低温工况下翅片管换热器的设计计算.pdf

低温与超导低温技术 Cryo. & Supercond.
第 36卷第 4期 Cryogenics Vol. 36 No. 4
低温工况下翅片管换热器的设计计算
陈叔平 1 , 来进琳 1 ,陈光奇 2 ,李喜全 1 , 谢振刚 1
(1. 兰州理工大学石油化工学院, 兰州 730050; 2. 兰州物理研究所,兰州 730000)
摘要:采用分段模型将气化压力高于介质临界压力的翅片管换热器内低温介质的气化过程分为液相、气相两
个传热区。同时考虑气化过程中翅片管表面结霜情况,对低温介质在翅片管换热器内的吸热气化过程进行传热分
析,给出了适合各分区传热特性的计算关联式,为工程设计提供参考。
关键词:翅片管换热器;分区计算;结霜;传热
D esign ca lcula tion of f inned - tube hea t exchanger under low tem pera ture cond ition s
Chen Shup ing1 , Lai J inlin1 , Chen Guangqi2 , L i Xiquan1 , Xie Zhengang1
(1. Lanzhou University of Technology, Lanzhou 730050, China; 2. Lanzhou Institute of Physics, Lanzhou 730000, China)
Abstract: The gasification p rocess of a cryogenic medium in a finned - tube exchanger which gasification p ressure is higher
than the critical p ressure of the cryogenic medium is divided into two sections by adop ting divisional model, i. e. liquid - phase
and gas - phase. The heat transfer analysis about gasification p rocess of the cryogenic liquid in a finned - tube heat exchanger is
made under frosting condition. The correlative formulas suitable to heat transfer characteristics of each heat transfer section are
summarized. It p rovides a reference for the design of finned - tube exchangers.
Keywords: Finned - tube heat exchanger, D ivision calculation, Frosting, Heat transfer
1 引言是当前急需解决的问题。国内文献对此进行过不
少的理论分析与实验研究,目前仍未得出一个比
空温式翅片管换热器是通过吸收外