Comparative study between parallel and counter flow configurations between air and falling film desiccant in the presence of nanoparticle suspensions
Comparative study between parallel and counter flow configurations between air and falling film desiccant in the presence of nanoparticle suspensions
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DOI：
10.1002/er.908
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发表时间：
2003-06-25
影响因子：
4.6
通讯作者：
Khaled, ARA
中科院分区：
文献类型：
--
作者：
Ali, A;Vafai, K;Khaled, ARA
采用数值模拟的方法，对平行流和逆流两种结构下降膜干燥剂与空气之间的传热传质过程进行了对比研究。将纳米颗粒悬浮液添加到降膜干燥剂中以研究传热和传质增强作用。计算结果表明，在较宽的参数范围内，平行流道比逆流流道能提供更好的冷却效果。低空气雷诺数提高了空气的除湿和冷却速率，高空气雷诺数提高了液体除湿剂的再生速率。通道高度的增加有利于增强空气的除湿和冷却过程，提高除湿剂的再生率。随着纳米粒子体积分数和分散因子的增加，空气的冷却速度和冷却速度都得到了提高。版权所有（C）2003约翰威利父子有限公司。
A comparative numerical study is employed to investigate the heat and mass transfer between air and falling film desiccant in parallel and counter flow configurations. Nanoparticles suspensions are added to the falling film desiccant to study heat and mass transfer enhancements. The numerical results show that the parallel flow channel provides better dehumidification and cooling processes of the air than counter flow configuration for a wide range of pertinent parameters. Low air Reynolds number enhances the dehumidification and cooling rates of the air and high air Reynolds number improves the regeneration rate of the liquid desiccant. An increase in the channel height results in enhancing the dehumidification and cooling processes of air and regeneration rate of liquid desiccant. The dehumidification and cooling rates of air are improved with an increase in the volume fraction of nanoparticles and dispersion factor. Copyright (C) 2003 John Wiley Sons, Ltd.