导管(解剖学)
干燥剂
湿度
传质
入口
机械
传热
材料科学
机械工程
工程类
热力学
复合材料
物理
医学
病理
作者
X.J. Zhang,Yanjun Dai,R.Z. Wang
标识
DOI:10.1016/s1359-4311(03)00047-4
摘要
A one-dimensional coupled heat and mass transfer model, which is expected for use in designing and manufacturing of a honeycombed rotary desiccant wheel, is presented in this paper. The mathematical model has been validated using a real desiccant wheel, and the calculation results are in reasonable agreement with the experimental data. Based on this model, the temperature and humidity profiles in the wheel during both the dehumidification and the regeneration processes are analyzed and verified by experimental data. The numerical results indicate that in the regeneration process a hump curve of air humidity ratio along the channel exists all the time. In the regeneration process the hump of air humidity ratio moves from the duct entrance to the duct exit and increases gradually until the hump reaches the duct exit, where the hump will drop subsequently. The effects of velocity of regeneration air Vreg inlet temperature of regeneration air Treg and velocity of process air Vad on the hump moving speed are investigated. To improve the performance of desiccant wheel, it is essential to accelerate the hump moving from the duct entrance to the duct exit as soon as possible.
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