化工学报2012，Vol.63Issue(3)：713-720,8.DOI:10.3969/j.issn.0438-1157.2012.03.006
扭曲椭圆管换热的壳程强化传热特性
Shell side heat transfer enhancement in twisted elliptical tube heat exchanger
摘要
Abstract
Heat transfer and pressure drop of twisted elliptical tube heat exchanger with FrM = 79 are tested in the present work. Based on the experimental result, the application range of previous correlations for twisted elliptical tube heat exchanger with FrM>232 and FrM = 64 is analyzed, and correlations of the tested heat exchanger with FrM = 79 are derived. The testing result indicates that there exists a change of fluid flowing state when Re, increases to 8000. Two heat exchangers with similar geometric parameters to the tested one but supported by segmental baffles and rod baffles are designed. Their shell side heat transfer coefficients and pressure drops are calculated with Bell-Delaware method and Gentry's method, respectively. Heat transfer coefficients and pressure drops of the two designed heat exchangers are compared with the tested twisted elliptical tube heat exchanger. Comprehensive performance of the three heat exchangers is studied. The twisted elliptical tube heat exchanger gives the highest heat transfer coefficient and lowest pressure drop. This type of heat exchanger has the advantages of segmental heat exchanger and rod baffle heat exchanger and will be widely used in the industry.关键词
扭曲椭圆管换热器/壳程传热膜系数/壳程压降/综合性能Key words
twisted elliptical tube heat exchanger/shell side heat transfer coefficient/shell side pressure drop/comprehensive performance分类
能源科技引用本文复制引用
谭祥辉,孙赫,张立振,朱冬生..扭曲椭圆管换热的壳程强化传热特性[J].化工学报,2012,63(3):713-720,8.基金项目
华东理工大学交叉学科与重大项目培育基金项目(WG1013009). （WG1013009）
