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首页> 外文期刊>International Journal of Heat and Mass Transfer >Experimental study on heat and mass transfer characteristics for a desiccant-coated fin-tube heat exchanger
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Experimental study on heat and mass transfer characteristics for a desiccant-coated fin-tube heat exchanger

机译：干燥剂包覆翅片管换热器传热传质特性的实验研究

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摘要

In this study, we investigated the heat and mass transfer characteristics of a desiccant-coated fin-tube heat exchanger (DCHE), in which the desiccant was coated on the surface of a conventional fin-tube heat exchanger. It differs from desiccant wheels in which the desiccant is cooled or heated by the fluid inside the tube during the adsorption or desorption process, and from conventional heat exchangers, in which moisture transfer occurs and the latent heat transfer is caused by phase change of the adsorbed moisture. Firstly, the heat and mass-transfer model for the DCHE was presented in this paper, whereupon the influences of air velocity, desiccant temperature and moisture content on the overall mass-transfer coefficient were separately analyzed for desorption and adsorption processes. It emerged that the overall mass-transfer coefficient rose with increasing air velocity. The moisture content of the desiccant significantly impacted on the overall mass-transfer coefficient. Higher desiccant temperature resulted in lower overall mass-transfer coefficient. Finally, the heat transfer model given in this paper was applied to calculate the DCHE heat transfer rate and the values obtained by calculation were observed to correlate well with the experimental results.
机译：在这项研究中，我们研究了干燥剂涂覆的翅片管换热器（DCHE）的传热和传质特性，其中，干燥剂涂覆在常规翅片管换热器的表面上。它不同于干燥剂轮，在干燥剂轮中，在吸附或解吸过程中，干燥剂被管内的流体冷却或加热；与传统的热交换器不同，在常规的热交换器中，发生水分传递，而潜热传递是由于吸附剂的相变而引起的。湿气。首先，提出了DCHE的传热传质模型，然后分别分析了空气流速，干燥剂温度和水分含量对总传质系数的影响，以进行解吸和吸附过程。结果表明，整体传质系数随空气速度的增加而增加。干燥剂的水分含量显着影响整体传质系数。较高的干燥剂温度导致较低的整体传质系数。最后，采用本文给出的传热模型来计算DCHE的传热速率，并观察到通过计算得到的值与实验结果良好相关。

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