聚丙烯中空纤维换热器的数值模拟  

Numerical Simulation for Polypropylene Hollow Fiber Heat Exchanger

作　　者：刘宝亮[1] 闫秀娟[1] 刘军[1] 赵捷[1] 李保安[1] Liu Baoliang Yah Xiujuan Liu Jun Zhao Jie Li Baoan(Chemical Engineering Research Center, State Key Laboratory of Chemical Engineering, Tianjin Key Laboratory of Membrane Science and Desalination Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, Chin)

机构地区：[1]天津大学化工学院,化学工程研究所,化学工程联合国家重点实验室,天津市膜科学与海水淡化技术重点实验室,天津化学化工协同创新中心,天津300072

出　　处：《化学工业与工程》2017年第1期90-95,共6页Chemical Industry and Engineering

基　　金：天津市科技支撑计划项目(12ZCZDSF02200)

摘　　要：由于具有抗腐蚀和结垢的优点,中空纤维换热器在低温下的应用受到关注。为了提高中空纤维换热器的换热效率,以在换热器的壳程增加弓形折流挡板的方式对中空纤维换热器的结构进行了优化研究。利用Gambit 2.4软件,建立了管壳式中空纤维换热器模型;利用Fluent 6.3软件,进行有限体积分析计算。结果表明:数值模拟得到的换热器总传热系数和壳程压降与实验值的误差分别小于8%和6%。通过对比分析发现,在模拟范围内增加弓形折流挡板以后中空纤维换热器的总换热系数提高了21%左右,换热器壳程热阻占总热阻的比例从59%~70%降低到了46%~57%,换热器的壳程压降提高了约12%,但是壳程换热系数与壳程压降的比也明显升高。加弓形折流挡板的中空纤维换热器比无折流挡板的换热器具有更好的换热效率。Hollow fiber heat exchangers（ HFHEs） have gained more attention because of their great resistances to chemical corrosion and fouling for lower temperature applications. In this study,a new structure of HFHE by adding segmental baffles in the shell-side was proposed to strengthen the heat transfer efficiency. Three-dimensional models of HFHEs were built by Gambit 2. 4. The models were calculated with the help of Fluent 6. 3 by finite volume method. Results show that the deviation of overall heat transfer coefficient（ U） and pressure drop of shell-side between simulated and experimental results is less than8% and 6%,respectively. After adding segmental baffles in HFHE shell-side,the overall heat transfer coefficient is improved by 21% on the condition of simulation,the ratio of shell-side resistance to overall resistance is decreased approximately from 59% —70% to 46% —57%,the pressure drop of shell-side is improved by 12%,but the ratio of shell-side heat transfer coefficient to pressure drop is also greatly increased. HFHE with baffles has better integrated performance than PHFHE without baffles.

关 键 词：中空纤维换热器 弓形折流挡板 数学模拟 换热效率 

分 类 号：TQ34[化学工程—化纤工业]