Comprehensive performance of variable-pitch overlapped helical baffled heat exchangers

DU Tingting; CHE Kai; WANG Danhua; CHENG Lin

doi:10.11949/j.issn.0438-1157.20150557

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Comprehensive performance of variable-pitch overlapped helical baffled heat exchangers

更新时间：2025-12-10

- Comprehensive performance of variable-pitch overlapped helical baffled heat exchangers
- CIESC Journal Issue S2, Pages: 143-152(2015)
- 作者机构：
  
  山东大学热科学与工程研究中心,山东,济南,250061
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20150557
  CLC： K124
- Online First：31 August 2015，
  
  Published：31 August 2015
- 稿件说明：
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DU Tingting, CHE Kai, WANG Danhua, et al. Comprehensive performance of variable-pitch overlapped helical baffled heat exchangers[J]. CIESC Journal, 2015, (S2): 143-152.
DOI：

DU Tingting, CHE Kai, WANG Danhua, et al. Comprehensive performance of variable-pitch overlapped helical baffled heat exchangers[J]. CIESC Journal, 2015, (S2): 143-152. DOI： 10.11949/j.issn.0438-1157.20150557.

摘要

为解决三角区漏流对壳程综合性能的影响

设计提出变螺距搭接螺旋折流板换热器

并进行了数值模拟和综合性能分析。结果表明

变螺距搭接螺旋折流板换热器的综合性能主要受螺旋角组合方式、螺旋周期数量和工质物性参数影响;在一定程度上能够实现优化三角漏流区的目的

某些螺旋角组合方式下的换热器综合性能明显优于相同螺旋角下的等螺距换热器;当变螺距螺旋折流板换热器与等螺距螺旋折流板换热器综合性能相同时

其还具有强化壳侧传热或节省折流板用耗材和便于安装的优点。

Abstract

Variable-pitch overlapped helical baffled heat exchangers were proposed and designed to improve the influence of leakage in triangle zone on the shell-side comprehensive performance.The comprehensive performance was analyzed based on numerical simulation.The results show that the main influence factors on variable-pitch helical baffled heat exchangers are helix angle combination

numbers of helix period and physical parameter of working medium.Variable-pitch helical baffled heat exchangers could improve the triangle leakage zone to some extent.Comprehensive performance of variable-pitch helical baffled heat exchanger is better than that of constant helical baffled heat exchangers with the same helix angle.When the comprehensive performance of the two kinds of helical baffled heat exchangers are the same

variable-pitch heat exchangers could enhance the heat transfer or save material of helical baffles and installing time.

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