Numerical Simulation for Heat Transfer Enhancement of a Heat Exchanger with Helical Baffles

doi:10.7652/xjtuxb201409008

您当前的位置：

首页 >

文章列表页 >

Numerical Simulation for Heat Transfer Enhancement of a Heat Exchanger with Helical Baffles

更新时间：2025-07-09

- Numerical Simulation for Heat Transfer Enhancement of a Heat Exchanger with Helical Baffles
- Vol. 48, Issue 9, Pages: 43-48(2014)
- 作者机构：
  
  西安交通大学能源与动力工程学院,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201409008
  CLC： TK124
- Online First：10 September 2014，
  
  Published：2014
- 稿件说明：
移动端阅览
Numerical Simulation for Heat Transfer Enhancement of a Heat Exchanger with Helical Baffles[J]. 2014, 48(9): 43-48.
DOI：

Numerical Simulation for Heat Transfer Enhancement of a Heat Exchanger with Helical Baffles[J]. 2014, 48(9): 43-48. DOI： 10.7652/xjtuxb201409008.

摘要

针对目前常用螺旋折流板换热器壳程的一个螺距主要采用4块折流板结构而严重影响换热器性能的问题

提出了一种旋梯式折面折流板新结构

用来封闭原始折流板之间的三角漏流区

使壳程流体接近连续的螺旋状流动。模拟结果表明:采用旋梯式折面折流板代替原始的扇形折流板后

换热器壳程流体的切向和径向速度大幅提升

轴向速度略有降低; 换热器总传热系数增加51.7%～66.1%

壳程压降增加159.8%～186.2%

换热器的热性能因子提高了10.4%～17.0%

平均增加14.1%。采用旋梯式折面折流板能有效提高螺旋折流板的换热性能

且具有定位和安装简单、方便等优点

对于换热器的节能优化设计具有重要的指导意义。

Abstract

Four plain baffles are currently used to form a helical pitch in helical baffle heat exchangers

which degrades heat transfer performance of heat exchanger obviously. A new structure of ladder-type fold baffle is proposed to block the triangular leakage zones between two adjacent plain baffles

which forces the shell-side fluid to move in an approximately continuous spiral flow. Numerical simulation results show that there is a significant increase in tangential and radial velocity of the shell-side fluid

but the axial velocity is slightly lower in the improved heat exchanger with ladder-type fold baffles. The overall heat transfer coefficient of the improved heat exchanger increases by 51.7%-66.1% and the shell-side pressure drop increases by 159.8%-186.2%. The thermal performance factor TEF enhances by 10.4%-17.0%

with an average increase of 14.1%. The ladder-type fold baffles can effectively improve the heat transfer performance of helical baffle heat exchangers

and are convenient to locate and install.

关键词

Keywords

references

KRAL D, STELIK P, VAN DER PLOEG H J, et al. Helical baffles in shell-and-tube heat exchangers: part one Experimental verification[J]. Heat Transfer Engineering, 1996, 17(1): 93-101.

王良, 罗来勤, 王秋旺, 等. 螺旋折流板换热器中阻流板对换热及沿程压降的影响[J]. 工程热物理学报, 2001, 22(增刊): 173-176.

WANG Liang, LUO Laiqin, WANG Qiuwang, et al. Effect of inserting block plates on pressure drop and heat transfer in shell-and-tube heat exchangers with helical baffles[J]. Journal of Engineering Thermophysics, 2001, 22(S): 173-176.

宋小平, 裴志中. 防短路螺旋折流板管壳式换热器[J]. 石油化工设备技术, 2007, 28(3): 13-17.

SONG Xiaoping, PEI Zhizhong. Shell and tube heat exchangers with anti-short circuit spiral[J]. Petro-Chemical Equipment Technology, 2007, 28(3): 13-17.

WANG S M, WEN J, LI Y Z. An experimental investigation of heat transfer enhancement for a shell-and-tube heat exchanger[J]. Appl Therm Eng, 2009, 29(11/12): 2433-2438.

PENG B, WANG Q W, ZHANG C, et al. An experimental study of shell-and-tube heat exchangers with continuous helical baffles[J]. ASME Journal of Heat Transfer, 2007, 129(10): 1425-1431.

王斯民, 文键. 无短路区新型螺旋折流板换热器换热性能的实验研究[J]. 西安交通大学学报, 2012, 46(9): 12-16

WANG Simin, WEN Jian. Experiment on heat transfer performance of helical baffled heat exchanger without short circuit flow[J]. Journal of Xi'an Jiaotong University, 2012, 46(9): 12-16.

ZHANG J F, HE Y L, TAO W Q. 3D numerical simulation on shell-and-tube heat exchangers with middle-overlapped helical baffles and continuous baffles: part Ⅱ Simulation results of periodic model and comparison between continuous and noncontinuous helical baffles[J]. International Journal of Heat and Mass Transfer, 2009, 52(23/24): 5381-5389.

LEI Y G, HE Y L, CHU P, et al. Design and optimization of heat exchangers with helical baffles[J]. Chem Eng Sci, 2008, 63(17): 4386-4395.

曹春暖. 高效螺旋折面板换热器数值模拟研究[D]. 西安: 西安交通大学, 2013.

SASA A K, MALIK T. Mixed convective flow and heat transfer through a horizontal channel with surface mounted obstacles[J]. Enhanced Heat Transfer, 2012, 19(4): 313-329.

PROMVONGE P, KOOLNAPADOL N, PIMSARN M, et al. Thermal performance enhancement in a heat exchanger tube fitted with inclined vortex rings[J]. Appl Therm Eng, 2014, 62(1): 285-292.

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Numerical Simulation for Configuration Optimization of Heat Exchanger with Helical Baffles

Energy Efficiency Optimization of the Cryogenic Air Separation Process for Electronic-Grade Ultra Pure Nitrogen

Turbulent Kinetic Energy Dissipation Mechanism of Supercritical Carbon Dioxide Leakage Flow in a Scallop Bionic Seal Cavity

Study on the Thermodynamic Properties in the Anomalous Region of Supercritical Water

I/O Performance Modeling and Prediction Method for Large-Scale Parallel Applications Using Machine Learning

Related Author

王斯民 2

杜冬冬 1

Related Institution

No data

⁰