for each stage, and (3) compare the modeled and experimental results. Several experiments were performed on the prototypes over a range of inlet temperatures and humidities, process and exhaust air flow rates, and desiccant concentrations and flow rates. The model predicts the experiments within ±10%.
机译：本文介绍了最近提出的液态干燥剂空调的建模和实验结果，该空调包括两个阶段：液态干燥剂除湿机和间接蒸发冷却器。每个阶段都是一堆通道对，其中通道对是一个过程空气通道，该过程空气通道与排气通道之间用一块薄塑料板隔开。在第一阶段，衬有工艺空气通道的液体干燥剂薄膜通过多孔疏水膜从空气中去除水分。蒸发的水膜会润湿排气通道的表面，并将蒸发的焓从液体干燥剂转移到排气流中，从而冷却干燥剂并降低出口湿度。第二阶段是逆流间接蒸发冷却器，该虹吸器虹吸掉并将第二阶段中流出的一部分冷干空气用作蒸发池。本文的目的是（1）提供每个阶段的流体热数值模型，（2）提供每个阶段的原型实验结果，以及（3）比较建模结果和实验结果。在入口温度和湿度，工艺和排气流速以及干燥剂浓度和流速的范围内，对原型进行了几次实验。该模型预测实验在±10％以内。

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