肋板式吸附床传热性能的数值模拟  

Numerical simulation on heat transfer performance in fin-plate adsorption bed

作　　者：邓艳芝[1] 凌祥[1] 

机构地区：[1]南京工业大学机械与动力工程学院,南京210009

出　　处：《低温工程》2009年第2期26-30,42,共6页Cryogenics

基　　金：教育部新世纪优秀人才支持计划(NCET-07-0434)

摘　　要：设计了新型肋板式结构吸附床,建立了吸附床在非第一类边界条件的三维传热传质数学模型。应用计算流体动力学中有限控制体积方法对吸附床内传热特性进行了模拟计算,并通过研究吸附床内温度随时间的动态变化,分析了换热流体参数和吸附剂导热系数变化对床层传热特性的影响。计算结果表明,吸附剂的导热系数,换热流体流速、温度对床层传热特性影响显著且肋板式吸附床传热效率高,吸附床内温度分布均匀。A three-dimensional mathematic model with heat transfer and mass transfer in non-first class boundary condition for fin-plate adsorption bed was established. By using the method of finite control volume in CFD, the simulation calculation for heat transfer in adsorption bed was performed. The influence of heat transfer fluid parameters and adsorbent＇s thermal conductivity on the heat transfer characteristic of adsorption bed layer was analyzed by studying the dynamic changes of temperature following the time in adsorption bed. The computational results show that the thermal conductivity of adsorbent, flow rate and temperature of the heat transfer fluid has an important effect on the temperature of bed and the fin-plate adsorption bed has higher heat transfer efficiency and symmetrical distribution of temperature in adsorption bed.

关 键 词：吸附制冷 肋板式吸附床 活性炭-氨 数值模拟 传热性能 

分 类 号：TB616[一般工业技术—制冷工程]